Beiträge von Samwise Gamgee

If you would like to put a bounty on this, I would definitely be willing to fill it, for what it's worth.

I am certain that this is possible. Indeed, in ffmpeg currently such behavior is fairly easy to do. I believe that the difficulty with Premiere/Vegas/etc. will be getting the frame to decode at all on the GPU more than anything else, but I could be wrong. My current frameserver method has to decode frames on the CPU sadly, but the rest is done entirely on the GPU - but you might be able to do everything on the GPU with your method.

https://docs.nvidia.com/video-technolo…cceleration.pdf

https://developer.nvidia.com/blog/nvidia-ff…nscoding-guide/

These seem to be the most immediately relevant.

Currently, the way I do it, using avisynth+, 64-bit ffmpeg, and 64-bit debugmode frameserver, is as follows:

frameserver.avs

AviSource("frameserver.avi")
ConvertToYUV444()

ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i frameserver.avs -filter:v "hwupload_cuda,scale_npp=w=2560:h=1440:interp_algo=lanczos" -c:v hevc_nvenc -rc vbr -cq 24 -qmin 24 -qmax 24 -level 6.2 -profile:v rext -y output.mkv

It would be nice if we could get the full suite of nvdec/cuda filters. I am most interested in scale_npp myself, but there's a whole host of these: transpose_npp, scale_cuda、yadif_cuda、thumbnail_cuda、overlay_cuda...