a217c1472d
It does not exist for NALUs for which the SODB is empty; it also does not exist for NALUs for which not even the complete header is present. The former category contains end of sequence and end of bitstream units. The latter category consists of one-byte HEVC units (the ordinary H.264 header is only one byte long). This commit therefore stops stripping RBSP trailing padding from the former type of unit and discards the latter type of unit altogether. This also fixes an assertion failure: Before this commit, a one-byte HEVC NALU from an ISOBMFF packet could pass all the checks in hevc_parse_nal_header() (because the first byte of the size field of the next unit is mistaken as containing the temporal_id); yet because the trailing padding bits were stripped, its actually had a size of less than eight bits; because h2645_parse.c uses the checked bitstream reader, the get_bits_count() of the GetBitContext is not 16 in this case; it is not even a multiple of eight and this can trigger an assert in ff_hevc_decode_nal_sei(). Fixes: Assertion failure Fixes: 46662/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-4947860854013952 Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> 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.