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galinart 5002829416 libavcodec/qsvenc: enable Hyper Encode 
Hyper Encode uses Intel integrated and discrete graphics on one system
to accelerate encoding of a single video stream.
Depending on the selected parameters and codecs, performance gain on AlderLake iGPU + ARC Gfx up to 1.6x.

More information: https://www.intel.co.uk/content/www/uk/en/architecture-and-technology/adaptix/deep-link.html
Developer guide: https://github.com/oneapi-src/oneVPL-intel-gpu/blob/main/doc/HyperEncode_FeatureDeveloperGuide.md

Hyper Encode is supported only on Windows and requires D3D11 and oneVPL.

To enable Hyper Encode need to specify:
-Hyper Encode mode (-dual_gfx on or dual_gfx adaptive)
-Encoder: h264_qsv or hevc_qsv
-BRC: VBR, CQP or ICQ
-Lowpower mode (-low_power 1)
-Closed GOP for AVC or strict GOP for HEVC -idr_interval = 0 used by default

Depending on the encoding parameters, the following parameters may need
to be adjusted:
-g recommended >= 30 for better performance
-async_depth recommended >= 30 for better performance
-extra_hw_frames recommended equal to async_depth value
-bf recommended = 0 for better performance

In the cases with fast encoding (-preset veryfast) there may be no
performance gain due to the fact that the decode is slower than the encode.

Command line examples:

ffmpeg.exe -init_hw_device qsv:hw,child_device_type=d3d11va,child_device=0 -v verbose -y -hwaccel qsv -extra_hw_frames 60 -async_depth 60 -c:v h264_qsv -i bbb_sunflower_2160p_60fps_normal.mp4
-async_depth 60 -c:v h264_qsv -preset medium -g 60 -low_power 1 -bf 0 -dual_gfx on output.h265

Signed-off-by: galinart <artem.galin@intel.com>
2023-01-30 08:48:58 +08:00
compat
doc avfilter: add VA-API variants of the stack filters 2023-01-30 08:48:58 +08:00
ffbuild
fftools fftools/ffmpeg: add an AVClass to MuxStream/OutputStream 2023-01-29 09:12:22 +01:00
libavcodec libavcodec/qsvenc: enable Hyper Encode 2023-01-30 08:48:58 +08:00
libavdevice
libavfilter avfilter: add VA-API variants of the stack filters 2023-01-30 08:48:58 +08:00
libavformat avformat/mxfdec: check number of index table entires more strictly 2023-01-29 18:58:30 +01:00
libavutil avutil/hwcontext_mediacodec: fix backward compatibility 2023-01-26 23:31:37 +08:00
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Changelog avfilter: add VA-API variants of the stack filters 2023-01-30 08:48:58 +08:00
configure avfilter: add VA-API variants of the stack filters 2023-01-30 08:48:58 +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.