AVCodecContext Struct Reference

main external API structure. More...

#include <avcodec.h>

Data Fields
const AVClass *	av_class
	information on struct for av_log set by avcodec_alloc_context
int	bit_rate
	the average bitrate encoding: Set by user; unused for constant quantizer encoding.
int	bit_rate_tolerance
	number of bits the bitstream is allowed to diverge from the reference.
int	flags
	CODEC_FLAG_*.
int	sub_id
	Some codecs need additional format info.
int	me_method
	Motion estimation algorithm used for video coding.
uint8_t *	extradata
	some codecs need / can use extradata like Huffman tables.
int	extradata_size
AVRational	time_base
	This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
int	width
	picture width / height.
int	height
int	gop_size
	the number of pictures in a group of pictures, or 0 for intra_only encoding: Set by user.
enum PixelFormat	pix_fmt
	Pixel format, see PIX_FMT_xxx.
int	rate_emu
	Frame rate emulation.
void(*	draw_horiz_band )(struct AVCodecContext *s, const AVFrame *src, int offset[4], int y, int type, int height)
	If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.
int	sample_rate
	samples per second
int	channels
	number of audio channels
enum AVSampleFormat	sample_fmt
	audio sample format encoding: Set by user.
int	frame_size
	Samples per packet, initialized when calling 'init'.
int	frame_number
	audio or video frame number
int	real_pict_num
	Returns the real picture number of previous encoded frame.
int	delay
	Number of frames the decoded output will be delayed relative to the encoded input.
float	qcompress
	amount of qscale change between easy & hard scenes (0.0-1.0)
float	qblur
	amount of qscale smoothing over time (0.0-1.0)
int	qmin
	minimum quantizer encoding: Set by user.
int	qmax
	maximum quantizer encoding: Set by user.
int	max_qdiff
	maximum quantizer difference between frames encoding: Set by user.
int	max_b_frames
	maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.
float	b_quant_factor
	qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
int	rc_strategy
	obsolete FIXME remove
int	b_frame_strategy
int	hurry_up
	hurry up amount encoding: unused decoding: Set by user.
struct AVCodec *	codec
void *	priv_data
int	rtp_payload_size
void(*	rtp_callback )(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
int	mv_bits
int	header_bits
int	i_tex_bits
int	p_tex_bits
int	i_count
int	p_count
int	skip_count
int	misc_bits
int	frame_bits
	number of bits used for the previously encoded frame encoding: Set by libavcodec.
void *	opaque
	Private data of the user, can be used to carry app specific stuff.
char	codec_name [32]
enum AVMediaType	codec_type
enum CodecID	codec_id
unsigned int	codec_tag
	fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	workaround_bugs
	Work around bugs in encoders which sometimes cannot be detected automatically.
int	luma_elim_threshold
	luma single coefficient elimination threshold encoding: Set by user.
int	chroma_elim_threshold
	chroma single coeff elimination threshold encoding: Set by user.
int	strict_std_compliance
	strictly follow the standard (MPEG4, .
float	b_quant_offset
	qscale offset between IP and B-frames encoding: Set by user.
int	error_recognition
	Error recognization; higher values will detect more errors but may misdetect some more or less valid parts as errors.
int(*	get_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of each frame to get a buffer for it.
void(*	release_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called to release buffers which were allocated with get_buffer.
int	has_b_frames
	Size of the frame reordering buffer in the decoder.
int	block_align
	number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
int	parse_only
int	mpeg_quant
	0-> h263 quant 1-> mpeg quant encoding: Set by user.
char *	stats_out
	pass1 encoding statistics output buffer encoding: Set by libavcodec.
char *	stats_in
	pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.
float	rc_qsquish
	ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
float	rc_qmod_amp
int	rc_qmod_freq
RcOverride *	rc_override
	ratecontrol override, see RcOverride encoding: Allocated/set/freed by user.
int	rc_override_count
const char *	rc_eq
	rate control equation encoding: Set by user decoding: unused
int	rc_max_rate
	maximum bitrate encoding: Set by user.
int	rc_min_rate
	minimum bitrate encoding: Set by user.
int	rc_buffer_size
	decoder bitstream buffer size encoding: Set by user.
float	rc_buffer_aggressivity
float	i_quant_factor
	qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
float	i_quant_offset
	qscale offset between P and I-frames encoding: Set by user.
float	rc_initial_cplx
	initial complexity for pass1 ratecontrol encoding: Set by user.
int	dct_algo
	DCT algorithm, see FF_DCT_* below encoding: Set by user.
float	lumi_masking
	luminance masking (0-> disabled) encoding: Set by user.
float	temporal_cplx_masking
	temporary complexity masking (0-> disabled) encoding: Set by user.
float	spatial_cplx_masking
	spatial complexity masking (0-> disabled) encoding: Set by user.
float	p_masking
	p block masking (0-> disabled) encoding: Set by user.
float	dark_masking
	darkness masking (0-> disabled) encoding: Set by user.
int	idct_algo
	IDCT algorithm, see FF_IDCT_* below.
int	slice_count
	slice count encoding: Set by libavcodec.
int *	slice_offset
	slice offsets in the frame in bytes encoding: Set/allocated by libavcodec.
int	error_concealment
	error concealment flags encoding: unused decoding: Set by user.
unsigned	dsp_mask
	dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.
int	bits_per_coded_sample
	bits per sample/pixel from the demuxer (needed for huffyuv).
int	prediction_method
	prediction method (needed for huffyuv) encoding: Set by user.
AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
AVFrame *	coded_frame
	the picture in the bitstream encoding: Set by libavcodec.
int	debug
	debug encoding: Set by user.
int	debug_mv
	debug encoding: Set by user.
uint64_t	error [4]
	error encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
int	mb_qmin
	minimum MB quantizer encoding: unused decoding: unused
int	mb_qmax
	maximum MB quantizer encoding: unused decoding: unused
int	me_cmp
	motion estimation comparison function encoding: Set by user.
int	me_sub_cmp
	subpixel motion estimation comparison function encoding: Set by user.
int	mb_cmp
	macroblock comparison function (not supported yet) encoding: Set by user.
int	ildct_cmp
	interlaced DCT comparison function encoding: Set by user.
int	dia_size
	ME diamond size & shape encoding: Set by user.
int	last_predictor_count
	amount of previous MV predictors (2a+1 x 2a+1 square) encoding: Set by user.
int	pre_me
	prepass for motion estimation encoding: Set by user.
int	me_pre_cmp
	motion estimation prepass comparison function encoding: Set by user.
int	pre_dia_size
	ME prepass diamond size & shape encoding: Set by user.
int	me_subpel_quality
	subpel ME quality encoding: Set by user.
enum PixelFormat(*	get_format )(struct AVCodecContext *s, const enum PixelFormat *fmt)
	callback to negotiate the pixelFormat
int	dtg_active_format
	DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.
int	me_range
	maximum motion estimation search range in subpel units If 0 then no limit.
int	intra_quant_bias
	intra quantizer bias encoding: Set by user.
int	inter_quant_bias
	inter quantizer bias encoding: Set by user.
int	color_table_id
	color table ID encoding: unused decoding: Which clrtable should be used for 8bit RGB images.
int	internal_buffer_count
	internal_buffer count Don't touch, used by libavcodec default_get_buffer().
void *	internal_buffer
	internal_buffers Don't touch, used by libavcodec default_get_buffer().
int	global_quality
	Global quality for codecs which cannot change it per frame.
int	coder_type
	coder type encoding: Set by user.
int	context_model
	context model encoding: Set by user.
int	slice_flags
	slice flags encoding: unused decoding: Set by user.
int	xvmc_acceleration
	XVideo Motion Acceleration encoding: forbidden decoding: set by decoder.
int	mb_decision
	macroblock decision mode encoding: Set by user.
uint16_t *	intra_matrix
	custom intra quantization matrix encoding: Set by user, can be NULL.
uint16_t *	inter_matrix
	custom inter quantization matrix encoding: Set by user, can be NULL.
unsigned int	stream_codec_tag
	fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	scenechange_threshold
	scene change detection threshold 0 is default, larger means fewer detected scene changes.
int	lmin
	minimum Lagrange multipler encoding: Set by user.
int	lmax
	maximum Lagrange multipler encoding: Set by user.
struct AVPaletteControl *	palctrl
	palette control structure encoding: ??? (no palette-enabled encoder yet) decoding: Set by user.
int	noise_reduction
	noise reduction strength encoding: Set by user.
int(*	reget_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of a frame to get cr buffer for it.
int	rc_initial_buffer_occupancy
	Number of bits which should be loaded into the rc buffer before decoding starts.
int	inter_threshold
	encoding: Set by user.
int	flags2
	CODEC_FLAG2_* encoding: Set by user.
int	error_rate
	Simulates errors in the bitstream to test error concealment.
int	antialias_algo
	MP3 antialias algorithm, see FF_AA_* below.
int	quantizer_noise_shaping
	quantizer noise shaping encoding: Set by user.
int	thread_count
	thread count is used to decide how many independent tasks should be passed to execute() encoding: Set by user.
int(*	execute )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
	The codec may call this to execute several independent things.
void *	thread_opaque
	thread opaque Can be used by execute() to store some per AVCodecContext stuff.
int	me_threshold
	Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.
int	mb_threshold
	Macroblock threshold below which the user specified macroblock types will be used.
int	intra_dc_precision
	precision of the intra DC coefficient - 8 encoding: Set by user.
int	nsse_weight
	noise vs.
int	skip_top
	Number of macroblock rows at the top which are skipped.
int	skip_bottom
	Number of macroblock rows at the bottom which are skipped.
int	profile
	profile encoding: Set by user.
int	level
	level encoding: Set by user.
int	lowres
	low resolution decoding, 1-> 1/2 size, 2->1/4 size encoding: unused decoding: Set by user.
int	coded_width
	Bitstream width / height, may be different from width/height if lowres or other things are used.
int	coded_height
int	frame_skip_threshold
	frame skip threshold encoding: Set by user.
int	frame_skip_factor
	frame skip factor encoding: Set by user.
int	frame_skip_exp
	frame skip exponent encoding: Set by user.
int	frame_skip_cmp
	frame skip comparison function encoding: Set by user.
float	border_masking
	Border processing masking, raises the quantizer for mbs on the borders of the picture.
int	mb_lmin
	minimum MB lagrange multipler encoding: Set by user.
int	mb_lmax
	maximum MB lagrange multipler encoding: Set by user.
int	me_penalty_compensation
	encoding: Set by user.
enum AVDiscard	skip_loop_filter
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_idct
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_frame
	encoding: unused decoding: Set by user.
int	bidir_refine
	encoding: Set by user.
int	brd_scale
	encoding: Set by user.
float	crf
	constant rate factor - quality-based VBR - values ~correspond to qps encoding: Set by user.
int	cqp
	constant quantization parameter rate control method encoding: Set by user.
int	keyint_min
	minimum GOP size encoding: Set by user.
int	refs
	number of reference frames encoding: Set by user.
int	chromaoffset
	chroma qp offset from luma encoding: Set by user.
int	bframebias
	Influences how often B-frames are used.
int	trellis
	trellis RD quantization encoding: Set by user.
float	complexityblur
	Reduce fluctuations in qp (before curve compression).
int	deblockalpha
	in-loop deblocking filter alphac0 parameter alpha is in the range -6.
int	deblockbeta
	in-loop deblocking filter beta parameter beta is in the range -6.
int	partitions
	macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4 encoding: Set by user.
int	directpred
	direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto) encoding: Set by user.
int	cutoff
	Audio cutoff bandwidth (0 means "automatic") encoding: Set by user.
int	scenechange_factor
	Multiplied by qscale for each frame and added to scene_change_score.
int	mv0_threshold
	Note: Value depends upon the compare function used for fullpel ME.
int	b_sensitivity
	Adjusts sensitivity of b_frame_strategy 1.
int	compression_level
	encoding: Set by user.
int	use_lpc
	Sets whether to use LPC mode - used by FLAC encoder.
int	lpc_coeff_precision
	LPC coefficient precision - used by FLAC encoder encoding: Set by user.
int	min_prediction_order
	encoding: Set by user.
int	max_prediction_order
	encoding: Set by user.
int	prediction_order_method
	search method for selecting prediction order encoding: Set by user.
int	min_partition_order
	encoding: Set by user.
int	max_partition_order
	encoding: Set by user.
int64_t	timecode_frame_start
	GOP timecode frame start number, in non drop frame format encoding: Set by user.
int	request_channels
	Decoder should decode to this many channels if it can (0 for default) encoding: unused decoding: Set by user.
float	drc_scale
	Percentage of dynamic range compression to be applied by the decoder.
int64_t	reordered_opaque
	opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
int	bits_per_raw_sample
	Bits per sample/pixel of internal libavcodec pixel/sample format.
int64_t	channel_layout
	Audio channel layout.
int64_t	request_channel_layout
	Request decoder to use this channel layout if it can (0 for default) encoding: unused decoding: Set by user.
float	rc_max_available_vbv_use
	Ratecontrol attempt to use, at maximum, of what can be used without an underflow.
float	rc_min_vbv_overflow_use
	Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.
struct AVHWAccel *	hwaccel
	Hardware accelerator in use encoding: unused.
int	ticks_per_frame
	For some codecs, the time base is closer to the field rate than the frame rate.
void *	hwaccel_context
	Hardware accelerator context.
enum AVColorPrimaries	color_primaries
	Chromaticity coordinates of the source primaries.
enum AVColorTransferCharacteristic	color_trc
	Color Transfer Characteristic.
enum AVColorSpace	colorspace
	YUV colorspace type.
enum AVColorRange	color_range
	MPEG vs JPEG YUV range.
enum AVChromaLocation	chroma_sample_location
	This defines the location of chroma samples.
int(*	execute2 )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
	The codec may call this to execute several independent things.
int	weighted_p_pred
	explicit P-frame weighted prediction analysis method 0: off 1: fast blind weighting (one reference duplicate with -1 offset) 2: smart weighting (full fade detection analysis) encoding: Set by user.
int	aq_mode
	AQ mode 0: Disabled 1: Variance AQ (complexity mask) 2: Auto-variance AQ (experimental) encoding: Set by user decoding: unused.
float	aq_strength
	AQ strength Reduces blocking and blurring in flat and textured areas.
float	psy_rd
	PSY RD Strength of psychovisual optimization encoding: Set by user decoding: unused.
float	psy_trellis
	PSY trellis Strength of psychovisual optimization encoding: Set by user decoding: unused.
int	rc_lookahead
	RC lookahead Number of frames for frametype and ratecontrol lookahead encoding: Set by user decoding: unused.
float	crf_max
	Constant rate factor maximum With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse than crf_max, even if doing so would violate VBV restrictions.
int	log_level_offset
enum AVLPCType	lpc_type
	Determines which LPC analysis algorithm to use.
int	lpc_passes
	Number of passes to use for Cholesky factorization during LPC analysis encoding: Set by user decoding: unused.
int	slices
	Number of slices.
uint8_t *	subtitle_header
	Header containing style information for text subtitles.
int	subtitle_header_size
AVPacket *	pkt
	Current packet as passed into the decoder, to avoid having to pass the packet into every function.
int	is_copy
	Whether this is a copy of the context which had init() called on it.
int	thread_type
	Which multithreading methods to use.
int	active_thread_type
	Which multithreading methods are in use by the codec.
int	thread_safe_callbacks
	Set by the client if its custom get_buffer() callback can be called from another thread, which allows faster multithreaded decoding.
uint64_t	vbv_delay
	VBV delay coded in the last frame (in periods of a 27 MHz clock).
int64_t	pts_correction_num_faulty_pts
	Current statistics for PTS correction.
int64_t	pts_correction_num_faulty_dts
	Number of incorrect PTS values so far.
int64_t	pts_correction_last_pts
	Number of incorrect DTS values so far.
int64_t	pts_correction_last_dts
	PTS of the last frame.

---

Detailed Description

main external API structure.

New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. sizeof(AVCodecContext) must not be used outside libav*.

Definition at line 994 of file avcodec.h.

---

Field Documentation

const AVClass* AVCodecContext::av_class

information on struct for av_log

• set by avcodec_alloc_context

Definition at line 999 of file avcodec.h.

Referenced by avcodec_get_context_defaults2().

int AVCodecContext::bit_rate

the average bitrate

• encoding: Set by user; unused for constant quantizer encoding.

• decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.

Definition at line 1005 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), add_audio_stream(), add_av_stream(), add_codec(), add_video_stream(), adx_decode_header(), aea_read_header(), amf_parse_object(), apc_read_header(), asf_read_header(), asf_write_header1(), atrac3_decode_init(), audio_encode_example(), av_estimate_timings_from_bit_rate(), av_new_stream(), avi_write_header(), avisynth_read_header(), bfi_read_header(), cin_read_header(), compute_bandwidth(), compute_status(), cook_decode_init(), daud_header(), dc1394_read_common(), dca_decode_frame(), decode_frame(), decode_ppc(), decode_wave_header(), dv_extract_audio_info(), dv_extract_video_info(), dv_init_demux(), dv_offset_reset(), dv_produce_packet(), ea_read_header(), encode_init(), Faac_encode_init(), fbdev_read_header(), ff_aac_ac3_parse(), ff_dnxhd_find_cid(), ff_parse_specific_params(), ff_wma_init(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), film_read_header(), find_stream_in_feed(), flic_read_header(), flv_write_header(), fourxm_read_header(), g726_init(), get_aiff_header(), get_audio_frame_size(), get_bit_rate(), get_sindex(), grab_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), idcin_read_header(), iff_read_header(), init_bitstream_params(), ipmovie_read_header(), iss_read_header(), lame_window_init(), libdirac_encode_init(), libgsm_init(), libschroedinger_encode_init(), lxf_read_header(), matroska_read_header(), mlp_parse(), mmf_read_header(), modify_current_stream(), mov_build_index(), mov_write_esds_tag(), mov_write_uuidprof_tag(), mp3_parse_vbr_tags(), MP3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_read_header(), mpegvideo_extract_headers(), MPV_encode_init(), mtv_read_header(), mxf_write_d10_video_packet(), mxf_write_header(), mxf_write_mpegvideo_desc(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_parse_header(), pcm_read_seek(), psy_3gpp_window(), qcp_read_header(), qdm2_decode_init(), ra144_encode_init(), read_desc_chunk(), read_header(), real_parse_asm_rule(), rl2_read_header(), rm_read_header(), rm_write_header(), roq_read_packet(), rv10_write_header(), search_for_quantizers_twoloop(), seq_read_header(), sipr_decoder_init(), sox_read_header(), tmv_read_header(), transcode(), twin_decode_frame(), twin_decode_init(), v4l2_read_header(), validate_options(), vid_read_header(), vid_read_packet(), video_encode_example(), vmd_read_header(), voc_get_packet(), vorbis_header(), vp8_init(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xa_read_header(), and XAVS_init().

int AVCodecContext::bit_rate_tolerance

number of bits the bitstream is allowed to diverge from the reference.

the reference can be CBR (for CBR pass1) or VBR (for pass2)

• encoding: Set by user; unused for constant quantizer encoding.
• decoding: unused

Definition at line 1013 of file avcodec.h.

Referenced by add_codec(), ff_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), parse_ffconfig(), and XAVS_init().

int AVCodecContext::flags

CODEC_FLAG_*.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1020 of file avcodec.h.

Referenced by aac_encode_frame(), ac3_encode_init(), add_audio_stream(), add_video_stream(), av_parser_change(), av_write_header(), avcodec_default_get_buffer(), avcodec_string(), common_init(), comp_block(), config(), dct_get(), decode_frame(), dnxhd_decode_macroblock(), dnxhd_encode_init(), do_video_stats(), dsputil_init_mmx(), dsputilenc_init_mmx(), dv_guess_dct_mode(), encode_block(), encode_frame(), encode_init(), estimate_best_b_count(), Faac_encode_init(), ff_dnxhd_find_cid(), ff_fmt_convert_init_altivec(), ff_fmt_convert_init_arm(), ff_h263_decode_frame(), ff_mjpeg_decode_init(), ff_rv34_decode_init(), ffm_read_header(), ffm_write_header(), flac_write_header(), float_init_altivec(), get_flags(), h261_decode_frame(), halfpel_interpol(), idct_put(), indeo3_decode_frame(), intra_predict(), iv_decode_frame(), lame_window_init(), libdirac_encode_init(), libschroedinger_encode_init(), mjpeg_decode_scan(), mkv_write_header(), mov_write_udta_tag(), MP3lame_encode_init(), mpeg_decode_frame(), mpeg_decode_init(), MPV_common_init(), MPV_encode_init(), mxf_write_header(), mxf_write_identification(), new_audio_stream(), new_subtitle_stream(), new_video_stream(), ogg_write_header(), oggvorbis_init_encoder(), opt_input_file(), parse_ffconfig(), print_report(), read_ffserver_streams(), remove_extradata(), render_slice(), sp5x_decode_frame(), stream_component_open(), svq1_decode_init(), svq1_encode_plane(), svq3_decode_init(), tgq_idct_put_mb(), tgq_idct_put_mb_dconly(), tqi_idct_put(), transcode(), unpack_dct_coeffs(), update_context_from_user(), validate_thread_parameters(), vc1_decode_init(), video_decode_example(), vorbis_encode_init(), vp8_decode_frame(), vp8_encode(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::sub_id

Some codecs need additional format info.

It is stored here. If any muxer uses this then ALL demuxers/parsers AND encoders for the specific codec MUST set it correctly otherwise stream copy breaks. In general use of this field by muxers is not recommanded.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec. (FIXME: Is this OK?)

Definition at line 1030 of file avcodec.h.

Referenced by decode_frame(), ff_mpa_decode_header(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpegvideo_extract_headers(), rv10_decode_init(), rv20_decode_picture_header(), update_context_from_thread(), and vcr2_init_sequence().

int AVCodecContext::me_method

Motion estimation algorithm used for video coding.

1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]

• encoding: MUST be set by user.
• decoding: unused

Definition at line 1039 of file avcodec.h.

Referenced by add_codec(), config(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), svq1_encode_plane(), X264_init(), and XAVS_init().

uint8_t* AVCodecContext::extradata

some codecs need / can use extradata like Huffman tables.

mjpeg: Huffman tables rv10: additional flags mpeg4: global headers (they can be in the bitstream or here) The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid prolems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness.

• encoding: Set/allocated/freed by libavcodec.
• decoding: Set/allocated/freed by user.

Definition at line 1052 of file avcodec.h.

Referenced by a64_write_header(), a64_write_packet(), a64multi_encode_frame(), a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_init(), aac_encode_init(), add_av_stream1(), adpcm_decode_init(), adts_write_header(), aiff_read_header(), alac_encode_close(), alac_encode_init(), alac_set_info(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_find_stream_info(), av_mpeg4_decode_header(), av_open_input_stream(), av_parser_change(), avcodec_close(), avcodec_copy_context(), avformat_free_context(), avi_read_header(), bfi_decode_frame(), bfi_read_header(), concatenate_packet(), cook_decode_init(), decode_ext_header(), decode_header_trees(), decode_init(), decode_stream_header(), dump_extradata(), dvbsub_init_decoder(), encode_close(), encode_end(), encode_ext_header(), encode_init(), extract_mpeg4_header(), Faac_encode_close(), Faac_encode_init(), ff_cmap_read_palette(), ff_flac_is_extradata_valid(), ff_flac_write_header(), ff_h263_decode_frame(), ff_h264_decode_extradata(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_rm_read_mdpr_codecdata(), ffm_read_header(), ffm_write_header(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flic_read_header(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_attachment(), get_codec_data(), h264_mp4toannexb_filter(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), libspeex_decode_init(), matroska_read_header(), mkv_write_block(), mkv_write_codecprivate(), mov_read_extradata(), mov_read_glbl(), mov_read_smi(), mov_read_strf(), mov_read_wave(), mov_write_extradata_tag(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), MPV_encode_end(), mtv_read_header(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_encode_close(), oggvorbis_encode_init(), oma_read_header(), parse_fmtp_config(), parse_media_type(), parse_mpeg1waveformatex(), parse_packed_headers(), put_audio_specific_config(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_audio_mux_element(), read_extra_header(), read_gab2_sub(), read_header(), read_kuki_chunk(), read_specific_config(), rl2_decode_init(), rl2_read_header(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), smacker_read_header(), speex_header(), svq3_decode_init(), svq3_parse_packet(), theora_header(), transcode(), tta_decode_init(), tta_read_header(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), X264_close(), X264_init(), XAVS_close(), XAVS_init(), yop_decode_init(), and yop_read_header().

int AVCodecContext::extradata_size

Definition at line 1053 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_init(), aac_encode_init(), add_av_stream1(), adpcm_decode_init(), adts_write_header(), aiff_read_header(), alac_decode_init(), alac_encode_close(), alac_encode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_find_stream_info(), av_mpeg4_decode_header(), av_parser_change(), avcodec_copy_context(), avi_read_header(), bfi_decode_frame(), bfi_read_header(), concatenate_packet(), cook_decode_init(), decode_ext_header(), decode_header_trees(), decode_init(), decode_stream_header(), dump_extradata(), dvbsub_init_decoder(), encode_close(), encode_ext_header(), encode_init(), extract_mpeg4_header(), Faac_encode_init(), ff_cmap_read_palette(), ff_flac_is_extradata_valid(), ff_flac_write_header(), ff_h263_decode_frame(), ff_h264_decode_extradata(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_rtp_send_aac(), ffm_read_header(), ffm_write_header(), flac_encode_close(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flic_read_header(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_attachment(), get_codec_data(), h264_mp4toannexb_filter(), h264_parse(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), latm_decode_audio_specific_config(), latm_decode_init(), libspeex_decode_init(), matroska_read_header(), mkv_write_block(), mkv_write_codecprivate(), mov_read_extradata(), mov_read_glbl(), mov_read_smi(), mov_read_strf(), mov_read_wave(), mov_write_extradata_tag(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), mtv_read_header(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_encode_init(), oma_read_header(), parse_fmtp_config(), parse_media_type(), parse_packed_headers(), put_audio_specific_config(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_extra_header(), read_header(), read_kuki_chunk(), read_packet(), read_specific_config(), rl2_decode_init(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), sdp_parse_fmtp_config_h264(), smacker_read_header(), speex_header(), svq3_decode_init(), svq3_parse_packet(), theora_header(), transcode(), tta_decode_init(), tta_read_header(), vc1_decode_init(), vc1t_read_header(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), X264_init(), XAVS_init(), and yop_read_header().

AVRational AVCodecContext::time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1.

• encoding: MUST be set by user.
• decoding: Set by libavcodec.

Definition at line 1063 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_video_stream(), av_find_stream_info(), av_write_header(), avcodec_get_context_defaults2(), avcodec_string(), avi_write_header(), avs_read_packet(), cmv_process_header(), compute_frame_duration(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), config(), dc1394_read_common(), decode_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), decode_vop_header(), dirac_header(), do_audio_out(), do_video_out(), do_video_stats(), dump_stream_format(), dv_extract_video_info(), ea_read_header(), encode_ext_header(), encode_init(), estimate_best_b_count(), fbdev_read_header(), ff_dirac_schro_get_video_format_idx(), ff_flv_encode_picture_header(), ff_h261_encode_picture_header(), ff_h263_show_pict_info(), ff_h264_decode_init(), ff_parse_specific_params(), ff_rate_control_init(), ff_rate_estimate_qscale(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), ff_set_mpeg4_time(), ff_vbv_update(), ff_vdpau_mpeg4_decode_picture(), ff_xvid_rate_control_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), flv_write_header(), gif_write_video(), grab_read_header(), h261_decode_picture_header(), h263_decode_picture_header(), h263_encode_picture_header(), init_pass2(), libdirac_decode_frame(), libdirac_encode_init(), libschroedinger_encode_init(), libschroedinger_handle_first_access_unit(), matroska_read_header(), mkv_write_tracks(), modify_qscale(), mov_get_dv_codec_tag(), mov_write_header(), mov_write_uuidprof_tag(), mpeg4_encode_gop_header(), mpeg4_encode_picture_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), mpegts_write_header(), mpegvideo_extract_headers(), mpegvideo_parse(), MPV_encode_init(), MPV_encode_picture(), mxf_write_header(), new_audio_stream(), new_video_stream(), ogg_write_header(), oggvorbis_encode_frame(), ogm_dshow_header(), ogm_header(), opt_input_file(), opt_target(), output_packet(), parse_ffconfig(), parse_forced_key_frames(), parse_source_parameters(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_redv(), r3d_seek(), rm_write_header(), rtp_write_header(), set_frame_distances(), show_stream(), swf_read_packet(), swf_write_header(), tb_unreliable(), tgq_decode_init(), tgv_decode_init(), theora_header(), tqi_decode_init(), transcode(), txd_read_header(), update_context_from_thread(), v4l2_read_header(), vaapi_mpeg4_start_frame(), vfw_read_header(), video_encode_example(), vp8_init(), write_audio_frame(), write_trailer(), write_video_frame(), x11grab_read_header(), X264_init(), and XAVS_init().

int AVCodecContext::width

picture width / height.

• encoding: MUST be set by user.
• decoding: Set by libavcodec. Note: For compatibility it is possible to set this instead of coded_width/height before decoding.

Definition at line 1073 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_video_stream(), alloc_blocks(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), aura_decode_init(), av_mpeg4_decode_header(), av_write_header(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avs_read_packet(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bmp_decode_frame(), bmp_encode_frame(), cdg_decode_init(), cin_read_header(), cinepak_decode(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), common_init(), common_init_after_header(), compute_status(), config(), cyuv_decode_init(), dc1394_read_common(), decode_13(), decode_frame(), decode_frame_byterun1(), decode_frame_header(), decode_frame_ilbm(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_write_header(), do_video_out(), do_video_stats(), draw_char(), dump_stream_format(), dv_extract_video_info(), dv_write_pack(), dvvideo_init_encoder(), dxa_read_header(), ea_read_header(), encode_frame(), encode_init(), encode_picture_ls(), erase_screen(), escape124_decode_frame(), escape124_decode_init(), estimate_best_b_count(), execute_code(), fbdev_read_header(), ff_ccitt_unpack(), ff_create_schro_frame(), ff_dirac_schro_get_video_format_idx(), ff_dnxhd_find_cid(), ff_dv_codec_profile(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rm_read_mdpr_codecdata(), ff_rv34_decode_init(), ff_sauce_read(), ffm_read_header(), ffm_write_header(), fill_picture_parameters(), film_read_header(), find_stream_in_feed(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), fourxm_read_header(), frame_start(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_write_header(), gif_write_video(), grab_read_header(), halfpel_interpol(), has_codec_parameters(), hscroll(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), indeo3_decode_init(), init(), init_bundles(), init_slice_contexts(), ipmovie_read_header(), ipvideo_decode_init(), ipvideo_decode_opcodes(), ir2_decode_frame(), iv_decode_frame(), ivf_write_header(), lag_decode_frame(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_decode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), matroska_read_header(), mimic_decode_frame(), mkv_write_tracks(), mm_decode_intra(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), movie_init(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_read_changes_map(), mpegvideo_extract_headers(), MPV_encode_init(), msrle_decode_frame(), msrle_decode_pal4(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_video(), opt_input_file(), output_packet(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture_segment(), parse_presentation_segment(), pcx_decode_frame(), pcx_encode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), print_report(), ptx_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_packet(), read_header(), read_packet(), read_seek(), receive_frame(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), sp5x_decode_frame(), str_read_packet(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tiff_decode_tag(), tm2_decode_blocks(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion1_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), v4l2_read_header(), vb_decode_framedata(), vc1_decode_init(), vc1_decode_sequence_header(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), vmd_decode(), vp3_decode_init(), vp6_parse_header(), vp8_decode(), vp8_init(), wc3_read_header(), write_streamheader(), write_trailer(), write_video_frame(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xan_wc3_output_pixel_run(), XAVS_init(), xiph_parse_fmtp_pair(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_read_header(), yuv4_read_packet(), and zmbv_me().

int AVCodecContext::height

Definition at line 1073 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_video_stream(), alloc_blocks(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), av_mpeg4_decode_header(), av_write_header(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avs_read_packet(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bmp_decode_frame(), bmp_encode_frame(), cdg_decode_init(), cin_read_header(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), common_init(), common_init_after_header(), compute_status(), config(), cyuv_decode_init(), dc1394_read_common(), decode_13(), decode_frame(), decode_frame_byterun1(), decode_frame_header(), decode_frame_ilbm(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_block(), decode_p_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_write_header(), do_video_out(), do_video_stats(), dump_stream_format(), dv_extract_video_info(), dv_write_pack(), dvvideo_init_encoder(), dxa_read_header(), ea_read_header(), encode_frame(), encode_init(), encode_picture_ls(), erase_screen(), escape124_decode_init(), estimate_best_b_count(), execute_code(), fbdev_read_header(), ff_create_schro_frame(), ff_dirac_schro_get_video_format_idx(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_dv_codec_profile(), ff_dxva2_common_end_frame(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rm_read_mdpr_codecdata(), ff_rv34_decode_init(), ff_sauce_read(), ff_vaapi_common_end_frame(), ff_vdpau_h264_picture_complete(), ff_vdpau_mpeg4_decode_picture(), ff_vdpau_mpeg_picture_complete(), ff_vdpau_vc1_decode_picture(), ffm_read_header(), ffm_write_header(), fill_picture_parameters(), film_read_header(), find_stream_in_feed(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), flip(), fourxm_read_header(), frame_start(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_write_header(), gif_write_video(), grab_read_header(), gxf_find_lines_index(), gxf_write_header(), gxf_write_mpeg_auxiliary(), halfpel_interpol(), hscroll(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), indeo3_decode_init(), init(), init_bundles(), init_slice_contexts(), ipmovie_read_header(), ipvideo_decode_init(), ipvideo_decode_opcodes(), ir2_decode_frame(), iv_decode_frame(), ivf_write_header(), lag_decode_frame(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_decode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), matroska_read_header(), mimic_decode_frame(), mkv_write_tracks(), mm_decode_inter(), mm_decode_intra(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_init(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_read_changes_map(), mpegvideo_extract_headers(), MPV_encode_init(), msrle_decode_8_16_24_32(), msrle_decode_frame(), msrle_decode_pal4(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_video(), opt_input_file(), output_packet(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture_segment(), parse_presentation_segment(), pcx_decode_frame(), pcx_encode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), prepare_avpic(), print_report(), ptx_decode_frame(), qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2n4bpp(), qtrle_decode_32bpp(), qtrle_decode_8bpp(), qtrle_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_packet(), read_header(), read_packet(), read_seek(), receive_frame(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), sp5x_decode_frame(), str_read_packet(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tiff_decode_tag(), tm2_decode_blocks(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), v4l2_read_header(), vb_decode_framedata(), vc1_decode_init(), vc1_decode_sequence_header(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), vmd_decode(), vp3_decode_init(), vp3_draw_horiz_band(), vp6_parse_header(), vp8_decode(), vp8_init(), wc3_read_header(), write_streamheader(), write_trailer(), write_video_frame(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_decode_frame(), XAVS_init(), xiph_parse_fmtp_pair(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_read_header(), yuv4_read_packet(), and zmbv_me().

int AVCodecContext::gop_size

the number of pictures in a group of pictures, or 0 for intra_only

• encoding: Set by user.

• decoding: unused

Definition at line 1082 of file avcodec.h.

Referenced by add_av_stream(), add_video_stream(), config(), encode_init(), ffm_read_header(), ffm_write_header(), flashsv_encode_frame(), libdirac_encode_init(), libschroedinger_encode_init(), MPV_encode_init(), mxf_get_mpeg2_codec_ul(), new_video_stream(), parse_ffconfig(), qtrle_encode_frame(), roq_encode_frame(), svq1_encode_frame(), video_encode_example(), vp8_init(), X264_init(), and XAVS_init().

enum PixelFormat AVCodecContext::pix_fmt

Pixel format, see PIX_FMT_xxx.

May be set by the demuxer if known from headers. May be overriden by the decoder if it knows better.

• encoding: Set by user.
• decoding: Set by user if known, overridden by libavcodec if known

Definition at line 1091 of file avcodec.h.

Referenced by aasc_decode_init(), add_video_stream(), aura_decode_init(), av_find_stream_info(), avcodec_align_dimensions(), avcodec_align_dimensions2(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), avcodec_string(), avs_decode_init(), bethsoftvid_decode_init(), bfi_decode_init(), bfi_read_header(), bmp_decode_frame(), bmp_encode_frame(), bmp_encode_init(), cdg_decode_init(), choose_pixel_fmt(), cinepak_decode_init(), cinvideo_decode_init(), cmv_decode_init(), config(), copy_frame(), cyuv_decode_init(), dc1394_read_common(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_slice_header(), dnxhd_decode_frame(), dnxhd_encode_init(), do_video_out(), dv_extract_video_info(), dvvideo_init_encoder(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_lossless(), encode_picture_ls(), escape124_decode_init(), estimate_best_b_count(), fbdev_read_header(), ff_cavs_init(), ff_create_schro_frame(), ff_dv_codec_profile(), ff_h263_decode_init(), ff_mjpeg_decode_sof(), ff_mjpeg_encode_picture_header(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rv34_decode_init(), ff_vp56_init(), ffm_read_header(), ffm_write_header(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), gif_decode_frame(), gif_write_header(), grab_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), gxf_write_umf_media_mpeg(), h261_decode_init(), has_codec_parameters(), idcin_decode_init(), indeo3_decode_init(), init(), init_decoder(), ipvideo_decode_init(), ir2_decode_init(), jpeg_put_comments(), lag_decode_frame(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_decode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), load_input_picture(), mimic_decode_frame(), mm_decode_init(), mov_get_dv_codec_tag(), mov_get_rawvideo_codec_tag(), mp_decode_init(), MPV_common_init(), MPV_encode_init(), msrle_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), mtv_read_header(), mxf_parse_structural_metadata(), new_video_stream(), open_video(), opt_input_file(), pam_encode_frame(), parse_h264_sdp_line(), parse_source_parameters(), pcx_decode_frame(), pcx_encode_frame(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), ptx_decode_frame(), qtrle_decode_init(), qtrle_encode_frame(), qtrle_encode_init(), query_formats(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), rawvideo_read_packet(), read_header(), rl2_decode_init(), roq_decode_frame(), roq_decode_init(), rpza_decode_init(), rv10_decode_init(), seqvideo_decode_init(), SetSchroChromaFormat(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_init(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_frame(), svq3_decode_init(), targa_encode_frame(), tgq_decode_init(), tgv_decode_init(), tiff_decode_tag(), tmv_read_header(), tqi_decode_init(), transcode(), truemotion1_decode_header(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), v4l2_read_header(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vfw_read_header(), vid_read_header(), video_encode_example(), vmdvideo_decode_init(), vp3_decode_init(), vp8_decode_init(), vp8_init(), vqa_decode_init(), write_header(), write_video_frame(), x11grab_read_header(), X264_init(), xan_decode_init(), xiph_parse_fmtp_pair(), yop_decode_init(), yuv4_read_header(), and yuv4_read_packet().

int AVCodecContext::rate_emu

Frame rate emulation.

If not zero, the lower layer (i.e. format handler) has to read frames at native frame rate.

• encoding: Set by user.
• decoding: unused

Definition at line 1099 of file avcodec.h.

void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[4], int y, int type, int height)

If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

It improves cache usage. Not all codecs can do that. You must check the codec capabilities beforehand. When multithreading is used, it may be called from multiple threads at the same time; threads might draw different parts of the same AVFrame, or multiple AVFrames, and there is no guarantee that slices will be drawn in order. The function is also used by hardware acceleration APIs. It is called at least once during frame decoding to pass the data needed for hardware render. In that mode instead of pixel data, AVFrame points to a structure specific to the acceleration API. The application reads the structure and can change some fields to indicate progress or mark state.

• encoding: unused
• decoding: Set by user.

  Parameters:

  	height	the height of the slice
  	y	the y position of the slice
  	type	1->top field, 2->bottom field, 3->frame
  	offset	offset into the AVFrame.data from which the slice should be read

Referenced by ff_draw_horiz_band(), ff_init_block_index(), MPV_decode_mb_internal(), update_context_from_user(), and vp3_draw_horiz_band().

int AVCodecContext::sample_rate

samples per second

Definition at line 1129 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), add_audio_stream(), add_av_stream(), add_codec(), adx_decode_header(), adx_encode_header(), aea_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_init(), amr_decode_fix_avctx(), amr_read_header(), apc_read_header(), ape_read_header(), atrac3_decode_init(), au_read_header(), audio_decode_frame(), audio_encode_example(), audio_read_header(), audio_read_packet(), audio_write_header(), av_find_stream_info(), av_write_header(), avcodec_string(), avisynth_read_header(), bfi_read_header(), cdata_read_header(), choose_sample_rate(), cin_read_header(), compute_frame_duration(), compute_status(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_wave_header(), do_audio_out(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), encode_init(), Faac_encode_init(), ff_aac_ac3_parse(), ff_flac_parse_streaminfo(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_specific_params(), ff_psy_preprocess_init(), ff_raw_read_header(), ff_rtp_get_codec_info(), ff_wma_init(), ffm_read_header(), ffm_write_header(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_encode_init(), flac_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), flv_write_header(), fourxm_read_header(), g722_init(), g726_init(), get_aiff_header(), get_audio_clock(), get_audio_flags(), get_audio_frame_size(), get_best_header(), get_bit_rate(), get_codec_data(), get_sindex(), gsm_init(), gxf_write_header(), has_codec_parameters(), idcin_read_header(), iff_read_header(), init_bitstream_params(), ipmovie_read_header(), iss_read_header(), libgsm_init(), libspeex_decode_init(), lxf_read_header(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), mov_read_trak(), mov_write_esds_tag(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_decompress(), MP3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_write_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_wav_common(), mxg_read_header(), new_audio_stream(), nsv_read_chunk(), nut_read_header(), ogg_write_header(), oggvorbis_encode_frame(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), open_audio(), opt_input_file(), output_packet(), parse_adts_frame_header(), parse_ffconfig(), pcm_bluray_parse_header(), pcm_read_seek(), psy_3gpp_init(), qcp_read_header(), qdm2_decode_init(), r3d_read_reda(), read_desc_chunk(), read_header(), read_major_sync(), read_specific_config(), rl2_read_header(), rm_read_audio_stream_info(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_parse_open(), rtp_write_header(), rv10_write_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), smacker_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), spdif_read_packet(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), synchronize_audio(), thp_read_header(), tmv_read_header(), transcode(), tta_decode_init(), tta_read_header(), twin_decode_frame(), twin_decode_init(), validate_options(), vid_read_header(), vid_read_packet(), video_audio_display(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_header(), vqf_read_header(), wc3_read_header(), wmavoice_decode_init(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), xa_read_header(), and yop_read_header().

int AVCodecContext::channels

number of audio channels

Definition at line 1130 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), ac3_decode_init(), add_audio_stream(), add_av_stream(), add_codec(), adpcm_decode_frame(), adpcm_decode_init(), adx_decode_frame(), adx_decode_header(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), aea_read_header(), aiff_write_header(), alac_decode_init(), alac_encode_frame(), alac_encode_init(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), apc_read_header(), ape_decode_frame(), ape_decode_init(), ape_read_header(), apply_window_and_mdct(), atrac1_decode_init(), atrac3_decode_init(), au_read_header(), au_read_packet(), audio_decode_frame(), audio_encode_example(), audio_read_header(), audio_write_header(), av_find_stream_info(), av_write_header(), avcodec_open(), avcodec_string(), avisynth_read_header(), bfi_read_header(), cdata_read_header(), cin_read_header(), compute_status(), construct_perm_table(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_decode_init(), dec_gain(), decode_extension_payload(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_wave_header(), decoder_init(), do_audio_out(), dpcm_decode_init(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), encode_init(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_audio_interleave_init(), ff_flac_parse_streaminfo(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_psy_init(), ff_psy_preprocess(), ff_psy_preprocess_end(), ff_psy_preprocess_init(), ff_raw_read_header(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_wma_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_encode_init(), flic_read_header(), flv_read_packet(), flv_write_header(), fourxm_read_header(), g722_init(), g726_init(), get_aiff_header(), get_audio_clock(), get_audio_flags(), get_audio_frame_size(), get_best_header(), get_bit_rate(), get_codec_data(), get_sindex(), gsm_init(), gxf_write_header(), has_codec_parameters(), idcin_read_header(), iff_read_header(), iff_read_packet(), imc_decode_init(), imdct_output(), init_bitstream_params(), init_mdct_win(), init_sample_buffers(), ipmovie_read_header(), iss_read_header(), iss_read_packet(), lame_window_init(), libgsm_init(), libspeex_decode_frame(), libspeex_decode_init(), lxf_read_header(), mace_decode_frame(), mace_decode_init(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), mov_read_dac3(), mov_write_audio_tag(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_compress(), mp3_header_decompress(), MP3lame_encode_init(), MPA_encode_init(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxg_read_header(), new_audio_stream(), nsv_read_chunk(), nut_read_header(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), open_audio(), opt_input_file(), output_configure(), output_packet(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_encode_init(), pcm_read_seek(), psy_3gpp_init(), psy_3gpp_window(), put_audio_specific_config(), qcp_read_header(), qdm2_decode_init(), r3d_read_red1(), ra144_encode_init(), raw_read_packet(), read_and_decode_spectrum(), read_channel_data(), read_desc_chunk(), read_frame_data(), read_header(), read_packet(), read_restart_header(), read_specific_config(), revert_channel_correlation(), rl2_read_header(), rm_read_audio_stream_info(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_write_packet(), rv10_write_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), smacker_read_header(), smka_decode_init(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), synchronize_audio(), thp_read_header(), tmv_read_header(), transcode(), tta_decode_init(), tta_read_header(), twin_decode_frame(), twin_decode_init(), update_sample_display(), validate_options(), vid_read_header(), vid_read_packet(), video_audio_display(), vmd_read_header(), vmdaudio_decode_init(), vmdaudio_loadsound(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vorbis_parse_setup_hdr_residues(), vqf_read_header(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_decode_init(), wc3_read_header(), write_audio_frame(), write_compressed_frame(), write_frame_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), wv_unpack_mono(), wv_unpack_stereo(), xa_read_header(), xa_read_packet(), and yop_read_header().

enum AVSampleFormat AVCodecContext::sample_fmt

audio sample format

• encoding: Set by user.

• decoding: Set by libavcodec. sample format

Definition at line 1137 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_init(), add_audio_stream(), adpcm_decode_init(), adx_decode_init(), alac_decode_frame(), alac_encode_init(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), audio_decode_frame(), avcodec_get_context_defaults2(), avcodec_open(), avcodec_string(), choose_sample_fmt(), cinaudio_decode_init(), cook_decode_init(), dca_decode_init(), decode_frame(), decode_init(), do_audio_out(), dpcm_decode_init(), eightsvx_decode_init(), ffm_read_header(), ffm_write_header(), flac_decode_init(), flac_encode_init(), flic_read_header(), g722_init(), g726_init(), gsm_init(), has_codec_parameters(), imc_decode_init(), libgsm_init(), libspeex_decode_init(), mace_decode_init(), mkv_write_tracks(), mlp_parse(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), opt_input_file(), output_data(), output_packet(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), qcelp_decode_init(), qdm2_decode_init(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_major_sync(), roq_dpcm_encode_init(), shorten_decode_init(), sipr_decoder_init(), smka_decode_init(), transcode(), truespeech_decode_init(), tta_decode_init(), twin_decode_init(), vmdaudio_decode_init(), vorbis_decode_init(), wavpack_decode_block(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), and ws_snd_decode_init().

int AVCodecContext::frame_size

Samples per packet, initialized when calling 'init'.

Definition at line 1143 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_init(), ac3_encode_init(), adx_encode_frame(), adx_encode_init(), aiff_read_header(), alac_encode_frame(), alac_encode_init(), alac_entropy_coder(), alac_linear_predictor(), alac_stereo_decorrelation(), amr_decode_fix_avctx(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), audio_encode_example(), av_find_stream_info(), avcodec_decode_audio3(), calc_predictor_params(), create_audio_stream(), decode_init(), decoder_init(), do_audio_out(), dprint_compression_options(), encode_frame(), encode_init(), encode_superframe(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_parse_specific_params(), ff_psy_preprocess(), ffm_read_header(), ffm_write_header(), flac_encode_frame(), flac_encode_init(), flac_parse(), g726_init(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_best_header(), gsm_decode_frame(), gsm_init(), has_codec_parameters(), init_frame(), init_sample_buffers(), libgsm_init(), libspeex_decode_frame(), libspeex_decode_init(), mlp_parse(), mov_read_trak(), mov_write_audio_tag(), mov_write_header(), MP3lame_encode_frame(), MP3lame_encode_init(), mp_decode_frame(), MPA_encode_init(), mpegaudio_parse(), mpegts_write_header(), oggvorbis_encode_frame(), oggvorbis_encode_init(), open_audio(), output_packet(), pcm_encode_init(), ra144_encode_init(), rdt_parse_sdp_line(), read_major_sync(), rm_write_header(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), rtp_write_header(), rv10_write_header(), speex_header(), speex_packet(), swf_write_audio(), swf_write_header(), transcode(), vorbis_decode_init(), vorbis_encode_frame(), vorbis_encode_init(), and write_frame_header().

int AVCodecContext::frame_number

audio or video frame number

Definition at line 1144 of file avcodec.h.

Referenced by aac_encode_frame(), avcodec_decode_audio3(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_open(), bfi_decode_frame(), cook_decode_frame(), decode_frame(), decode_packet(), eightsvx_decode_frame(), flashsv_encode_frame(), h261_decode_frame(), http_prepare_data(), mpeg_decode_frame(), output_packet(), qtrle_encode_frame(), rv10_decode_frame(), svq1_encode_end(), svq1_encode_frame(), twin_decode_frame(), update_context_from_user(), and warn_insufficient_frame_quality().

int AVCodecContext::real_pict_num

Returns the real picture number of previous encoded frame.

Definition at line 1146 of file avcodec.h.

int AVCodecContext::delay

Number of frames the decoded output will be delayed relative to the encoded input.

• encoding: Set by libavcodec.
• decoding: unused

Definition at line 1155 of file avcodec.h.

Referenced by MPV_encode_init().

float AVCodecContext::qcompress

amount of qscale change between easy & hard scenes (0.0-1.0)

Definition at line 1158 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), get_qscale(), vp8_init(), X264_init(), and XAVS_init().

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 1159 of file avcodec.h.

Referenced by add_codec(), ff_rate_control_init(), ff_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), X264_init(), and XAVS_init().

int AVCodecContext::qmin

minimum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 1166 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), encode_thread(), ff_init_qscale_tab(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), parse_ffconfig(), update_qscale(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::qmax

maximum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 1173 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dnxhd_init_qmat(), dnxhd_init_rc(), encode_thread(), ff_init_qscale_tab(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), parse_ffconfig(), update_qscale(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

• encoding: Set by user.

• decoding: unused

Definition at line 1180 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), parse_ffconfig(), X264_init(), and XAVS_init().

int AVCodecContext::max_b_frames

maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.

• encoding: Set by user.
• decoding: unused

Definition at line 1188 of file avcodec.h.

Referenced by add_video_stream(), compute_pkt_fields2(), config(), decode_sequence_header_adv(), estimate_best_b_count(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), vaapi_vc1_start_frame(), vc1_decode_init(), vc1_decode_sequence_header(), vc1_parse_frame_header(), video_encode_example(), X264_init(), and XAVS_init().

float AVCodecContext::b_quant_factor

qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1197 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), and XAVS_init().

int AVCodecContext::rc_strategy

obsolete FIXME remove

Definition at line 1200 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_control_uninit(), and ff_rate_estimate_qscale().

int AVCodecContext::b_frame_strategy

Definition at line 1203 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), select_input_picture(), X264_init(), and XAVS_init().

int AVCodecContext::hurry_up

hurry up amount

• encoding: unused
• decoding: Set by user.

1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header

Deprecated:

Deprecated in favor of skip_idct and skip_frame.

Definition at line 1211 of file avcodec.h.

Referenced by decode_chunks(), ff_h263_decode_frame(), ff_rv34_decode_frame(), h261_decode_frame(), MPV_frame_start(), svq1_decode_frame(), svq3_decode_frame(), update_context_from_user(), and vc1_decode_frame().

struct AVCodec* AVCodecContext::codec [read]

Definition at line 1213 of file avcodec.h.

Referenced by a64_write_header(), a64_write_packet(), a64multi_init_encoder(), adpcm_decode_frame(), adpcm_decode_init(), av_find_stream_info(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio3(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_flush_buffers(), avcodec_open(), close_connection(), common_end(), common_init(), config(), context_to_name(), decode(), decode_chunks(), decode_end(), decode_frame(), decode_init(), decode_nal_units(), decode_slice_header(), do_audio_out(), dpcm_decode_frame(), dpcm_decode_init(), eightsvx_decode_init(), encode_init(), execute_decode_slices(), ff_draw_horiz_band(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_thread_get_buffer(), ff_thread_init(), ff_vdpau_mpeg4_decode_picture(), ff_vp56_init(), ff_wma_init(), field_end(), frame_thread_free(), frame_thread_init(), frame_worker_thread(), g726_init(), h261_decode_init(), init(), libgsm_init(), mov_write_video_tag(), mpeg_decode_init(), mpeg_get_pixelformat(), MPV_encode_init(), MPV_frame_end(), open_parser(), output_packet(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), receive_frame(), show_stream(), submit_packet(), svq1_decode_init(), svq3_decode_init(), try_decode_frame(), update_context_from_thread(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vp56_add_predictors_dc(), vp56_decode_4mv(), vp6_decode_init(), wma_decode_init(), write_frame(), and xan_decode_frame().

void* AVCodecContext::priv_data

Definition at line 1215 of file avcodec.h.

Referenced by a64multi_close_encoder(), a64multi_encode_frame(), a64multi_init_encoder(), aac_decode_close(), aac_decode_frame_int(), aac_decode_init(), aac_encode_end(), aac_encode_frame(), aac_encode_init(), aasc_decode_end(), aasc_decode_frame(), aasc_decode_init(), ac3_decode_end(), ac3_decode_frame(), ac3_decode_init(), ac3_encode_close(), ac3_encode_frame(), ac3_encode_init(), adpcm_decode_frame(), adpcm_decode_init(), adx_decode_frame(), adx_encode_frame(), alac_decode_close(), alac_decode_frame(), alac_decode_init(), alac_encode_close(), alac_encode_frame(), alac_encode_init(), allocate_buffers(), allocate_tables(), amrnb_decode_frame(), amrnb_decode_init(), amrwb_decode_frame(), amrwb_decode_init(), ape_decode_close(), ape_decode_frame(), ape_decode_init(), ape_flush(), apply_window_and_mdct(), atrac1_decode_end(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_close(), atrac3_decode_frame(), atrac3_decode_init(), aura_decode_end(), aura_decode_frame(), aura_decode_init(), avcodec_close(), avcodec_copy_context(), avcodec_get_context_defaults3(), avcodec_open(), avs_decode_frame(), bethsoftvid_decode_end(), bethsoftvid_decode_frame(), bethsoftvid_decode_init(), bfi_decode_close(), bfi_decode_frame(), bfi_decode_init(), bmp_decode_end(), bmp_decode_frame(), bmp_decode_init(), bmp_encode_frame(), bmp_encode_init(), cavs_decode_frame(), cavs_flush(), cdg_decode_end(), cdg_decode_frame(), cdg_decode_init(), cinaudio_decode_frame(), cinaudio_decode_init(), cinepak_decode_end(), cinepak_decode_frame(), cinepak_decode_init(), cinvideo_decode_end(), cinvideo_decode_frame(), cinvideo_decode_init(), close_decoder(), cmv_decode_end(), cmv_decode_frame(), cmv_decode_init(), codec_reinit(), codecctl_int(), commit_bitstream_and_slice_buffer(), common_end(), common_init(), common_init_after_header(), cook_decode_close(), cook_decode_frame(), cook_decode_init(), copy_frame(), cyuv_decode_end(), cyuv_decode_frame(), cyuv_decode_init(), dca_decode_end(), dca_decode_frame(), dca_decode_init(), decode(), decode_chunks(), decode_close(), decode_end(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_init_thread_copy(), decode_packet(), decode_slice(), decode_tag(), decode_update_thread_context(), decoder_init(), determine_bitrate(), display_end_segment(), dnxhd_calc_bits_thread(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_encode_thread(), dnxhd_mb_var_thread(), dnxhd_write_header(), dpcm_decode_frame(), dpcm_decode_init(), draw_char(), dv_decode_video_segment(), dv_encode_video_segment(), dvbsub_close_decoder(), dvbsub_decode(), dvbsub_display_end_segment(), dvbsub_encode(), dvbsub_init_decoder(), dvbsub_parse_clut_segment(), dvbsub_parse_display_definition_segment(), dvbsub_parse_object_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvvideo_close(), dvvideo_init(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_close(), encode_end(), encode_frame(), encode_init(), encode_init_ls(), encode_nals(), encode_picture_lossless(), encode_picture_ls(), encode_superframe(), end_frame(), erase_line(), erase_screen(), escape124_decode_close(), escape124_decode_frame(), escape124_decode_init(), execute_code(), Faac_encode_close(), Faac_encode_frame(), Faac_encode_init(), ff_cavs_end(), ff_cavs_init(), ff_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_end(), ff_h264_decode_init(), ff_mjpeg_decode_end(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), ff_mpeg_flush(), ff_mpeg_update_thread_context(), ff_msmpeg4_decode_init(), ff_pnm_end(), ff_pnm_init(), ff_rv34_decode_end(), ff_rv34_decode_frame(), ff_rv34_decode_init(), ff_vdpau_h264_picture_complete(), ff_vdpau_h264_picture_start(), ff_vdpau_h264_set_reference_frames(), ff_vdpau_vc1_decode_picture(), ff_vp56_decode_frame(), ff_vp56_free(), ff_vp56_init(), ff_wma_end(), ff_wma_init(), fill_slice(), fill_slice_long(), flac_decode_close(), flac_decode_frame(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv_decode_end(), flashsv_decode_frame(), flashsv_decode_init(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), flic_decode_end(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_decode_init(), flush(), flush_dpb(), frame_thread_free(), frame_thread_init(), g722_close(), g722_init(), g726_decode_frame(), g726_init(), get_stats(), gif_decode_close(), gif_decode_frame(), gif_decode_init(), gif_encode_close(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gsm_decode_block(), h261_decode_end(), h261_decode_frame(), h261_decode_init(), hscroll(), idcin_decode_end(), idcin_decode_frame(), idcin_decode_init(), imc_decode_close(), imc_decode_frame(), imc_decode_init(), indeo3_decode_end(), indeo3_decode_frame(), indeo3_decode_init(), init(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_end(), ir2_decode_frame(), ir2_decode_init(), iv_decode_frame(), lag_decode_end(), lag_decode_frame(), lag_decode_init(), latm_decode_frame(), latm_decode_init(), libdirac_decode_close(), libdirac_decode_frame(), libdirac_decode_init(), libdirac_encode_close(), libdirac_encode_frame(), libdirac_encode_init(), libgsm_close(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), libopenjpeg_decode_close(), libopenjpeg_decode_frame(), libopenjpeg_decode_init(), libschroedinger_decode_close(), libschroedinger_decode_frame(), libschroedinger_decode_init(), libschroedinger_encode_close(), libschroedinger_encode_frame(), libschroedinger_encode_init(), libschroedinger_flush(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libspeex_decode_close(), libspeex_decode_frame(), libspeex_decode_init(), log_encoder_error(), mace_decode_frame(), mdec_common_init(), mimic_decode_end(), mimic_decode_frame(), mimic_decode_init(), mimic_decode_update_thread_context(), mjpegb_decode_frame(), mlp_decode_init(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), MP3lame_encode_close(), MP3lame_encode_frame(), MP3lame_encode_init(), mp_decode_end(), mp_decode_frame(), mp_decode_init(), MPA_encode_frame(), MPA_encode_init(), mpc7_decode_flush(), mpc7_decode_frame(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_end(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_init(), mpeg_decode_postinit(), mpeg_decode_update_thread_context(), mpeg_get_pixelformat(), MPV_encode_end(), MPV_encode_init(), MPV_encode_picture(), msrle_decode_end(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_end(), msvideo1_decode_frame(), msvideo1_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), oggvorbis_init_encoder(), pam_encode_frame(), parse_palette_segment(), parse_picture_segment(), parse_presentation_segment(), pcm_decode_frame(), pcm_decode_init(), pcx_decode_frame(), pcx_encode_frame(), pcx_encode_init(), pcx_end(), pcx_init(), png_dec_end(), png_dec_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), ptx_decode_frame(), ptx_end(), ptx_init(), put_audio_specific_config(), qcelp_decode_frame(), qcelp_decode_init(), qdm2_decode_close(), qdm2_decode_frame(), qdm2_decode_init(), qtrle_decode_end(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), queue_frames(), ra144_decode_frame(), ra144_decode_init(), ra144_encode_close(), ra144_encode_frame(), ra144_encode_init(), ra288_decode_frame(), raw_close_decoder(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_access_unit(), read_huffman_tree(), receive_frame(), release_buffer(), render_charset(), rl2_decode_end(), rl2_decode_frame(), rl2_decode_init(), roq_decode_end(), roq_decode_frame(), roq_decode_init(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_encode_end(), roq_encode_frame(), roq_encode_init(), rpza_decode_end(), rpza_decode_frame(), rpza_decode_init(), rv10_decode_end(), rv10_decode_frame(), rv10_decode_init(), rv10_decode_packet(), rv30_decode_init(), rv40_decode_init(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), set_context_opts(), SetSchroChromaFormat(), sgi_end(), sgi_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), shorten_flush(), sipr_decode_frame(), sipr_decoder_init(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), start_frame(), submit_stats(), sunrast_decode_frame(), sunrast_end(), sunrast_init(), svq1_decode_end(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq3_decode_frame(), svq3_decode_init(), synth_frame(), synth_superframe(), targa_encode_init(), targa_end(), targa_init(), tgq_decode_end(), tgq_decode_frame(), tgq_decode_init(), tgv_decode_end(), tgv_decode_frame(), tgv_decode_init(), tiff_end(), tiff_init(), tmv_decode_close(), tmv_decode_frame(), tqi_decode_end(), tqi_decode_frame(), tqi_decode_init(), truemotion1_decode_end(), truemotion1_decode_frame(), truemotion1_decode_init(), truespeech_decode_frame(), tta_decode_close(), tta_decode_frame(), tta_decode_init(), twin_decode_close(), twin_decode_frame(), twin_decode_init(), txd_decode_frame(), txd_end(), txd_init(), ulti_decode_end(), ulti_decode_frame(), ulti_decode_init(), uninit(), update_frames(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_end_frame(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_end_frame(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_end_frame(), vaapi_vc1_start_frame(), vc1_decode_end(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vmdvideo_decode_init(), vorbis_decode_close(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp3_decode_end(), vp3_decode_frame(), vp3_decode_init(), vp3_update_thread_context(), vp56_size_changed(), vp5_decode_init(), vp6_decode_free(), vp6_decode_init(), vp8_decode(), vp8_decode_flush(), vp8_decode_frame(), vp8_decode_init(), vp8_encode(), vp8_free(), vp8_init(), vqa_decode_end(), vqa_decode_frame(), vqa_decode_init(), wavpack_decode_block(), wavpack_decode_end(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wma_decode_superframe(), wmavoice_decode_end(), wmavoice_decode_init(), wmavoice_decode_packet(), wmavoice_flush(), wmv2_decode_end(), wmv2_decode_init(), wmv2_encode_init(), X264_close(), X264_frame(), X264_init(), xan_decode_chroma(), xan_decode_end(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), XAVS_close(), XAVS_frame(), XAVS_init(), yop_decode_close(), yop_decode_frame(), and yop_decode_init().

int AVCodecContext::rtp_payload_size

Definition at line 1217 of file avcodec.h.

Referenced by encode_thread(), and MPV_encode_init().

void(* AVCodecContext::rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)

Referenced by encode_thread().

int AVCodecContext::mv_bits

Definition at line 1234 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::header_bits

Definition at line 1235 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::i_tex_bits

Definition at line 1236 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::p_tex_bits

Definition at line 1237 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::i_count

Definition at line 1238 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::p_count

Definition at line 1239 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::skip_count

Definition at line 1240 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::misc_bits

Definition at line 1241 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::frame_bits

number of bits used for the previously encoded frame

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1248 of file avcodec.h.

Referenced by aac_encode_frame(), and MPV_encode_picture().

void* AVCodecContext::opaque

Private data of the user, can be used to carry app specific stuff.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1255 of file avcodec.h.

Referenced by update_context_from_user().

char AVCodecContext::codec_name[32]

Definition at line 1257 of file avcodec.h.

Referenced by asf_write_header1(), avcodec_string(), ff_mov_read_stsd_entries(), rm_read_audio_stream_info(), and skeleton_header().

enum AVMediaType AVCodecContext::codec_type

Definition at line 1258 of file avcodec.h.

Referenced by add_audio_stream(), add_av_stream(), add_codec(), add_dstream(), add_video_stream(), adts_aac_read_header(), aea_read_header(), amr_read_header(), apc_read_header(), ape_read_header(), asf_read_header(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), au_read_header(), audio_read_header(), av_find_best_stream(), av_find_default_stream_index(), av_find_stream_info(), av_interleaved_write_frame(), av_read_packet(), av_write_header(), avcodec_get_context_defaults2(), avcodec_open(), avcodec_string(), avi_read_header(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_read_header(), avs_read_packet(), bfi_read_header(), build_feed_streams(), build_frame_code(), cdata_read_header(), check_audio_video_sub_inputs(), cin_read_header(), compute_bandwidth(), compute_frame_duration(), compute_pkt_fields2(), compute_status(), create_audio_stream(), create_stream(), daud_header(), dc1394_read_common(), decode_stream_header(), dirac_header(), do_video_stats(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_init_demux(), dv_init_mux(), dxa_read_header(), ea_read_header(), fbdev_read_header(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_specific_params(), ff_raw_audio_read_header(), ff_raw_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rtp_get_codec_info(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_header(), flac_read_header(), flic_read_header(), flv_read_metabody(), flv_write_header(), flv_write_packet(), flv_write_trailer(), fourxm_read_header(), get_aiff_header(), get_attachment(), get_bit_rate(), get_sindex(), gif_write_header(), gif_write_packet(), grab_read_header(), gxf_compare_field_nb(), gxf_interleave_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), has_codec_parameters(), http_prepare_data(), idcin_read_header(), iff_read_header(), iff_read_packet(), ipmovie_read_header(), ipod_get_codec_tag(), is_intra_only(), iss_read_header(), ivf_write_header(), lmlm4_read_header(), lxf_read_header(), matroska_read_header(), mkv_write_codecprivate(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), mov_build_index(), mov_create_chapter_track(), mov_get_codec_tag(), mov_read_hdlr(), mov_read_trak(), mov_read_trun(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_minf_tag(), mov_write_stbl_tag(), mov_write_stsd_tag(), mov_write_stts_tag(), mov_write_tkhd_tag(), mov_write_trak_tag(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), msnwc_tcp_read_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxf_write_common_fields(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_stream(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogg_read_seek(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_input_stream(), opt_input_file(), opt_target(), output_packet(), parse_ffconfig(), print_report(), pva_read_header(), qcp_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), read_desc_chunk(), read_ffserver_streams(), read_header(), read_packet(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_dts(), rm_read_header(), rm_write_header(), rm_write_packet(), roq_read_header(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rtp_write_header(), rv10_write_header(), seq_read_header(), set_codec_from_probe_data(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), sol_read_header(), sox_read_header(), spdif_read_packet(), speex_header(), srt_read_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), theora_header(), thp_read_header(), tmv_read_header(), transcode(), try_decode_frame(), tta_read_header(), txd_read_header(), v4l2_read_header(), vc1t_read_header(), vfw_read_header(), vid_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), vorbis_header(), vqf_read_header(), wc3_read_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), yop_read_header(), and yuv4_read_header().

enum CodecID AVCodecContext::codec_id

Definition at line 1259 of file avcodec.h.

Referenced by add_audio_stream(), add_av_stream(), add_video_stream(), adts_aac_read_header(), aea_read_header(), aiff_write_header(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), au_read_header(), au_read_packet(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_find_stream_info(), av_read_frame_internal(), av_read_packet(), av_write_header(), avcodec_align_dimensions2(), avcodec_open(), avcodec_string(), avi_read_header(), avi_write_header(), avi_write_trailer(), avisynth_read_header(), avs_read_packet(), bfi_read_header(), cdata_read_header(), choose_pixel_fmt(), cin_read_header(), commit_bitstream_and_slice_buffer(), compute_pkt_fields(), compute_status(), create_audio_stream(), cyuv_decode_frame(), daud_header(), dc1394_read_common(), decode_end(), decode_frame(), decode_init(), decode_mb(), decode_slice(), decode_stream_header(), dirac_header(), do_subtitle_out(), dsputil_init_mmx(), dv_extract_audio_info(), dv_init_demux(), dv_init_mux(), dxa_read_header(), ea_read_header(), encode_mb(), estimate_best_b_count(), extract_mpeg4_header(), fbdev_read_header(), ff_aac_ac3_parse(), ff_asf_parse_packet(), ff_audio_interleave_init(), ff_h264_decode_init(), ff_init_me(), ff_mjpeg_decode_frame(), ff_mjpeg_encode_picture_header(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_mpa_decode_header(), ff_parse_mpeg2_descriptor(), ff_pnm_decode_header(), ff_psy_init(), ff_raw_audio_read_header(), ff_raw_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rm_retrieve_cache(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_rv34_decode_init(), ffm_read_header(), ffm_write_header(), ffserver_opt_preset(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_header(), flac_read_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), fourxm_read_header(), get_aiff_header(), get_attachment(), get_audio_flags(), get_audio_frame_size(), get_bit_rate(), get_codec_data(), get_packet_header(), get_sindex(), grab_read_header(), gsm_decode_frame(), gsm_init(), gxf_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), has_codec_parameters(), has_decode_delay_been_guessed(), idcin_read_header(), iff_read_header(), imx_dump_header(), ipmovie_read_header(), ipod_get_codec_tag(), is_intra_only(), iss_read_header(), ivf_write_header(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), lmlm4_read_header(), lxf_read_header(), lxf_read_packet(), mace_decode_frame(), matroska_parse_block(), matroska_read_header(), mjpega_dump_header(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), mov_find_codec_tag(), mov_get_codec_tag(), mov_read_enda(), mov_read_hdlr(), mov_read_trak(), mov_read_wave(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_header(), mov_write_uuidprof_tag(), mov_write_video_tag(), mov_write_wave_tag(), movie_init(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpeg_get_pixelformat(), mpeg_mux_init(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), mpegvideo_extract_headers(), MPV_encode_init(), msnwc_tcp_read_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nuv_header(), ogg_buffer_data(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_audio(), open_input_file(), open_parser(), open_video(), output_packet(), parse(), parse_ffconfig(), parse_fmtp(), parse_media_type(), parse_mpeg1waveformatex(), pcm_decode_frame(), pcm_read_seek(), put_xiph_codecpriv(), pva_read_header(), qcp_read_header(), qdm2_parse_packet(), r3d_read_red1(), raw_read_packet(), rdt_parse_packet(), rdt_parse_sdp_line(), read_access_unit(), read_desc_chunk(), read_ffserver_streams(), read_header(), read_kuki_chunk(), read_major_sync(), read_matrix_params(), read_packet(), read_restart_header(), remove_extradata(), rl2_read_header(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_write_audio(), roq_read_header(), roq_read_packet(), rpl_read_header(), rso_read_header(), rso_read_packet(), rso_write_header(), rtp_parse_open(), rtp_parse_packet_internal(), rtp_write_header(), rtp_write_packet(), rv10_decode_init(), rv10_write_header(), sdp_parse_fmtp_config_h264(), seq_read_header(), set_codec_from_probe_data(), show_stream(), siff_parse_vbv1(), smacker_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), sp5x_decode_frame(), spdif_read_packet(), spdif_write_header(), speex_header(), srt_read_header(), str_read_packet(), stream_component_open(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_video(), tb_unreliable(), theora_header(), thp_read_header(), tmv_read_header(), transcode(), try_decode_frame(), tta_read_header(), txd_read_header(), v4l2_read_header(), vaapi_vc1_decode_slice(), validate_codec_tag(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr2_init_sequence(), vfw_read_header(), vid_read_header(), vmd_read_header(), voc_get_packet(), vorbis_header(), vqf_read_header(), wc3_read_header(), write_header(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), yop_read_header(), and yuv4_read_header().

unsigned int AVCodecContext::codec_tag

fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs. A demuxer should set this to what is stored in the field used to identify the codec. If there are multiple such fields in a container then the demuxer should choose the one which maximizes the information about the used codec. If the codec tag field in a container is larger then 32 bits then the demuxer should remap the longer ID to 32 bits with a table or other structure. Alternatively a new extra_codec_tag + size could be added but for this a clear advantage must be demonstrated first.

• encoding: Set by user, if not then the default based on codec_id will be used.
• decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1274 of file avcodec.h.

Referenced by a64multi_init_encoder(), aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), au_read_header(), av_find_stream_info(), av_write_header(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), cdata_read_header(), cin_read_header(), daud_header(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_stream_header(), dpcm_decode_frame(), dpcm_decode_init(), ea_read_header(), ff_mjpeg_decode_sos(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_rm_read_mdpr_codecdata(), ffm_read_header(), ffm_write_header(), film_read_header(), flic_read_header(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipod_get_codec_tag(), ivf_write_header(), lxf_read_header(), matroska_read_header(), mkv_write_codecprivate(), mov_find_codec_tag(), mov_get_codec_tag(), mov_get_rawvideo_codec_tag(), mov_write_hdlr_tag(), mov_write_ms_tag(), mov_write_stbl_tag(), mov_write_stsd_tag(), mp4_get_codec_tag(), mpeg_decode_frame(), mpegts_set_stream_info(), MPV_common_init(), msnwc_tcp_read_header(), new_audio_stream(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), ogm_header(), oma_read_header(), parse_ffconfig(), pmt_cb(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_header(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rso_write_header(), rv10_write_header(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), sol_read_header(), str_read_packet(), thp_read_header(), transcode(), validate_codec_tag(), vmd_read_header(), voc_write_packet(), vp3_decode_init(), wc3_read_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), and xsub_encoder_init().

int AVCodecContext::workaround_bugs

Work around bugs in encoders which sometimes cannot be detected automatically.

• encoding: Set by user
• decoding: Set by user

Definition at line 1281 of file avcodec.h.

Referenced by ff_h263_decode_init(), ff_h264_decode_init(), ff_mpeg4_set_direct_mv(), and stream_component_open().

int AVCodecContext::luma_elim_threshold

luma single coefficient elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1305 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::chroma_elim_threshold

chroma single coeff elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1312 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::strict_std_compliance

strictly follow the standard (MPEG4, .

..).

• encoding: Set by user.
• decoding: Set by user. Setting this to STRICT or higher means the encoder and decoder will generally do stupid things, whereas setting it to unofficial or lower will mean the encoder might produce output that is not supported by all spec-compliant decoders. Decoders don't differentiate between normal, unofficial and experimental (that is, they always try to decode things when they can) unless they are explicitly asked to behave stupidly (=strictly conform to the specs)

Definition at line 1326 of file avcodec.h.

Referenced by choose_pixel_fmt(), config(), decode_postinit(), encode_init(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), libgsm_init(), mov_get_codec_tag(), mp3_header_compress(), MPV_encode_init(), parse_ffconfig(), and validate_codec_tag().

float AVCodecContext::b_quant_offset

qscale offset between IP and B-frames

• encoding: Set by user.

• decoding: unused

Definition at line 1341 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

int AVCodecContext::error_recognition

Error recognization; higher values will detect more errors but may misdetect some more or less valid parts as errors.

• encoding: unused
• decoding: Set by user.

Definition at line 1349 of file avcodec.h.

Referenced by ac3_decode_frame(), decode_frame(), decode_init(), execute_decode_slices(), h261_decode_gob_header(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_slice(), MPV_frame_start(), read_specific_config(), and stream_component_open().

int(* AVCodecContext::get_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of each frame to get a buffer for it.

If pic.reference is set then the frame will be read later by libavcodec. avcodec_align_dimensions2() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16. if CODEC_CAP_DR1 is not set then get_buffer() must call avcodec_default_get_buffer() instead of providing buffers allocated by some other means. If frame multithreading is used and thread_safe_callbacks is set, it may be called from a different thread, but not from more than one at once. Does not need to be reentrant.

• encoding: unused
• decoding: Set by libavcodec, user can override.

Referenced by aura_decode_frame(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), bfi_decode_frame(), bmp_decode_frame(), cdg_decode_frame(), cmv_decode_frame(), common_init(), copy_frame(), cyuv_decode_frame(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_pic(), dnxhd_decode_frame(), escape124_decode_frame(), execute_code(), ff_mjpeg_decode_sof(), ff_thread_get_buffer(), ff_vp56_decode_frame(), frame_start(), gif_decode_frame(), idcin_decode_frame(), indeo3_decode_frame(), ipvideo_decode_frame(), lag_decode_frame(), libopenjpeg_decode_frame(), pcx_decode_frame(), pnm_decode_frame(), ptx_decode_frame(), rl2_decode_frame(), roq_encode_frame(), submit_packet(), sunrast_decode_frame(), svq1_encode_frame(), tgq_decode_frame(), tiff_decode_tag(), tmv_decode_frame(), tqi_decode_frame(), txd_decode_frame(), ulti_decode_frame(), update_context_from_user(), vmdvideo_decode_frame(), vp8_decode_frame(), vqa_decode_frame(), xan_decode_frame(), and yop_decode_frame().

void(* AVCodecContext::release_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called to release buffers which were allocated with get_buffer.

A released buffer can be reused in get_buffer(). pic.data[*] must be set to NULL. May be called from a different thread if frame multithreading is used, but not by more than one thread at once, so does not need to be reentrant.

• encoding: unused
• decoding: Set by libavcodec, user can override.

Referenced by aasc_decode_end(), aura_decode_end(), aura_decode_frame(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), bethsoftvid_decode_end(), bfi_decode_close(), bfi_decode_frame(), bmp_decode_end(), bmp_decode_frame(), cavs_decode_frame(), cdg_decode_end(), cdg_decode_frame(), cinepak_decode_end(), cinvideo_decode_end(), cmv_decode_end(), cmv_decode_frame(), common_end(), copy_frame(), cyuv_decode_end(), cyuv_decode_frame(), decode_close(), decode_end(), decode_frame(), decode_pic(), dnxhd_decode_close(), dnxhd_decode_frame(), dvvideo_close(), escape124_decode_close(), escape124_decode_frame(), execute_code(), ff_mjpeg_decode_end(), ff_mjpeg_decode_sof(), ff_pnm_end(), ff_thread_release_buffer(), ff_vp56_decode_frame(), ff_vp56_free(), flashsv_decode_end(), flashsv_decode_frame(), flic_decode_end(), flush(), gif_decode_close(), gif_decode_frame(), idcin_decode_end(), idcin_decode_frame(), indeo3_decode_frame(), ipvideo_decode_end(), ipvideo_decode_frame(), ir2_decode_end(), ir2_decode_frame(), lag_decode_end(), lag_decode_frame(), libopenjpeg_decode_close(), libopenjpeg_decode_frame(), mm_decode_end(), mp_decode_end(), msrle_decode_end(), msvideo1_decode_end(), pcx_decode_frame(), pcx_end(), png_dec_end(), pnm_decode_frame(), ptx_decode_frame(), ptx_end(), qtrle_decode_end(), release_buffer(), rl2_decode_end(), rl2_decode_frame(), roq_decode_end(), roq_encode_end(), rpza_decode_end(), select_input_picture(), seqvideo_decode_end(), sgi_end(), smc_decode_end(), sunrast_decode_frame(), sunrast_end(), targa_end(), tgq_decode_end(), tgq_decode_frame(), tiff_decode_tag(), tiff_end(), tmv_decode_close(), tmv_decode_frame(), tqi_decode_end(), tqi_decode_frame(), truemotion1_decode_end(), truemotion1_decode_header(), txd_decode_frame(), txd_end(), ulti_decode_end(), ulti_decode_frame(), uninit(), update_context_from_user(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vp8_decode_flush(), vp8_decode_frame(), vqa_decode_end(), vqa_decode_frame(), xan_decode_end(), xan_decode_frame(), yop_decode_close(), and yop_decode_frame().

int AVCodecContext::has_b_frames

Size of the frame reordering buffer in the decoder.

For MPEG-2 it is 1 IPB or 0 low delay IP.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Definition at line 1388 of file avcodec.h.

Referenced by compute_pkt_fields(), compute_pkt_fields2(), decode(), decode_nal_units(), decode_postinit(), decode_stream_header(), dirac_combine_frame(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_mpeg4_decode_picture_header(), ff_rv34_decode_init(), flush(), has_decode_delay_been_guessed(), libdirac_decode_frame(), libdirac_encode_init(), libschroedinger_decode_frame(), libschroedinger_encode_init(), mov_build_index(), mpeg_decode_postinit(), mpegvideo_extract_headers(), MPV_encode_init(), mxf_get_mpeg2_codec_ul(), nut_read_header(), receive_frame(), rv10_decode_init(), rv20_decode_picture_header(), show_stream(), svq1_decode_init(), svq3_decode_init(), transcode(), update_context_from_thread(), update_initial_durations(), vc1_decode_init(), vcr2_init_sequence(), write_streamheader(), X264_init(), and XAVS_init().

int AVCodecContext::block_align

number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.

Definition at line 1394 of file avcodec.h.

Referenced by adpcm_decode_frame(), aea_read_header(), aea_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_trailer(), apc_read_header(), asf_write_header1(), atrac1_decode_frame(), atrac3_decode_frame(), atrac3_decode_init(), av_write_header(), avi_read_header(), avi_write_packet(), avisynth_read_header(), cin_read_header(), cook_decode_frame(), cook_decode_init(), daud_header(), decode_init(), decode_packet(), decode_wave_header(), dxa_read_header(), ea_read_header(), encode_init(), ff_mov_read_stsd_entries(), ff_parse_specific_params(), ff_raw_read_header(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_wma_init(), film_read_header(), flic_read_header(), fourxm_read_header(), get_aiff_header(), get_sindex(), gsm_decode_frame(), gsm_init(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), iss_read_header(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), matroska_parse_block(), matroska_read_header(), mov_write_header(), mxf_write_d10_audio_packet(), mxf_write_wav_common(), mxg_read_header(), oma_read_header(), oma_read_packet(), pcm_encode_init(), pcm_read_seek(), ra288_decode_frame(), raw_read_packet(), read_desc_chunk(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), seq_read_header(), sox_read_header(), sox_read_packet(), str_read_packet(), transcode(), tta_decode_init(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdaudio_loadsound(), wc3_read_header(), wmavoice_decode_init(), wmavoice_decode_packet(), wsaud_read_header(), wsvqa_read_header(), and xa_read_header().

int AVCodecContext::parse_only

Definition at line 1396 of file avcodec.h.

Referenced by decode_init(), and open_parser().

int AVCodecContext::mpeg_quant

0-> h263 quant 1-> mpeg quant

• encoding: Set by user.

• decoding: unused

Definition at line 1405 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

char* AVCodecContext::stats_out

pass1 encoding statistics output buffer

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1412 of file avcodec.h.

Referenced by common_end(), do_video_out(), encode_close(), ff_write_pass1_stats(), get_stats(), MPV_common_end(), MPV_common_init(), output_packet(), vp8_encode(), and vp8_free().

char* AVCodecContext::stats_in

pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

• encoding: Allocated/set/freed by user.
• decoding: unused

Definition at line 1420 of file avcodec.h.

Referenced by ff_rate_control_init(), submit_stats(), transcode(), and vp8_init().

float AVCodecContext::rc_qsquish

ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.

• encoding: Set by user.
• decoding: unused

Definition at line 1428 of file avcodec.h.

Referenced by modify_qscale().

float AVCodecContext::rc_qmod_amp

Definition at line 1430 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_qmod_freq

Definition at line 1431 of file avcodec.h.

Referenced by modify_qscale().

RcOverride* AVCodecContext::rc_override

ratecontrol override, see RcOverride

• encoding: Allocated/set/freed by user.

• decoding: unused

Definition at line 1438 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

int AVCodecContext::rc_override_count

Definition at line 1439 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

const char* AVCodecContext::rc_eq

rate control equation

• encoding: Set by user
• decoding: unused

Definition at line 1446 of file avcodec.h.

Referenced by add_codec(), avcodec_copy_context(), ff_rate_control_init(), ffm_close(), ffm_read_header(), ffm_write_header(), and get_qscale().

int AVCodecContext::rc_max_rate

maximum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1453 of file avcodec.h.

Referenced by add_codec(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), mpeg1_encode_sequence_header(), mpeg_mux_init(), MPV_encode_init(), MPV_encode_picture(), oggvorbis_init_encoder(), parse_ffconfig(), transcode(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::rc_min_rate

minimum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1460 of file avcodec.h.

Referenced by ff_vbv_update(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), MPV_encode_init(), MPV_encode_picture(), oggvorbis_init_encoder(), parse_ffconfig(), and vp8_init().

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

• encoding: Set by user.

• decoding: unused

Definition at line 1467 of file avcodec.h.

Referenced by add_codec(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), init_pass2(), load_input_picture(), modify_qscale(), mov_write_esds_tag(), mpeg1_decode_sequence(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_extension(), mpeg_mux_init(), MPV_encode_init(), MPV_encode_picture(), new_video_stream(), parse_ffconfig(), select_input_picture(), transcode(), vp8_init(), X264_init(), and XAVS_init().

float AVCodecContext::rc_buffer_aggressivity

Definition at line 1468 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), and modify_qscale().

float AVCodecContext::i_quant_factor

qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1477 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), and XAVS_init().

float AVCodecContext::i_quant_offset

qscale offset between P and I-frames

• encoding: Set by user.

• decoding: unused

Definition at line 1484 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

float AVCodecContext::rc_initial_cplx

initial complexity for pass1 ratecontrol

• encoding: Set by user.

• decoding: unused

Definition at line 1491 of file avcodec.h.

Referenced by ff_rate_control_init().

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below

• encoding: Set by user.

• decoding: unused

Definition at line 1498 of file avcodec.h.

Referenced by dsputil_init(), dsputil_init_bfin(), dsputil_init_ppc(), dsputilenc_init_mmx(), ffm_read_header(), ffm_write_header(), MPV_common_init_altivec(), MPV_common_init_mlib(), MPV_common_init_mmx(), and parse_ffconfig().

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1512 of file avcodec.h.

Referenced by adaptive_quantization(), MPV_encode_init(), and parse_ffconfig().

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1519 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1526 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::p_masking

p block masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1533 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1540 of file avcodec.h.

Referenced by adaptive_quantization(), MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::idct_algo

IDCT algorithm, see FF_IDCT_* below.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1547 of file avcodec.h.

Referenced by calc_intra_matrix(), decode_init(), decode_pic(), dsputil_init(), dsputil_init_alpha(), dsputil_init_arm(), dsputil_init_bfin(), dsputil_init_mmi(), dsputil_init_mmx(), dsputil_init_ppc(), dsputil_init_sh4(), dsputil_init_vis(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_neon(), ff_h263_decode_frame(), ff_vp56_init(), MPV_common_init_altivec(), MPV_common_init_mlib(), parse_ffconfig(), render_slice(), stream_component_open(), tgq_calculate_qtable(), tgq_decode_init(), tqi_calculate_qtable(), tqi_decode_init(), update_context_from_thread(), vc1_decode_init(), vcr2_init_sequence(), vp3_decode_init(), and wmv2_decode_init().

int AVCodecContext::slice_count

slice count

• encoding: Set by libavcodec.

• decoding: Set by user (or 0).

Definition at line 1579 of file avcodec.h.

Referenced by ff_rv34_decode_frame(), get_slice_offset(), rv10_decode_frame(), and update_context_from_thread().

int* AVCodecContext::slice_offset

slice offsets in the frame in bytes

• encoding: Set/allocated by libavcodec.

• decoding: Set/allocated by user (or NULL).

Definition at line 1585 of file avcodec.h.

Referenced by avcodec_copy_context(), and get_slice_offset().

int AVCodecContext::error_concealment

error concealment flags

• encoding: unused
• decoding: Set by user.

Definition at line 1592 of file avcodec.h.

Referenced by ff_er_frame_end(), guess_mv(), and stream_component_open().

unsigned AVCodecContext::dsp_mask

dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.

MMX, SSE. ...)

With the FORCE flag you may instead enable given CPU features. (Dangerous: Usable in case of misdetection, improper usage however will result into program crash.)

Definition at line 1604 of file avcodec.h.

Referenced by dsputil_init_mmx(), ff_dsputil_init_iwmmxt(), main(), and update_context_from_user().

int AVCodecContext::bits_per_coded_sample

bits per sample/pixel from the demuxer (needed for huffyuv).

• encoding: Set by libavcodec.
• decoding: Set by user.

Definition at line 1630 of file avcodec.h.

Referenced by adpcm_decode_init(), aiff_write_header(), alac_encode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), av_find_stream_info(), avi_read_header(), avisynth_read_header(), avs_read_packet(), bfi_read_header(), bmp_encode_frame(), bmp_encode_init(), cin_read_header(), cinepak_decode_init(), create_audio_stream(), daud_header(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_wave_header(), deplanarize(), ea_read_header(), encode_init(), ff_cmap_read_palette(), ff_mov_read_stsd_entries(), ff_raw_read_header(), film_read_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), fourxm_read_header(), g722_init(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_packet_header(), get_sindex(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipvideo_decode_init(), iss_read_header(), mmf_read_header(), mov_get_rawvideo_codec_tag(), mov_write_video_tag(), mpc8_read_header(), mpc_read_header(), mpegps_read_packet(), msrle_decode_frame(), msrle_decode_init(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxg_read_header(), nsv_parse_NSVs_header(), nuv_header(), parse_media_type(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_encode_init(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), rl2_read_header(), roq_read_packet(), rpl_read_header(), seq_read_header(), smacker_read_header(), smka_decode_init(), sox_read_header(), tmv_read_header(), tta_decode_init(), tta_read_header(), update_context_from_thread(), vfw_read_header(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), vmdaudio_loadsound(), voc_get_packet(), voc_write_packet(), vqf_read_header(), wavpack_decode_init(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), and xa_read_header().

int AVCodecContext::prediction_method

prediction method (needed for huffyuv)

• encoding: Set by user.

• decoding: unused

Definition at line 1637 of file avcodec.h.

Referenced by encode_picture_lossless(), encode_picture_ls(), ff_mjpeg_encode_picture_header(), and png_enc_init().

AVRational AVCodecContext::sample_aspect_ratio

sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.

Numerator and denominator must be relatively prime and smaller than 256 for some video standards.

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 1649 of file avcodec.h.

Referenced by add_av_stream1(), av_write_header(), avcodec_get_context_defaults2(), avcodec_string(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), dump_stream_format(), dv_write_pack(), encode_init(), h263_decode_picture_header(), h263_encode_picture_header(), jpeg_put_comments(), mjpeg_decode_app(), mov_write_pasp_tag(), mov_write_tapt_tag(), mov_write_video_tag(), movie_get_frame(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), MPV_encode_init(), new_video_stream(), opt_input_file(), output_packet(), parse_source_parameters(), show_stream(), truemotion1_decode_header(), update_context_from_thread(), X264_init(), and XAVS_init().

AVFrame* AVCodecContext::coded_frame

the picture in the bitstream

• encoding: Set by libavcodec.

• decoding: Set by libavcodec.

Definition at line 1656 of file avcodec.h.

Referenced by a64multi_init_encoder(), ac3_encode_close(), ac3_encode_init(), adx_encode_close(), adx_encode_init(), alac_encode_close(), alac_encode_init(), avcodec_close(), bmp_decode_init(), bmp_encode_init(), common_init(), decode_close(), decode_frame(), decode_init(), decode_init_thread_copy(), dnxhd_decode_init(), dnxhd_encode_init(), do_audio_out(), do_video_out(), do_video_stats(), dvvideo_init(), encode_close(), encode_frame(), encode_init(), encode_init_ls(), Faac_encode_close(), Faac_encode_init(), ff_pnm_init(), filter(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv_encode_frame(), g726_close(), g726_init(), gif_decode_init(), gif_encode_init(), libdirac_encode_frame(), libdirac_encode_init(), libgsm_close(), libgsm_init(), libopenjpeg_decode_init(), libschroedinger_encode_frame(), libschroedinger_encode_init(), mdec_common_init(), MP3lame_encode_close(), MP3lame_encode_init(), MPA_encode_close(), MPA_encode_init(), MPV_common_init(), MPV_frame_end(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), output_packet(), pcm_encode_close(), pcm_encode_init(), pcx_encode_init(), pcx_init(), png_enc_init(), print_report(), ptx_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), roq_dpcm_encode_close(), roq_dpcm_encode_init(), roq_encode_video(), sgi_init(), sunrast_init(), svq1_encode_init(), targa_encode_init(), targa_init(), tiff_init(), txd_init(), ulti_decode_init(), update_context_from_thread(), v4l2_read_packet(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp8_encode(), vp8_free(), vp8_init(), write_audio_frame(), write_video_frame(), X264_init(), XAVS_init(), and yuv4_read_packet().

int AVCodecContext::debug

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1663 of file avcodec.h.

Referenced by avcodec_default_get_buffer(), avcodec_default_release_buffer(), decode_chunks(), decode_ext_header(), decode_frame(), decode_init(), decode_nal_units(), decode_picture_timing(), decode_slice_header(), decode_unregistered_user_data(), decode_vol_header(), decode_vop_header(), ff_alloc_picture(), ff_er_frame_end(), ff_flv_decode_picture_header(), ff_h263_decode_frame(), ff_h263_show_pict_info(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_seq_parameter_set(), ff_h264_execute_ref_pic_marking(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_print_debug_info(), ff_rate_estimate_qscale(), ff_thread_release_buffer(), ff_vbv_update(), ff_wmv2_decode_secondary_picture_header(), ffm_read_header(), ffm_write_header(), find_short(), libdirac_decode_init(), libdirac_encode_init(), libschroedinger_decode_init(), libschroedinger_encode_init(), mjpeg_decode_app(), mjpeg_decode_com(), mjpegb_decode_frame(), modify_qscale(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_gop(), mpeg_decode_picture_display_extension(), mpeg_decode_sequence_display_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), MPV_common_init(), MPV_decode_mb_internal(), msmpeg4_decode_picture_header(), opt_input_file(), parse_ffconfig(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), stream_component_open(), svq3_decode_frame(), truemotion1_decode_header(), and update_context_from_user().

int AVCodecContext::debug_mv

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1687 of file avcodec.h.

Referenced by ff_alloc_picture(), ff_print_debug_info(), MPV_common_init(), stream_component_open(), and update_context_from_user().

uint64_t AVCodecContext::error[4]

error

• encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.

• decoding: unused

Definition at line 1697 of file avcodec.h.

Referenced by estimate_best_b_count(), MPV_encode_picture(), and print_report().

int AVCodecContext::mb_qmin

minimum MB quantizer

• encoding: unused
• decoding: unused

Definition at line 1704 of file avcodec.h.

int AVCodecContext::mb_qmax

maximum MB quantizer

• encoding: unused
• decoding: unused

Definition at line 1711 of file avcodec.h.

int AVCodecContext::me_cmp

motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1718 of file avcodec.h.

Referenced by config(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), ffm_read_header(), ffm_write_header(), filter(), hpel_motion_search(), qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1724 of file avcodec.h.

Referenced by config(), direct_search(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), filter(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

• encoding: Set by user.

• decoding: unused

Definition at line 1730 of file avcodec.h.

Referenced by check_bidir_mv(), config(), direct_search(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1736 of file avcodec.h.

Referenced by dvvideo_init(), encode_mb_internal(), and MPV_encode_init().

int AVCodecContext::dia_size

ME diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 1759 of file avcodec.h.

Referenced by config(), estimate_motion_thread(), ff_init_me(), and svq1_encode_plane().

int AVCodecContext::last_predictor_count

amount of previous MV predictors (2a+1 x 2a+1 square)

• encoding: Set by user.

• decoding: unused

Definition at line 1766 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::pre_me

prepass for motion estimation

• encoding: Set by user.

• decoding: unused

Definition at line 1773 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1780 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 1787 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::me_subpel_quality

subpel ME quality

• encoding: Set by user.

• decoding: unused

Definition at line 1794 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), qpel_motion_search(), X264_init(), and XAVS_init().

enum PixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum PixelFormat *fmt)

callback to negotiate the pixelFormat

Parameters:

fmt

is the list of formats which are supported by the codec, it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. The first is always the native one.

Returns:

the chosen format

• encoding: unused
• decoding: Set by user, if not set the native format will be chosen.

Referenced by avcodec_get_context_defaults2(), decode_init(), decode_slice_header(), ff_h263_decode_init(), mpeg_get_pixelformat(), and vc1_decode_init().

int AVCodecContext::dtg_active_format

DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.

• encoding: unused
• decoding: Set by decoder.

Definition at line 1815 of file avcodec.h.

Referenced by mpeg_decode_user_data(), and update_context_from_thread().

int AVCodecContext::me_range

maximum motion estimation search range in subpel units If 0 then no limit.

• encoding: Set by user.
• decoding: unused

Definition at line 1831 of file avcodec.h.

Referenced by encode_init(), ff_fix_long_mvs(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm_read_header(), ffm_write_header(), get_limits(), mpeg1_encode_sequence_header(), X264_init(), and XAVS_init().