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Aman Gupta 41ed2c3849 avcodec/cbs: ensure user_data is padded for GBC parsing 
Fixes crash noticed in the cbs_userdata patchset.

====ERROR: AddressSanitizer: heap-buffer-overflow on address 0x609000026c89 at pc 0x00010725d37b bp 0x7ffeea04e750 sp 0x7ffeea04e748
READ of size 4 at 0x609000026c89 thread T0
    #0 0x10725d37a in ff_cbs_read_unsigned get_bits.h:274
    #1 0x1072d2767 in ff_cbs_read_a53_user_data cbs_misc_syntax_template.c:119
    #2 0x1078251a7 in h264_metadata_filter h264_metadata_bsf.c:595
    #3 0x105c1321d in output_packet ffmpeg.c:853

0x609000026c89 is located 1 bytes to the right of 8-byte region [0x609000026c80,0x609000026c88)
allocated by thread T0 here:
    #0 0x10aef08d7 in wrap_posix_memalign (libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x578d7)
    #1 0x10aca95e6 in av_malloc mem.c:87
    #2 0x10ac545fe in av_buffer_allocz buffer.c:72
    #3 0x107263b27 in cbs_h264_read_nal_unit cbs_h264_syntax_template.c:722
    #4 0x10725b688 in cbs_read_fragment_content cbs.c:155

Signed-off-by: Aman Gupta <aman@tmm1.net>
2018-10-15 11:52:54 -07:00
compat w32pthreads: always use Vista+ API, drop XP support 2018-04-09 21:58:39 +02:00
doc doc/filters: update silenceremove documentation 2018-10-15 19:03:01 +02:00
ffbuild Merge commit '17b6c7efb471e8ff1b8a7271f6531ba1d52bf69c' 2017-11-12 01:02:02 -03:00
fftools ffmpeg: log corrupted packets and frames 2018-10-14 23:52:41 +02:00
libavcodec avcodec/cbs: ensure user_data is padded for GBC parsing 2018-10-15 11:52:54 -07:00
libavdevice avdevice/decklink_dec: add option to align capture start time 2018-09-30 21:09:12 +02:00
libavfilter avfilter/af_silenceremove: use enum for threshold detection modes 2018-10-15 19:03:01 +02:00
libavformat avformat: add SER demuxer 2018-10-13 15:40:08 +02:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil lavu/qsv: make a copy as libmfx alignment requirement for uploading 2018-10-11 13:26:59 +08:00
libpostproc Bump minor versions after release/4.0 branching 2018-04-16 12:35:12 +02:00
libswresample swresample/swresample: Fix input channel count in resample_first computation 2018-07-26 02:42:42 +02:00
libswscale swscale/x86/rgb2rgb : port shuffle 2103 mmxext to external asm and remove inline asm version 2018-10-13 14:12:41 +02:00
presets
tests avfilter/af_silenceremove: add options to keep min duration of silence 2018-10-15 19:03:01 +02:00
tools tools/qt-faststart: Allow free atoms after moov atom. 2018-08-01 00:49:54 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore Remove the ffserver program 2018-01-06 18:31:37 +00:00
.travis.yml Merge commit '4809781586d1c956005f72946a2aab5915eab350' 2017-10-28 15:08:31 -03:00
Changelog avformat: add SER demuxer 2018-10-13 15:40:08 +02:00
configure avcodec: add an AV1 parser 2018-10-03 20:48:49 -03:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md Merge commit '4fef648d10bf3bcfd4b8fa5755c1128966a2427c' 2017-03-15 22:07:47 +01:00
MAINTAINERS MAINTAINERS: add myself to MIPS section 2018-08-08 01:00:10 +02:00
Makefile avcodec/parser: move parsers list and related API to its own file 2018-07-21 16:08:29 -03:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE RELEASE: update for git after 4.0 branchpoint 2018-09-25 17:29:24 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements 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, ismindex and qt-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.