VP21 - Not using GPU for image scaling?

Todd-A0 wrote on 8/19/2023, 9:37 PM

I zoom in on a Map, Resolve functions normally Vegas is very slow, Resolve is using a reasonable amount of GPU and low CPU, but Vegas uses very low GPU and low CPU. The map zoom is 5 seconds duration, There is a video on lower track that is 10 seconds long , notice how GPU use and encoding speed picks up to normal levels again when only the video is playing

Is this a bug?

@Wolfgang assured me Vegas uses GPU image scaling, but I don't see that here.

This is the image I used https://www.dropbox.com/scl/fi/7jjq6v38b4o1stgoxnshb/njv2nxixjo881-gigapixel-standard-scale-2_00x.png?rlkey=ws9sqcvoo59niwxzt82l8jwn1&dl=0

Comments

3POINT wrote on 8/20/2023, 3:06 AM

The pan/crop tool, which is used for scaling, never has been GPU supported to my knowledge. The pan/crop tool has not undergone any changes since it has been introduced into Vegas. I don't know which GPU image scaling @Wolfgang is referring to.

Unfortunately the PictureInPictureFX, which is GPU supported and could be used also for scaling, is working at project resolution and not source resolution.

jetdv wrote on 8/20/2023, 7:18 AM

@3POINT, place the effect BEFORE Pan/Crop and it should work at the source resolution... Here's an example using the PIP effect.

source:

after Pan/Crop (i.e. normal):

moved to before Pan/Crop:

john_dennis wrote on 8/20/2023, 10:00 AM

Render performance on my system is profoundly affected by the type of source file.

Zooming into gigapixel graphics is definitely something that I would consider rendering to a lossless intermediate.

Todd-A0 wrote on 8/20/2023, 8:41 PM

Thanks for the confirmation, suggestions and testing guys. It does appear to be a very computationally intensive process. Resolves throws a lot of GPU processing at the image, but the render speed is still less than half of the processing the 2nd half containing video alone.

Vegas is doing that pausing thing as seen with hardware encoding with MagixAVC and NVENC but I"M using Voukoder that doesn't have that problem, it looks like Vegas is processing in batches, but with high resolution compressed images it dramatically slows down. I wish it could better utilize the hardware at it's disposal

Gid wrote on 8/20/2023, 8:59 PM

@Todd-A0 Hi, VP20, I used your pic & zoomed in using Pan Crop, this was he result rendering, slow during the zooming then a lot faster for the vid part, I see this 'slowness' because my phone takes quite big pictures that need cropping & the outcome of this post will be useful to me hopefully, , Using PinP & Track motion to zooming was a lot quicker, Just sharing.

Pan/Crop render