You've already forked FFmpeg
mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-08-10 06:10:52 +02:00
5002829416
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>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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.