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Andreas Rheinhardt 013e49ab52 avformat/matroskaenc: Check for reformatting errors 
This is needed especially for AV1: If a reformatting error happens (e.g.
if the length field of an OBU contained in the current packet indicates
that said OBU extends beyond the current packet), the data pointer is
still NULL, yet the size is unchanged, so that writing the data leads
to a segmentation fault.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 58428bef4b)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-07-03 13:10:43 +02:00
compat
doc Update for FFmpeg 3.3.9 2018-11-01 01:32:12 +01:00
libavcodec avcodec/ra144enc: Fix invalid left shift of negative number 2020-07-03 13:10:43 +02:00
libavdevice avdevice/iec61883: free the private context at the end 2018-04-18 23:02:59 -03:00
libavfilter avfilter/af_silenceremove: fix possible crash if supplied duration is negative 2019-01-25 00:58:14 +01:00
libavformat avformat/matroskaenc: Check for reformatting errors 2020-07-03 13:10:43 +02:00
libavresample
libavutil avutil/mem: Fix invalid use of av_alloc_size 2019-07-23 01:22:27 -03:00
libpostproc
libswresample swresample/swresample: Fix input channel count in resample_first computation 2018-11-01 00:52:46 +01:00
libswscale
presets
tests avcodec/mpeg2dec: Fix field selection for skipped macroblocks 2018-04-13 00:35:15 +02:00
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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.
  • ffserver is a multimedia streaming server for live broadcasts.
  • 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.