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Andreas Rheinhardt 3614f7e1cc avcodec/vp3: Fix undefined pointer arithmetic 
When decoding a keyframe, last_frame and golden_frame are
not used at all and (at least when starting decoding)
are not set at all. But due to code sharing pointer arithmetic
on the NULL data-pointers of these frames has nevertheless
been performed. This is undefined behaviour and causes e.g.
"runtime error: applying non-zero offset 173440 to null pointer"
from UBSan in the vp31, vp4, theora-coeff-level64 and theora-offset
FATE-tests.

Fix this by reusing the current frame for unavailable frames.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-09-18 02:55:14 +02:00
compat
doc avformat/mov: add interleaved_read option 2023-09-14 18:49:51 +08:00
ffbuild
fftools fftools/ffmpeg: do not fail on AVERROR(EAGAIN) from choose_output() 2023-09-14 10:44:05 +02:00
libavcodec avcodec/vp3: Fix undefined pointer arithmetic 2023-09-18 02:55:14 +02:00
libavdevice avutil/imgutils: Add wrapper for av_image_copy() to avoid casts 2023-09-12 09:42:27 +02:00
libavfilter avfilter/x86/af_afir: add FMA3 SIMD 2023-09-17 11:11:24 +02:00
libavformat avformat: add CRI USM demuxer 2023-09-17 11:17:55 +02:00
libavutil avutil/hwcontext_vulkan: Cosmetics 2023-09-15 02:38:14 +02:00
libpostproc
libswresample
libswscale
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tests avcodec/idctdsp: Avoid inclusion of avcodec.h 2023-09-11 00:26:34 +02:00
tools tools/patcheck: Remove test for ancient INIT_VLC_USE_STATIC 2023-09-11 00:26:34 +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 means to alter decoded audio and video through a directed graph of connected 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.