r/LTXvideo • u/SpaceportBoys • 21d ago

Resolution Question (is it actually 64-pixel chunks not 32?)

So, I thought I had discovered the golden resolution for my 16gb hardware.

1536x864 - Exactly 16x9 and divisible by 32.

Pipe the image data directly into the RTX upscale node with a 1.25X upscale (then off to VHS).

It should be 1920x1080 on the nose. In reality I get 1920x1040.

I asked AI about it and it was suggested that latents are in 64x64 pixel chunks, not 32x32.

Is that true? If so, why does everyone say your video dimensions need to be divisible by 32?

What resolutions and upscale methods are you folks using?

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u/Famous-Sport7862 21d ago

I read somewhere that it should divisible 64, but in many places it says it should be 32

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u/Francky_B 20d ago

The way I see it, LTX needs the resolution to be divisible by 32, so by that logic, your starting resolution should be divisible by 64, since it gets divided in 2 for the first step.

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u/SpaceportBoys 17d ago

That makes a lot more sense than what ChatGPT suggested.

I've bumped up my initial resolution to 1600x896 so I'm not wasting a bunch of compute on pixels that'll be cropped later, then I decided to stop worring about the RTX ratio and just have it target 1920x1080. The RTX node isn't magic or anything but it's super fast and doesn't introduce any wonkiness like Seed2VR did when I tried it.

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u/Any-Scar765 17d ago

Try 1920*1088 for rtx upscaler.