Quote:
Originally Posted by Warner306
I also notice cropped videos (such as 1916 vs. 1920) cause madVR to work much harder. At 1080p -> 1080p, I was able to disable scaling of these files under zoom control to keep madVR from creeping over the rendering queue. I haven't noticed the same for 720p content, but I haven't been watching for strangely-cropped 720p videos.
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The cost of scaling is a function of number of input pixels and number of output pixels. So given a fixed output resolution, the higher the input res, the more work there is to do.
So keeping that in mind, scaling only a few pixels from 1916 to 1920 is the most expensive scaling operation it could do - especially if it otherwise wouldn't have to scale at all.
If it has to scale anyway, like from 720p -> 1080p, then cropping first doesn't add any extra cost to the scaling.