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Anton Khirnov b593abda6c lavc/pngdec: always create a copy for APNG_DISPOSE_OP_BACKGROUND Calling av_frame_make_writable() from decoders is tricky, especially when frame threading is used. It is much simpler and safer to just make a private copy of the frame. This is not expected to have a major performance impact, since APNG_DISPOSE_OP_BACKGROUND is not used often and av_frame_make_writable() would typically make a copy anyway. Found-by: James Almer <jamrial@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>		2021-04-08 22:40:26 +02:00
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fftools	fftools/ffmpeg: copy average framerate for streamcopy, when known	2021-04-08 11:03:15 +02:00
libavcodec	lavc/pngdec: always create a copy for APNG_DISPOSE_OP_BACKGROUND	2021-04-08 22:40:26 +02:00
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libavfilter	lavfi/dnn: add post process for detection	2021-04-08 09:23:02 +08:00
libavformat	avformat/webvttenc: Fix use of uninitialized variable	2021-04-08 14:14:45 +02:00
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tests	tests/fate: add tests for PNG side/meta data	2021-04-08 11:03:15 +02:00
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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.