On Ma, 2024-01-22 at 20:32 +0000, Mark Thompson wrote: > On 17/01/2024 07:36, Xiang, Haihao wrote: > > From: Haihao Xiang <haihao.xi...@intel.com> > > > > This makes '-init_hw_device opencl' work in a multiple-device system. > > Under what circumstances is this more useful than the existing behaviour which > prompts the user to select the device they intend?
@item -init_hw_device @var{type}[=@var{name}][:@var{device}[,@var{key=value}...]] My understanding is that only @var{type} is mandatory, @var{device} (and others) is optional, indeed '-init_hw_device opencl' works well in a single-device system, however the same command doesn't work in a multiple-device system. It is not a good experience for me. > > There is no particular ordering to devices, the first one is just random. > Having your process fail with an opaque message (because the device picked > lacks some operation) or run many times slower than expected (because the > smallest device happened to be first in the list) or do something different on > a machine which looks the same (because it has an extra driver for something > else) rather than just saying up front that there are multiple devices and the > user needs to pick seems worse to me, since it is much harder to see where the > problem is. I understand your concern, how about making the default works while prompting a warning about the device selection ? Thanks Haihao _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".