Documentation:Modules/avcodec

See also: Documentation:Modules/avformat

Module: avcodec
Type	codec library
First VLC version	-
Last VLC version	-
Operating system(s)	all
Description	Various audio and video decoders/encoders delivered by the FFmpeg library. This includes (MS)MPEG4, DivX, SVQ1, H261, H263, H264, WMV, WMA, AAC, AMR, DV, MJPEG and other codecs
Shortcut(s)	-

libavcodec provided by the FFmpeg project. A full list of supported codecs may be found with modules/codec/avcodec/fourcc.c

Options prefixed with ffmpeg- or sout-ffmpeg- were deprecated in 2.1.0 to reflect the new module name avcodec. The only option that seems not to have been replaced later is --avcodec-vismv, removed in 3.0.0.

Options as of 3.0.6:

Decoding

• avcodec-dr <boolean> : Direct rendering default value: enabled
• avcodec-corrupted <boolean> : Show corrupted frames default value: enabled
• avcodec-error-resilience <integer> : Error resilience
• avcodec-workaround-bugs <integer> : Workaround bugs
• avcodec-hurry-up <boolean> : Hurry up default value: enabled
• avcodec-skip-frame <integer> {-1 (None), 0 (Default), 1 (Non-ref), 2 (Bidir), 3 (Non-key), 4 (All)} : Skip frame default value: 0
• avcodec-skip-idct <integer> {-1 (None), 0 (Default), 1 (Non-ref), 2 (Bidir), 3 (Non-key), 4 (All)} : Skip IDCT default value: 0
• avcodec-fast <boolean> : Allow speed tricks default value: disabled
• avcodec-skiploopfilter <integer> {0 (None), 1 (Non-ref), 2 (Bidir), 3 (Non-key), 4 (All)} : Skip the loop filter for H.264 decoding)
• avcodec-debug <integer> : Debug mask
• avcodec-codec <string> : Codec name
• avcodec-hw <integer> {any,vdpau_avcodec,vaapi,vaapi_drm,none} : Hardware decoding
• avcodec-threads <integer> : Threads
• avcodec-options <string> : Advanced options

Encoding

• sout-avcodec-codec <string> : Codec name
• sout-avcodec-hq <string> {rd,bits,simple} : Quality level
• sout-avcodec-keyint <integer> : Ratio of key frames
• sout-avcodec-bframes <integer> : Ratio of B frames
• sout-avcodec-hurry-up <boolean> : Hurry up default value: disabled
• sout-avcodec-interlace <boolean> : Interlaced encoding default value: disabled
• sout-avcodec-interlace-me <boolean> : Interlaced motion estimation default value: enabled
• sout-avcodec-vt <integer> : Video bitrate tolerance
• sout-avcodec-pre-me <boolean> : Pre-motion estimation default value: disabled
• sout-avcodec-rc-buffer-size <integer> : Rate control buffer size
• sout-avcodec-rc-buffer-aggressivity <float> : Rate control buffer aggressiveness
• sout-avcodec-i-quant-factor <float> : I quantization factor
• sout-avcodec-noise-reduction <integer> : Noise reduction
• sout-avcodec-mpeg4-matrix <boolean> : MPEG4 quantization matrix default value: disabled
• sout-avcodec-qmin <integer> : Minimum video quantizer scale
• sout-avcodec-qmax <integer> : Maximum video quantizer scale
• sout-avcodec-trellis <boolean> : Trellis quantization default value: disabled
• sout-avcodec-qscale <float> : Fixed quantizer scale
• sout-avcodec-strict <integer [-2 .. 2]> : Strict standard compliance
• sout-avcodec-lumi-masking <float> : Luminance masking
• sout-avcodec-dark-masking <float> : Darkness masking
• sout-avcodec-p-masking <float> : Motion masking
• sout-avcodec-border-masking <float> : Border masking
• sout-avcodec-luma-elim-threshold <integer> : Luminance elimination
• sout-avcodec-chroma-elim-threshold <integer> : Chrominance elimination
• sout-avcodec-aac-profile <string> : Specify AAC audio profile to use
• sout-avcodec-options <string> : Advanced options

Source code

• modules/codec/avcodec (folder)
• modules/codec/avcodec/avcodec.c (main file)

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