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The MJPEG encoder supports some pixel format/color range combinations only when strictness is set to unofficial or less. Before commit059fc2d9dasaid encoder's pix_fmts array only included the pixel formats supported with default strictness. When strictness was <= unofficial, fftools/ffmpeg_filter.c used an extended list of pixel formats instead of the encoder's including the pixel formats only supported when strictness <= unofficial. Said commit turned the logic around: The encoder's pix_fmts array now included all pixel formats and fftools/ffmpeg_filter.c instead used a small list of all pixel formats supported when strictness is > unofficial and the encoder's pixel formats instead. In particular, the codec's pix_fmt is not used when strictness is normal. This works for the mjpeg encoder; yet it did not work for other (hardware-based) mjpeg encoders, because the check for whether one is using the MJPEG encoder is wrong: It just checks the codec id. So if one used strict unofficial with a hardware-accelerated MJPEG encoder before commit059fc2d9da, the unofficial (non-hardware) pixel formats of the MJPEG encoder would be used; since said commit the codec's pixel formats are overridden at ordinary strictness by the ordinary MJPEG pixel formats. This leads to format conversion errors lateron which were reported in #9186. The solution to this is to check AVCodec.name instead of its id. Fixes ticket #9186. Tested-by: Eoff, Ullysses A <ullysses.a.eoff@intel.com> 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 a mean to alter decoded Audio and Video through chain of 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.