Is it possible to render purely based GPU power?

[PtrStruct]

So running a 4090 I would love to see it utilize it. Currently when rendering a video it uses 20% of my GPU and my CPU is at 80 - 100% running a 13900K.

I tried setting the gpu flag to true and setting it to nvidia but that didn't seem to do much.

Is there a reason for this or am I missing something?

a 30 second clip takes about 30-35 minutes.

GPU Utilization. https://i.imgur.com/VQwIW3x.png

- blur
blur: true
blur amount: 1.3
blur output fps: 240
blur weighting: gaussian_sym

- interpolation
interpolate: true
interpolated fps: 960

- rendering
quality: 15
preview: true
detailed filenames: false

- timescale
input timescale: 1
output timescale: 1
adjust timescaled audio pitch: false

- filters
brightness: 1.75
saturation: 1.25
contrast: 1

- advanced rendering
gpu: true
gpu type (nvidia/amd/intel): nvidia
deduplicate: true
custom ffmpeg filters: -c:a copy -pix_fmt yuv420p10le -vf cas=0.6

- advanced blur
blur weighting gaussian std dev: 1
blur weighting triangle reverse: false
blur weighting bound: [0,1]

- advanced interpolation
interpolation program (svp/rife/rife-ncnn): svp
interpolation speed: medium
interpolation tuning: film
interpolation algorithm: 13

[couleurm]

that's some advanced programming challenge to do all of it on the GPU, it's "thousands of cores" are pretty hard to take advantage of efficiently

as for your long render times i don't think custom ffmpeg filters: is appended on top of the custom ffmpeg encoding presets,

consider trying nvenc (or maybe even libx264 with your cpu 🤷‍♂️)

-c:v h264_nvenc -rc constqp -preset p7 -qp 15

also outputting to 240 at 1.3 amount sounds pretty underwhelming, for what usecase are you outputting such a high framerate?

[PtrStruct]

I really appreciate the answer, thanks a bunch! And that's what I figured, I just wasn't sure if there was a standardized way of moving over the workload to the GPU cores, or maybe a library.

as for your long render times i don't think custom ffmpeg filters: is appended on top of the custom ffmpeg encoding presets

So keep it like this I guess? I don't quite follow what you mean by it not being appended on top of the custom ffmpeg encoding presets.

- advanced rendering
gpu: true
gpu type (nvidia/amd/intel): nvidia
deduplicate: true
custom ffmpeg filters: -c:v h264_nvenc -rc constqp -preset p7 -qp 15

"-c:a copy" produces lossless quality right? I really need to look into the flags you can supply.

also outputting to 240 at 1.3 amount sounds pretty underwhelming, for what usecase are you outputting such a high framerate?

It's just much easier working with slow motion edits when the framerate is higher, it produces a much better result in the end as well.

[couleurm]

-c:a copy makes the audio codec be copied over

if you want true lossless you can use -c:v copy, which will give you rawvideo and can't be contained in mp4, with the new blur pre-release you can set the output container to something like mkv or avi

(container is pretty much the video's file extension)

i suggest using utvideo (simpply -c:v utvideowith the avi container, works and decodes fast both on vegas and adobe NLEs

[f0e]

Unfortunately right now there aren't any VapourSynth plugins which support frame blending using the GPU. Interpolation and rendering have support for GPU acceleration, so for those tasks you'll notice a nice speedup, but using the 'blur' option, specifically with a large blur amount and a high amount of input/interpolated frames will result in non-optimal performance.