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a9fecb8ea1
v4l2_receive_frame() uses two packets s->buf_pkt and avpkt. If avpkt cannot be enqueued, the packet is buffered in s->buf_pkt and enqueued in the next call. Currently the ownership transfer between the two packets is not properly handled. A double free occurs if ff_v4l2_context_enqueue_packet() returns EAGAIN and v4l2_try_start returns EINVAL. In fact, having two AVPackets is not needed and everything can be handled by s->buf_pkt. This commit removes the local avpkt from v4l2_receive_frame(), meaning that the ownership transfer doesn't need to be handled and the double free is fixed. Signed-off-by: Andriy Gelman <andriy.gelman@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.