stab() with zero range

[Graven]

I would have thought that stab() with a range of zero would have a placebo effect, but on the test video I tried it appears to have a significant effect (i.e. 2-3% increase) on the resulting lossless encoded video size.   Not that I can see it visually, mind you.  Is this to be expected?

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Ahhh, setting range=1 gives the same file size ... so maybe 0 is just treated as 1