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Nicolas George 69f5f6ea37 lavfi: check the validity of formats lists. 
Part of the code expects valid lists, in particular no duplicates.
These tests allow to catch bugs in filters (unlikely but possible)
and to give a clear message when the error comes from the user
((a)formats) or the application (buffersink).

If we decide to switch to a more efficient merging algorithm,
possibly sorting the lists, these functions will be the preferred
place for pre-processing, and can be renamed accordingly.
2020-09-08 14:10:31 +02:00
compat compat/cuda/ptx2c: remove shell loop; fix BSD sed compat 2020-06-01 22:10:41 -05:00
doc avfilter/asrc_anullsrc: add support to set output duration 2020-09-04 19:37:29 +02:00
ffbuild ffbuild: Refine MIPS handling 2020-07-23 16:30:02 +02:00
fftools fftools/ffmpeg: Fix leak of AVFilterInOut in case of error 2020-08-23 19:57:42 +02:00
libavcodec avcodec/ffwavesynth: Fix integer overflow in wavesynth_synth_sample / WS_SINE 2020-09-07 23:05:25 +02:00
libavdevice avdevice/lavfi: Remove redundant av_packet_unref() 2020-09-06 21:45:41 +02:00
libavfilter lavfi: check the validity of formats lists. 2020-09-08 14:10:31 +02:00
libavformat avformat/electronicarts: change non failure return of read_header() to 0 2020-09-08 00:06:53 +02:00
libavresample
libavutil hwcontext_vaapi: Don't require a render node when deriving from DRM 2020-08-31 21:42:14 +01:00
libpostproc Bump minor versions after branching 4.3 2020-06-08 22:49:04 +02:00
libswresample swresample/rematrix: handle 22.2 as a 9 channel layout 2020-08-18 22:47:35 +03:00
libswscale swscale/x86/output: add missing AVX2 support preprocessor wrappers 2020-08-20 15:14:56 -03:00
presets
tests fate: add wav chapters test 2020-09-07 19:04:09 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for WMV3IMAGE 2020-09-07 23:05:25 +02:00
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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.