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Rafael Henrique Gonçalves de OliveiraandTimo Rothenpieler
9627f97678
Windows Graphics Capture only delivers a frame when the captured content changes, so a static source makes gfxcapture output nothing at all. An fps filter after it cannot help, since it has no later frame to duplicate up to, and anything muxed alongside stalls as well. Add a dup_frames option, like ddagrab has. When no new frame arrived within one 1/max_framerate interval, output a new reference to the last frame, or a black frame before the source delivered its first one. Repeats are stamped with their deadline in the QPC clock, the same clock as SystemRelativeTime, and the next deadline counts from the previous one, so timer overshoot shows up neither in the timestamps nor in the rate. A captured frame timestamped at or before the last output is bumped to keep timestamps increasing. The new option is on by default, since the current behaviour is arguably surprising and clashes with how a lot of the filter chain and the fftools work. Signed-off-by: Rafael Henrique Gonçalves de Oliveira <rafaelh9six@gmail.com> Co-authored-by: Timo Rothenpieler <timo@rothenpieler.org>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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 Forgejo or 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.
See https://ffmpeg.org/developer.html for more information.