[FFmpeg-devel] [PATCH] lavc/qsvdec: allow qsv decoders to use initialized device

[Soft Works]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Soft Works
> Sent: Wednesday, September 2, 2020 5:33 AM
> To: FFmpeg development discussions and patches <ffmpeg-
> devel at ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvdec: allow qsv decoders to use
> initialized device
> 
> 
> 
> > -----Original Message-----
> > From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> > Dmitry Rogozhkin
> > Sent: Wednesday, September 2, 2020 4:44 AM
> > To: ffmpeg-devel at ffmpeg.org
> > Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com>
> > Subject: [FFmpeg-devel] [PATCH] lavc/qsvdec: allow qsv decoders to use
> > initialized device
> >
> > qsv decoders did not allow to use devices explicitly initialized on
> > the command line and actually were using default device. This starts
> > to cause confusion with intel discrete GPUs since in this case decoder
> > might run on default integrated GPU device (/dev/dri/renderD128) and
> > encoder on the device specified on the command line
> (/dev/dri/renderD129).
> >
> > Example:
> > ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD129 -init_hw_device
> > qsv=hw at va \
> >   -c:v h264_qsv -i input.h264 -c:v hevc_qsv -y output.h264
> >
> 
> Hi Dmitry,
> 
> How about this:
> 
> -init_hw_device qsv=vad:hw_any,child_device=/dev/dri/renderD128
> 

I apologize, I picked the wrong thing. The qsv_device parameter is what allows setting the device for a QSV decoder:

fmpeg -qsv_device /dev/dri/renderD128 -c:v:0 h264_qsv -hwaccel:v:0 qsv -i INPUT ....

Kind regards,
softworkz