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02bbb37006
When reading a new frame, the Smacker demuxer seeks to the next frame position where it excepts the next frame; then it (potentially) reads the palette, the audio packets associated with the frame and finally the actual video frame. It is only at the end that the frame counter as well as the position where the next frame is expected get updated. This has a downside: If e.g. invalid data is encountered when reading the palette, the demuxer returns immediately (with an error) and if the caller calls av_read_frame again, the demuxer seeks to the position where it already was, reads the very same palette data again and therefore will return an error again. If the caller calls av_read_frame repeatedly (say, until a packet is received or until EOF), this meight become an infinite loop. This could also happen if e.g. the size of one of the audio frames was invalid or if the frame size was gigantic. This commit changes this by skipping a frame if it turns out to be invalid or an error happens otherwise. This ensures that EOF will be returned eventually in the above scenario. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.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.