Support forum for DG Tools

Hello Donald,

may I know why DGDecNV can cut only in 4px steps? AviSynth support 2px and even 1px if I am correct. Would be big problem to modify DGDecNV to support 2px cropping step ?

Thanks for reply!

Sorry but it is not supported by the nVidia driver.

So if any of upcoming drivers will change to support 2px cropping you will add it, right?

Did you try ask nVidia guys why they have set limit to 4px cropping step? Do you think it is any kind of hardware architecture limit?

No I didn't ask them and I don't know the reason for the limitation although I could speculate about it.

To be honest, I try to limit my demands on my contact at nVidia to what I see as significant matters. If I get too demanding of their time it can perhaps affect their responsiveness to me. You are of course welcome to approach them about it.

Understand.

I would ask them but dont have any personal contact on any nvidia guy.

Also I am not sure how properly compile the question. I dont know their cuda sdk and dont uderstand what part is related to cropping limits... If you will help me build correctly the question I will ask them

Why is this so important to you?

I dont like loose more pixel lines of the picture than it is necessary

For example if only 1px should be removed I have to remove 4px, it is too much. With 2px step I would be much more satisfied. Also it will be easier to get better pixel aspect ratio error after resize if I will have smaller steps in cropping.

Why don't you crop with Avisynth? You can crop to mod 2 width/height (Avisynth 2.6). You can crop 1px if you're cropping from two opposite sides. You can crop by 1px if you're resizing to 720p with Spline36. You can FillMargin 1px if you can't crop it.
And I didn't mention the million other things you can do with Avisynth but can't do with CUVID.

I know this. But I use private gui which support cutting over DGDecNV and it is very comfortable for me. Make cropping via Avisynth would crack my automated processing

You'll have to take it up with nVidia.

What API from SDK should I discuss with them ? Which API is responsible for the cropping feature?

CUVID.

Is or will be DGDecIM able crop in 2px steps??

It's too early to know. I haven't experimented with Intel Media cropping/resizing yet.

Hope I dont make you angry if I try ressurect this topic .

I know you told me that you dont want bother your contact inside nvidia. But I guess your DGDecNV is quite finished and bugfree . Nothing much to improve so maybe it is time to ask your nVidia contact about the cropping limitations to 4px steps. And if they plan release any updated version of CUDA SDK wich would add support for cropping in 2px steps.

Thanks for try

The best I can do is allow 2 pixel cropping but subject to the constraint that the width must be mod 4. That way you could crop 2 pixels from both sides but not 2 pixels from one side. Is that good enough for you?

Yes, it would be enough for me

Thanks!

Re-download 2048. Open it and immediately close it (puts new option in the INI file). Then edit the INI file and set Fine_Cropping=1. Advise me if you find any of these: