1 Topic by Nintendo Maniac 64 (edited by Nintendo Maniac 64 07-11-2017 08:11:16)

Topic: SVPcode - can it take a 4k 4:2:0 video and output 1080p 4:4:4?

As you may know, a 3840x2160 video with 4:2:0 chroma sub-sampling will have a chroma resolution of 1920x1080.  Since I was going to resize a 4k video down to 1080p anyway, I was wondering if SVPcode could manage to do that without also reducing the chroma resolution?

Now I realize that SVP's interpolation engine itself works at 4:2:0, so the interpolation would have to be processed and applied at the original 4k resolution - that's fine.  I'd just like to know if, after that interpolation process, SVPcode can then downscale the video without reducing the chroma resolution.


I imagine that the processing chain would look something like this:

4k 4:2:0 video -> interpolation -> downscale -> 1080p 4:4:4 video

Re: SVPcode - can it take a 4k 4:2:0 video and output 1080p 4:4:4?

it doesn't sounds like a feature for a "one-button-click converter"
use StaxRip if you want unusual things wink

3 Reply by Nintendo Maniac 64 (edited by Nintendo Maniac 64 07-11-2017 09:11:23)

Re: SVPcode - can it take a 4k 4:2:0 video and output 1080p 4:4:4?

Well I was told that SVPcode can already downsize a video: http://www.svp-team.com/forum/viewtopic.php?pid=66768

So perhaps the question should be - can that resize function work without downsizing the chroma resolution as well?


EDIT:
Perhaps I should mention that I know that I could easily use SVPcode to only encode the 4k 30fps video into 4k 60fps and then use a different program to then downsize to 1080p with 4:4:4 chroma, but I figured I might as well ask and see if it's possible to do it all in one step and save at least a bit of time (I'm only running a Pentium G3258, not a Threadripper 1950X)

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Re: SVPcode - can it take a 4k 4:2:0 video and output 1080p 4:4:4?

it can downsize a video exactly the same way as for real-time processing - _before_ the frame rate conversion

nothing can stop you from modifying scripts to add custom Vapoursynth code after the conversion

5 Reply by Nintendo Maniac 64 (edited by Nintendo Maniac 64 07-11-2017 09:18:56)

Re: SVPcode - can it take a 4k 4:2:0 video and output 1080p 4:4:4?

Ah, OK.  So I guess I'll have to downscale with a different program unless I directly encode to a format that's non-demanding enough that even at 4k 60fps can be decoded in software via an i5-520M (because the discrete NNvidia NVS 3100M can't do 4k hardware decoding).

EDIt:

Chainik wrote:

nothing can stop you from modifying scripts to add custom Vapoursynth code after the conversion

Except my lack of any sort of coding knowledge! tongue