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Andreas Rheinhardt 2f62a433f2 avfilter: Deduplicate default video inputs/outputs 
Lots of video filters use a very simple input or output:
An array with a single AVFilterPad whose name is "default"
and whose type is AVMEDIA_TYPE_VIDEO; everything else is unset.

Given that we never use pointer equality for inputs or outputs*,
we can simply use a single AVFilterPad instead of dozens; this
even saves .data.rel.ro (8312B here) as well as relocations.

*: In fact, several filters (like the filters in vf_lut.c)
already use the same outputs; furthermore, ff_filter_alloc()
duplicates the input and output pads so that we do not even
work with the pads directly.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-08-07 09:21:13 +02:00
compat w32pthreads: Fix function signature mismatches for CreateThread 2023-08-04 21:51:20 +03:00
doc
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fftools fftools/opt_common: Don't add unnecessary " " 2023-08-02 18:15:34 +02:00
libavcodec avcodec/jpeg2000htdec: Consolidate jpeg2000 spec bits in jpeg2000_bitbuf_refill_backwards() 2023-08-05 19:52:00 +02:00
libavdevice avdevice/pulse_audio_common: Avoid inclusion of avcodec.h 2023-08-05 09:40:06 +02:00
libavfilter avfilter: Deduplicate default video inputs/outputs 2023-08-07 09:21:13 +02:00
libavformat avformat/movenc: fix sample size being zero in pcmC 2023-08-06 16:14:41 +08:00
libavutil intreadwrite: Indicate potential aliasing in AV_RN/AV_WN for Clang/MSVC mode 2023-08-04 21:50:57 +03:00
libpostproc
libswresample libswresample: Prevent out of bounds. 2023-08-02 17:31:13 +02:00
libswscale
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tests fate/mov: add remux PCM to mp4 test 2023-08-06 16:14:41 +08:00
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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.