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Niklas Haas 66845cffc3 avcodec/h264dec: apply H.274 film grain Because we need access to ref frames without film grain applied, we have to add an extra AVFrame to H264Picture to avoid messing with the original. This requires some amount of overhead to make the reference moves work out, but it allows us to benefit from frame multithreading for film grain application "for free". Unfortunately, this approach requires twice as much RAM to be constantly allocated for ref frames, due to the need for an extra buffer per H264Picture. In theory, we could get away with freeing up this memory as soon as it's no longer needed (since ref frames do not need film grain buffers any longer), but trying to call ff_thread_release_buffer() from output_frame() conflicts with possible later accesses to that same frame and I'm not sure how to synchronize that well. Tested on all three cases of (no fg), (fg present but exported) and (fg present and not exported), with and without threading. Co-authored-by: James Almer <jamrial@gmail.com> Signed-off-by: Niklas Haas <git@haasn.dev> Signed-off-by: James Almer <jamrial@gmail.com>		2021-08-24 09:58:52 -03:00
compat	…
doc	avformat/matroskaenc: Pass dispositions through unchanged by default	2021-08-24 04:23:29 +02:00
ffbuild	…
fftools	fftools/cmdutils: Switch to avfilter_filter_pad_count()	2021-08-20 14:29:15 +02:00
libavcodec	avcodec/h264dec: apply H.274 film grain	2021-08-24 09:58:52 -03:00
libavdevice	…
libavfilter	avfilter/avfilter: add a return at the end of a non-void function	2021-08-24 09:36:21 -03:00
libavformat	avformat/matroskaenc: Only compile functions when needed	2021-08-24 04:23:50 +02:00
libavutil	avcodec/h264_slice: compute and export film grain seed	2021-08-24 09:58:52 -03:00
libpostproc	…
libswresample	…
libswscale	…
presets	…
tests	avformat/matroskaenc: Pass dispositions through unchanged by default	2021-08-24 04:23:29 +02:00
tools	tools/dvd2concat: use option keyword	2021-08-22 11:44:17 +02:00
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.travis.yml	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	avcodec: add SMC encoder	2021-08-18 08:55:56 +02:00
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	…
Makefile	FATE: add a test for sliced scaling	2021-08-08 19:26:05 +02:00
README.md	…
RELEASE	…
configure	…

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.