0a6751a78a
When no frames were passed from a filtergraph to an encoder, but the filtergraph is configured (i.e. has output parameters), encoder flush code will use those parameters to initialize the encoder in a last-ditch effort to produce some useful output. Rework this process so that it is triggered by the filtergraph, which now sends a dummy frame with parameters, but no data, to the encoder, rather than the encoder reaching backwards into the filter. This approach is more in line with the natural data flow from filters to encoders and will allow to reduce encoder-filter interactions in following commits. This code is tested by fate-adpcm-ima-cunning-trunc-t2-track1, which (as confirmed by Zane) is supposed to produce empty output.
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.