[FFmpeg-trac] #8512(undetermined:open): The Vulkan based filter scale_vulkan does not work on NVIDIA hardware.

[FFmpeg]

#8512: The Vulkan based filter scale_vulkan does not work on NVIDIA hardware.
-------------------------------------+-------------------------------------
             Reporter:  Brainiarc7   |                    Owner:  philipl
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by philipl):

 * owner:   => philipl
 * status:  new => open


Comment:

 You need to tell the decoder to actually output to GPU memory - by default
 hwaccel always copies back to system memory.

 So here's an example that decodes with nvdec, scales with vulkan and
 encodes with nvenc, all in GPU memory with no copy back to system memory.
 If you want to encode with a software encoder, then you need the
 hwdownload,format=nv12 at the end instead of the second hwupload.

 {{{
 ffmpeg -hwaccel nvdec -hwaccel_output_format cuda -i in.mp4
 -init_hw_device cuda=cuda:0 -filter_hw_device cuda -vf
 hwupload=derive_device=vulkan,scale_vulkan=w=1920:h=1440,hwupload=derive_device=cuda
 -c:v hevc_nvenc out.mp4
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8512#comment:4>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker