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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
ffbuild ffbuild/common: Make deletion of templates possible 2021-02-07 09:45:04 +01:00
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
libswscale libswscale/x86/yuv2yuvX: Removes unrolling for mmx and mmxext 2021-04-01 20:47:52 +02:00
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tests tests/fate: add tests for PNG side/meta data 2021-04-08 11:03:15 +02:00
tools tools/target_dem_fuzzer: Fix packet leak 2021-04-01 10:10:21 +02:00
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.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avformat: add Changelog entry for librist and bump minor 2021-03-13 17:36:48 +01:00
configure configure: select child muxers for rtp_mpegts 2021-03-21 15:50:23 +05:30
CONTRIBUTING.md
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INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add myself as adpcm maintainer 2021-03-25 12:51:10 +10:00
Makefile avcodec: move core AVCodecContext functions from util.c to a new file 2021-03-19 15:35:35 -03:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00

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.