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Ruijing Dong 89e3814569 avcodec/av1_vaapi: fixed a decoding corruption issue 
In av1_spec.pdf page 38/669, there is a sentence below:

if ( frame_type == KEY_FRAME && show_frame ) {
   for ( i = 0; i < NUM_REF_FRAMES; i++) {
      RefValid[ i ] = 0
      ......
   }
   ......
}

This shows that the condition of invalidating current
DPB frames should be the coming frame_type is KEY_FRAME plus
show_frame is equal to 1. Otherwise, some of the frames
in sequence after KEY_FRAME still refer to the reference frames
before KEY_FRAME, and if these before KEY_FRAME reference
frames were invalidated, these frames could not find their
reference frames, and it could cause image corruption.

Mesa fix is in https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19386

Reviewed-by: Fei Wang <fei.w.wang@intel.com>
Signed-off-by: Ruijing Dong <ruijing.dong@amd.com>
2022-11-04 09:51:37 +08:00
compat
doc avutil/channel_layout: add a 7.1(top) channel layout 2022-11-03 19:39:45 -03:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools ffmpeg: fix implementation of updated input start time 2022-11-03 14:38:42 +05:30
libavcodec avcodec/av1_vaapi: fixed a decoding corruption issue 2022-11-04 09:51:37 +08:00
libavdevice avdevice/avdevice: Fix mismatching argument name 2022-10-17 09:51:47 +02:00
libavfilter avfilter/src_movie: support unknown channel layouts 2022-11-02 10:53:44 +01:00
libavformat avformat/serdec: fix BE/LE format handling 2022-11-03 16:59:18 +01:00
libavutil avutil/channel_layout: add a 7.1(top) channel layout 2022-11-03 19:39:45 -03:00
libpostproc
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale sw_scale: Add specializations for hscale 16 to 19 2022-11-01 15:24:58 +02:00
presets
tests avutil/channel_layout: add a 7.1(top) channel layout 2022-11-03 19:39:45 -03:00
tools tools/target_dec_fuzzer: Adjust threshold for FFV1 2022-10-20 21:42:21 +02:00
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Changelog avcodec: ViewQuest VQC decoder 2022-10-18 13:20:37 +11:00
configure configure: add pkg-config check for chromaprint 2022-11-03 12:37:41 +01:00
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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 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.