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Anton Khirnov 87b4453ec6 fftools/ffmpeg: stop printing PSNR information in status report 
When an encoder exports sum-of-squared-differences information in
encoded packets, print_report() will print PSNR information in the
status line. However,
* the code computing PSNR assumes 8bit 420 video and prints incorrect
  values otherwise; there are no issues on trac about this
* only a few encoders (namely aom, vpx, mpegvideo, snow) export this
  information; other often-used encoders such as libx26[45] do not
  export this, even though they could

This suggests that this feature is not useful and it is better to remove
it rather than spend effort on fixing it.
2023-04-24 16:53:59 +02:00
compat
doc fftools/ffmpeg_opt: Document VAAPI -device usage for DirectX Adapter 2023-04-24 13:24:41 +08:00
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fftools fftools/ffmpeg: stop printing PSNR information in status report 2023-04-24 16:53:59 +02:00
libavcodec lavu/hwcontext_qsv: Update after adding support for VAAPI on Windows 2023-04-24 13:24:41 +08:00
libavdevice avdevice/decklink_enc: Add support for compressed AC-3 output over SDI 2023-04-08 20:08:18 +02:00
libavfilter lavfi/overlay_vaapi: set input region for overlay video to NULL 2023-04-24 13:24:41 +08:00
libavformat avformat/movenc: fixed fmp4 packets containing incorrect flags after transcoding 2023-04-24 09:46:10 +08:00
libavutil lavu/hwcontext_qsv: Update after adding support for VAAPI on Windows 2023-04-24 13:24:41 +08:00
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Changelog lavu/hwcontext_vaapi: Add Windows/VAAPI support with vaGetDisplayWin32 2023-04-24 13:24:41 +08:00
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README.md
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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 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.