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Adam Chelminski 715f63232f avcodec/libvpxenc: Apply codec options to alpha codec context 
When encoding yuva420 (alpha) frames, the vpx encoder uses a second
vpx_codec_ctx to encode the alpha stream. However, codec options were
only being applied to the primary encoder. This patch updates
codecctl_int and codecctl_intp to also apply codec options to the alpha
codec context when encoding frames with alpha.

This is necessary to take advantage of libvpx speed optimizations
such as 'row-mt' and 'cpu-used' when encoding videos with alpha.
Without this patch, the speed optimizations are only applied to the
primary stream encoding, and the overall encoding is just as slow
as it would be without the options specified.

Signed-off-by: Adam Chelminski <chelminski.adam@gmail.com>
Signed-off-by: James Zern <jzern@google.com>
2021-09-08 18:48:00 -07:00
compat compat/cuda: add __expf() implementation 2021-08-14 15:06:47 +02:00
doc libavutil/hwcontext_d3d11va: adding more texture information to the D3D11 hwcontext API 2021-09-08 17:48:02 -03:00
ffbuild avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
fftools fftools/cmdutils: Use %c, not %s to write a single char 2021-09-05 11:55:01 +02:00
libavcodec avcodec/libvpxenc: Apply codec options to alpha codec context 2021-09-08 18:48:00 -07:00
libavdevice avdevice/decklink: support for more duplex mode for Decklink 8K Pro 2021-08-16 10:00:39 +08:00
libavfilter libavfilter/vf_deinterlace_qsv: enabling d3d11va support, added mfxhdlpair 2021-09-08 17:48:32 -03:00
libavformat avformat/rtpdec: Make ff_rtp_handler_iterate() static 2021-09-08 22:59:14 +02:00
libavutil libavutil/hwcontext_d3d11va: adding more texture information to the D3D11 hwcontext API 2021-09-08 17:48:02 -03:00
libpostproc postproc/postprocess: Remove legacy cruft 2021-07-29 22:02:06 +02:00
libswresample (postproc|swresample)/version: Don't include libavutil/avutil.h 2021-07-29 22:02:05 +02:00
libswscale libswscale/swscale: initialize all dst plane pointers in sws_receive_slice() 2021-09-07 09:44:58 -03:00
presets
tests fate/wma: Account for trimmed samples in wmapro-ism test 2021-09-02 19:59:34 +02:00
tools tools/dvd2concat: use option keyword 2021-08-22 11:44:17 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088' 2019-03-14 15:53:16 -03:00
Changelog avcodec/siren: MSN Siren decoder 2021-09-07 18:07:11 +10:00
configure avformat: add an AV1 Low overhead bitstream format muxer 2021-09-01 19:55:30 -03:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS avformat: add Argonaut Games CVG demuxer 2021-05-12 20:25:50 +10:00
Makefile FATE: add a test for sliced scaling 2021-08-08 19:26:05 +02:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00

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 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.