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Andreas Rheinhardt 5a157313b3 avcodec/vc1dec: Don't open and close decoder during init 
This is done since 16af29a7a6
(and is actually unnecessary, because the tables initialized
in ff_msmpeg4_decode_init() are only ever used in vc1_block.c
which is only entered after a call to ff_msmpeg4_decode_init())
in a very ugly manner; said manner had the byproduct of
involving lots of unnecessary allocations and even opening
and closing a hwaccel in case one is used.

This commit achieves the aim of 16af29a7a6
by initializing the VLCs used by VC-1 in ff_vc1_init_common().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-11-06 17:41:26 +01:00
compat
doc Revert "lavc: deprecate avcodec_dct, av_fft, av_dct, av_rdft and av_mdct" 2022-11-06 12:15:56 -03:00
ffbuild
fftools ffmpeg: fix implementation of updated input start time 2022-11-03 14:38:42 +05:30
libavcodec avcodec/vc1dec: Don't open and close decoder during init 2022-11-06 17:41:26 +01:00
libavdevice
libavfilter lavfi/vf_fieldmatch: keep fields as-is if not matched properly 2022-11-05 11:50:36 +01:00
libavformat avformat/replaygain: avoid undefined / negative abs 2022-11-04 22:44:16 +01:00
libavutil avutil/dict: Improve documentation 2022-11-06 08:26:50 +01:00
libpostproc
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale swscale/output: Bias 16bps output calculations to improve non overflowing range for GBRP16/GBRPF32 2022-11-04 22:44:16 +01:00
presets
tests imc: convert to lavu/tx, remove NIH iMDCT and replace with a standard one 2022-11-06 14:39:42 +01:00
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Changelog avfilter: add backgroundkey video filter 2022-11-05 10:52:39 +01:00
configure qdm2: convert to lavu/tx 2022-11-06 14:39:42 +01:00
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README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.