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Anton Khirnov 0b33310cd0 lavc/bitstream: avoid UB in bits_{read,peek}_signed(0) 
bits_*_signed(0) will currently invoke an undefined shift by
8 * sizeof(int).

Add bits_*_signed_nz() that only works for n>0, analogous to
bits_read_nz(). Add an explicit check for n=0 in bits_*_signed().

Found-by: James Almer
2023-01-18 09:41:32 +01:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avfilter: add fractional delay IR source filter 2023-01-16 09:59:31 +01:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools ffprobe: expose AVAmbientViewingEnvironment side data in AVFrames 2023-01-13 21:26:27 +02:00
libavcodec lavc/bitstream: avoid UB in bits_{read,peek}_signed(0) 2023-01-18 09:41:32 +01:00
libavdevice avdevice/avfoundation: convert to new channel layout-API 2022-11-08 14:08:05 -03:00
libavfilter avfilter/vf_histogram: call av_frame_copy_props() 2023-01-17 23:20:00 +01:00
libavformat avformat/segment: calculate segment durations correctly. 2023-01-16 15:37:59 +05:30
libavutil avutil: introduce AVAmbientViewingEnvironment side data 2023-01-13 21:26:13 +02:00
libpostproc postproc/postprocess_template: Fix alignment 2022-11-09 17:39:00 +01:00
libswresample swresample/swresample_frame: fix regression in detecting changes 2023-01-04 18:19:07 +01:00
libswscale swscale/utils: Fix indentation 2022-11-24 21:02:57 +01:00
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tests avformat/segment: calculate segment durations correctly. 2023-01-16 15:37:59 +05:30
tools tools/target_dec_fuzzer: Adjust threshold for RSCC 2022-12-01 21:43:57 +01:00
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.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avfilter: add fractional delay IR source filter 2023-01-16 09:59:31 +01:00
configure avcodec/vaapi_encode_h26x: passthrough A53 CC data as H264/HEVC SEI 2023-01-17 10:10:52 +08:00
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LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add myself as amfenc* maintainer 2022-11-10 16:28:07 +01:00
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RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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 means to alter decoded audio and video through a directed graph of connected 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.