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Philip Langdale 2f9b8bbd1f lavu/hwcontext_vulkan: support mapping VUYX, P012, and XV36 
If we want to be able to map between VAAPI and Vulkan (to do Vulkan
filtering), we need to have matching formats on each side.

The mappings here are not exact. In the same way that P010 is still
mapped to full 16 bit formats, P012 has to be mapped that way as well.

Similarly, VUYX has to be mapped to an alpha-equipped format, and XV36
has to be mapped to a fully 16bit alpha-equipped format.

While Vulkan seems to fundamentally lack formats with an undefined,
but physically present, alpha channel, it has have 10X6 and 12X4
formats that you could imagine using for P010, P012 and XV36, but these
formats don't support the STORAGE usage flag. Today, hwcontext_vulkan
requires all formats to be storable because it wants to be able to use
them to create writable images. Until that changes, which might happen,
we have to restrict the set of formats we use.

Finally, when mapping a Vulkan image back to vaapi, I observed that
the VK_FORMAT_R16G16B16A16_UNORM format we have to use for XV36 going
to Vulkan is mapped to Y416 when going to vaapi (which makes sense as
it's the exact matching format) so I had to add an entry for it even
though we don't use it directly.
2022-09-03 16:19:40 -07:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc lavu/pixfmt: Add P012, Y212, XV30, and XV36 formats 2022-09-03 16:19:40 -07:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffmpeg_opt: Check creation of new program 2022-09-01 14:26:01 +02:00
libavcodec lavc/vaapi: Add support for remaining 10/12bit profiles 2022-09-03 16:19:40 -07:00
libavdevice avutil/internal: Move avpriv-file API to a header of its own 2022-09-03 15:41:44 +02:00
libavfilter avfilter/vf_bilateral_cuda: refactor use of pow to simple multiplication 2022-09-03 20:27:34 +02:00
libavformat avutil/internal: Move avpriv-file API to a header of its own 2022-09-03 15:41:44 +02:00
libavutil lavu/hwcontext_vulkan: support mapping VUYX, P012, and XV36 2022-09-03 16:19:40 -07:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample lswr: take const AVChannelLayout* in swr_alloc_set_opts2() 2022-08-24 18:31:05 -05:00
libswscale libswscale: add support for VUYX format 2022-08-25 19:03:49 -07:00
presets
tests lavu/pixfmt: Add P012, Y212, XV30, and XV36 formats 2022-09-03 16:19:40 -07:00
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Changelog lavc/vaapi: Add support for remaining 10/12bit profiles 2022-09-03 16:19:40 -07:00
configure avfilter: add bilateral_cuda filter 2022-09-03 15:18:56 +02:00
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MAINTAINERS MAINTAINERS: Add ED25519 key for signing my commits in the future 2022-08-09 21:57:31 +02:00
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RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

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.