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Andreas Rheinhardt b347384173 avcodec/me_cmp: Remove ff_check_alignment() 
The usage of a static variable presents a potential for data races and
means that this function can't be used in init functions of codecs with
FF_CODEC_CAP_INIT_THREADSAFE (unless of course one presumes that
everything is alright in which case the error is not triggered; but then
the whole function is pointless...). This makes the Snow decoder
init-threadsafe as it already claims.

Notice that this function has been removed in 2014 by Libav in commit
9103185bd1, because only some codepaths
are checked this way and because it only affects legacy compilers. The
latter is of course even more true today.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2021-01-21 19:13:06 +01:00
compat All: update names in copyright headers 2021-01-20 01:02:56 -06:00
doc avfilter/vf_nnedi: rewrite and cleanup code 2021-01-18 14:05:51 +01:00
ffbuild ffbuild: Refine MIPS handling 2020-07-23 16:30:02 +02:00
fftools ffmpeg_opts: remove lowres check 2021-01-21 10:22:41 -03:00
libavcodec avcodec/me_cmp: Remove ff_check_alignment() 2021-01-21 19:13:06 +01:00
libavdevice kmsgrab: Do not require the modifier to stay constant. 2021-01-13 23:08:02 +00:00
libavfilter avfilter/vf_readeia608: add >8 depth support 2021-01-21 14:52:40 +01:00
libavformat avformat/asfdec_o: Check size vs. offset in detect_unknown_subobject() 2021-01-20 21:26:46 +01:00
libavresample
libavutil All: update names in copyright headers 2021-01-20 01:02:56 -06:00
libpostproc lavu/mem: move the DECLARE_ALIGNED macro family to mem_internal on next+1 bump 2021-01-01 14:14:57 +01:00
libswresample swresample/audioconvert: Fix left shift of negative value 2020-09-30 10:50:45 +02:00
libswscale lavu/mem: move the DECLARE_ALIGNED macro family to mem_internal on next+1 bump 2021-01-01 14:14:57 +01:00
presets
tests movenc: Present durations in mvhd/tkhd/mdhd as they are after edits 2021-01-15 15:01:03 +02:00
tools tools/target_dem_fuzzer.c: Decrease maxblocks 2021-01-05 02:00:05 +01:00
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.mailmap mailmap: add entry for myself 2020-07-13 11:24:04 +08:00
.travis.yml
Changelog avfilter: add estdif video filter 2021-01-16 14:08:59 +01:00
configure avcodec/librav1e: Pass through timestamps as opaque user data 2021-01-17 14:49:46 +00:00
CONTRIBUTING.md
COPYING.GPLv2
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INSTALL.md
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MAINTAINERS MAINTAINERS: update names 2021-01-20 01:04:26 -06:00
Makefile tools/enum_options: fix build and add to Makefile 2020-11-20 15:20:24 +01:00
README.md
RELEASE RELEASE: We are after the 4.3 branch point, update for that 2020-06-10 00:20:24 +02:00

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 a mean to alter decoded Audio and Video through chain of 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.