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25th July 2024, 08:24 | #1 | Link |
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[FFMPEG] how to exploit all available GPUs ?
Hi there, I've recently tested encoding performances on an a friend's MSI Stealth GS77 - 12U laptop: when the process was done with one of the GPUs, the other remained unused - although it still consumed some power (neither goes totally idle) and of course produce heat - and vice versa.
As for the title: how - if possible - write a command line to assign the Intel iGPU to decode source video stream and Nvidia dGPU to the encoding workload only (and, why not, vice-versa) ? Thanks in advance to anyone that can/will help.
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25th July 2024, 13:16 | #2 | Link |
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This is maybe done first in BIOS (enable MSI Hybrid), then in Windows Graphic settings: Hardware Accelerated GPU On (means nVidia), then assign apps. Here on a hybrid iGPU/dGPU system (Clevo) it more or less works.
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25th July 2024, 13:56 | #3 | Link |
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I've only got a single GPU (Vega on Raven Ridge), but the following used the GPU for both decoding and encoding:
Code:
ffmpeg -hwaccel d3d11va -i INPUT.mp4 -c:v hevc_amf OUTPUT Code:
ffmpeg -hwaccel d3d11va -i INPUT.mp4 -c:v h264_nvenc OUTPUT ffmpeg -hwaccel qsv -i INPUT.mp4 -c:v h264_nvenc OUTPUT |
Tags |
cuda, ffmpeg, intel, nvidia, qsv |
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