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It is not really needed, as none of the buffers allocated in ff_mpv_common_init() are used lateron; in fact, ff_mpv_common_init() is called with MpegEncContext.width and height equal to zero (as well as encoding equal to zero, so that the error resilience parts are initialized...), so that all the buffers are too small anyway. The call to ff_mpv_common_init() has been added in commitf6774f905fin order to allocate {current,last,new}_picture.f (an AVFrame). Yet this is unnecessary since7814dd77aa. The only task that ff_mpv_common_init() does that may be used is initializing the HpelDSPContext embedded in the MpegEncContext. In fact, it was not initialized beforef6774f905fand not initializing it passes FATE, yet I can't prove that it is indeed unnecessary. Therefore it is still initialized and used instead of SVQ1EncContext.hdsp. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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.