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This field contains different values depending on whether the stream is being decoded or not. When it is, InputStream.pts is set to the timestamp of the last decoded frame. Otherwise, it is made equal to InputStream.dts. Since a given InputStream can be at the same time decoded and streamcopied to any number of output streams, this use is incorrect, as decoded frame timestamps can be delayed with respect to input packets by an arbitrary amount (e.g. depending on the thread count when frame threading is used). Replace all uses of InputStream.pts for streamcopy with InputStream.dts, which is its value when decoding is not performed. Stop setting InputStream.pts for pure streamcopy. Also, pass InputStream.dts as a parameter to do_streamcopy(), which will allow that function to be decoupled from InputStream completely in the future.
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 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.