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Andreas Rheinhardt 8aabcf6c11 avformat/matroskaenc: Don't segfault when seekability changes If the Matroska muxer's AVIOContext was unseekable when writing the header, but is seekable when writing the trailer, the code for writing the trailer presumes that a dynamic buffer exists and tries to update its content in order to overwrite data that has already been preliminarily written when writing the header, yet said buffer doesn't exist as it has been written finally and not preliminarily when writing the header (because of the unseekability it was presumed that one won't be able to update the data anyway). This commit adds a check for this and also for a similar situation involving updating extradata with new data from packet side-data. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>		5 years ago
compat	compat/avisynth: remove avisynth headers	5 years ago
doc	avutil: bump version after addition of av_sat_add64 and av_sat_sub64	5 years ago
ffbuild	common.mak: Also clean Windows debug files.	5 years ago
fftools	fftools/ffmpeg: use local variable with same contents directly	5 years ago
libavcodec	avcodec/frame_thread_encoder: check for frame threading codec cap instead of intra only	5 years ago
libavdevice	avdevice/v4l2enc: Allow writing non-rawvideos to v4l2.	5 years ago
libavfilter	avfilter/vsrc_sierpinski: unbreak configuring rate value	5 years ago
libavformat	avformat/matroskaenc: Don't segfault when seekability changes	5 years ago
libavresample	…
libavutil	lavc/qsvdec: add decode support for HEVC 4:2:2 8-bit and 10-bit	5 years ago
libpostproc	…
libswresample	…
libswscale	swscale: aarch64: Add a NEON implementation of interleaveBytes	5 years ago
presets	…
tests	checkasm: swscale: Fix running the hscale test on 32 bit x86	5 years ago
tools	tools/target_dec_fuzzer: Adjust threshold for PNG and APNG	5 years ago
.gitattributes	…
.gitignore	…
.mailmap	mailmap: fix 3-address entries	5 years ago
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CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
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Changelog	avfilter/vf_scdet: add filter to detect scene change	5 years ago
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	MAINTAINERS: Add myself to libopenh264enc	5 years ago
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README.md	…
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configure	avfilter/vf_scdet: add filter to detect scene change	5 years ago

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.