[FFmpeg-devel] [RFC] ffmpeg: default to single thread when hwaccel is active

[Dennis Mungai]

On Wed, 29 Sept 2021 at 20:22, Timo Rothenpieler <timo at rothenpieler.org>
wrote:

> On 29.09.2021 19:17, Dennis Mungai wrote:
> > A potential downside to this would be on QSV's side, which needs at least
> > 2  threads to prevent dead-locking, see
> >
> https://github.com/Intel-Media-SDK/MediaSDK/blob/master/_studio/mfx_lib/scheduler/linux/src/mfx_scheduler_core_ischeduler.cpp#L90-L93
>
> Is that even controlled by the avcodec threads parameter?
> I can't find any occurrence of "numberOfThreads" anywhere in the entire
> codebase.
>
>
See this patchwork:
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20210408070929.860244-1-haihao.xiang@intel.com/
Submitted  by Haihao Xiang, CC'ed herein.