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Dale Curtis a7e1af3cb1 avutil/common: Add saturated add/sub operations for int64_t. 
Many places are using their own custom code for handling overflow
around timestamps or other int64_t values. There are enough of these
now that having some common saturated math functions seems sound.

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-05-15 22:03:36 +02:00
compat
doc avfilter/vf_minterpolate: change the default threshold to get better scene change detect result 2020-05-14 23:03:07 +08:00
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libavcodec avcodec/nvenc: use framerate if available 2020-05-15 00:44:31 +02:00
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libavfilter Revert "avfilter/vf_framerate: if metadata lavfi.scd.mafd exists, we'll use it first" 2020-05-15 18:35:51 +02:00
libavformat avformat/mov: Don't allow negative sample sizes. 2020-05-15 22:03:36 +02:00
libavresample
libavutil avutil/common: Add saturated add/sub operations for int64_t. 2020-05-15 22:03:36 +02:00
libpostproc
libswresample
libswscale swscale: fix NEON hscale init 2020-05-15 10:29:30 +01:00
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tests checkasm: aarch64: Check for stack overflows 2020-05-15 21:22:36 +03:00
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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 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.