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FFmpeg git repo
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Anton Khirnov 46cbe4ab5c fftools/cmdutils: split stream specifier parsing and matching 
This approach has the major advantage that only parsing can fail (due to
a malformed specifier or memory allocation failure). Since parsing is
done generically, while matching is per-option, this will allow to
remove substantial amounts of error checking code in following commits.

The new code also explicitly allows stream specifiers to be followed by
additional characters, which should allow cleaner handling of optional
maps, i.e. -map <stream_specifier>?, which is currently implemented in a
hacky way that breaks when the stream specifier itself contains the '?'
character (this can happen when matching metadata). It will also allow
further extending the syntax, which will be useful in following commits.

This introduces some minor behaviour changes:
* Matching metadata tags now requires the ':' character in keys or
  values to be escaped. Previously it could not be present in keys, and
  would be used verbatim in values. The change is required in order to
  know where the value terminates.
* Multiple stream types in a single specifier are now rejected - such a
  specifier makes no sense.
* Non-existent stream group ID or index is now ignored with a warning
  rather than causing a failure. This is consistent with program
  handling and is required to make matching fail-free.
 		2024-08-13 10:28:54 +02:00
compat
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doc libavutil: deprecate the old Vulkan queue API, add doc/APIchanges entries 2024-08-11 05:13:15 +02:00
ffbuild
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fftools fftools/cmdutils: split stream specifier parsing and matching 2024-08-13 10:28:54 +02:00
libavcodec avcodec/avcodec_internal: fix type definition for the new functions 2024-08-12 23:10:48 -03:00
libavdevice avdevice/dshow: Initialize 2 pointers 2024-08-11 13:21:16 +02:00
libavfilter avfilter/video: don't zero allocated buffers if memory poisoning is used 2024-08-12 11:41:38 -03:00
libavformat avformat/movenc: don't look at previous track_id as it may not be set 2024-08-12 11:41:38 -03:00
libavutil hwcontext_vulkan: ignore false positive validation errors 2024-08-11 05:13:18 +02:00
libpostproc
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libswresample
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libswscale sws/riscv: depend on RVB and simplify accordingly 2024-08-05 21:16:26 +03:00
presets
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tests tests/iamf: match stream group by id in some tests 2024-08-12 11:41:38 -03:00
tools tools/target_dec_fuzzer: Use av_buffer_allocz() to avoid missing slices to have unpredictable content 2024-08-10 15:04:46 +02:00
.gitattributes
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.gitignore
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.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
CONTRIBUTING.md
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COPYING.GPLv2
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COPYING.GPLv3
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COPYING.LGPLv2.1
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COPYING.LGPLv3
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CREDITS
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Changelog lavc/qsvdec: Add VVC decoder 2024-07-30 13:40:21 +08:00
INSTALL.md
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LICENSE.md
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MAINTAINERS MAINTAINERS: add myself as d3d12va_encode maintainer 2024-07-10 18:10:08 +02:00
Makefile add tools/target_swr_fuzzer 2024-08-08 15:26:52 +02:00
README.md
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RELEASE
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configure configure: check if assembler supports RV zicbop 2024-07-30 18:41:51 +03:00

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 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.