mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-01-19 05:49:09 +02:00
b0997b8526
The RealVideo 3.0 and 4.0 decoders call ff_mpv_common_init() only during their init function and not during decode_frame(); when the size of the frame changes, they call ff_mpv_common_frame_size_change(). Yet upon error, said function calls ff_mpv_common_end() which frees the whole MpegEncContext and not only those parts that ff_mpv_common_frame_size_change() reinits. As a result, the context will never be usable again; worse, because decode_frame() contains no check for whether the context is initialized or not, it is presumed that it is initialized, leading to segfaults. Basically the same happens if rv34_decoder_realloc() fails. This commit fixes this by only resetting the parts that ff_mpv_common_frame_size_change() changes upon error and by actually checking whether the context is in need of reinitialization in ff_rv34_decode_frame(). Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> (cherry picked from commit 9abda1365c5e2d827eb673b6d98245163c868bf1)
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.