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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
compat atomics: Fix the win32 atomic_exchange function 2021-04-04 11:06:08 +03:00
doc avformat/utils: add helper functions to retrieve index entries from an AVStream 2021-04-07 09:51:44 -03:00
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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
libavdevice Bump minor versions after release branch 2021-03-20 01:02:11 +01:00
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
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil avutil/frame: Return 0 on success in av_frame_ref() 2021-04-05 18:36:51 +02:00
libpostproc Bump minor versions after release branch 2021-03-20 01:02:11 +01:00
libswresample libswresample/audioconvert: Fix undefined NULL + 0 2021-04-01 14:15:20 +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.