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Vignesh Venkatasubramanian 7bcc1b4eb8 libsvtav1: Add workaround for gop_size == 1 
In some versions of libsvtav1, setting intra_period_length to 0
does not produce the intended result (i.e.) all frames produced
are not keyframes.

Instead handle the gop_size == 1 as a special case by setting
the pic_type to EB_AV1_KEY_PICTURE when encoding each frame so
that all the output frames are keyframes.

SVT-AV1 Bug: https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/2076

Example command: ffmpeg -f lavfi -i testsrc=duration=1:size=64x64:rate=30 -c:v libsvtav1 -g 1 -y test.webm

Before: Only first frame is keyframe, rest are intraonly.
After: All frames are keyframes.

Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
2023-07-13 17:25:02 -04:00
compat
doc avfilter/avf_showcwt: add rotation option 2023-07-13 00:11:36 +02:00
ffbuild
fftools fftools/ffmpeg_mux: forward EOF from the sync queue 2023-07-13 13:08:56 +02:00
libavcodec libsvtav1: Add workaround for gop_size == 1 2023-07-13 17:25:02 -04:00
libavdevice lavd/opengl: select the GL context before drawing 2023-07-12 15:06:15 +02:00
libavfilter avfilter/avf_showcwt: add rotation option 2023-07-13 00:11:36 +02:00
libavformat avformat/ivfenc: Set the "number of frames" in IVF header 2023-07-09 16:56:58 -04:00
libavutil lavu/avassert: include config.h 2023-07-12 15:35:37 +02:00
libpostproc
libswresample Move bessel_i0() from swresample/resample to avutil/mathematics 2023-05-29 00:45:28 +02:00
libswscale libswscale/riscv: fix syntax of vsetvli 2023-07-13 22:01:24 +03:00
presets
tests tests/fate-run: add testing with a random number of threads 2023-07-11 19:19:32 +02:00
tools tools/target_bsf_fuzzer: fix some filter names 2023-06-29 22:44:11 -03:00
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Changelog avformat/rawenc: add H266/VVC muxer 2023-06-29 14:12:50 -03:00
configure avutil: fix build failure on osx 10.4 2023-07-08 14:51:15 -03:00
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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.