quietvoid
commented
2 years ago There's a bug with Deband when the first requested frame does not use the filter, but the 2nd one does. But it's present in current master, so I don't think it's caused by changes in the PR.
It's reproduceable with this script
import vapoursynth as vs
from vapoursynth import core
clip = core.imwri.Read('01.png')
clip = clip.resize.Spline36(format=vs.YUV420P8, matrix_s="709")
src = core.placebo.Deband(clip)
clip = core.std.Interleave([clip, src])
clip = core.placebo.Resample(clip, 2560, 1280)
clip = clip * 10
clip.set_output()When loading an unfiltered frame first, then previewing a debanded frame, it is corrupted. So every other frame is corrupted and looks the same, for some reason.
Image:
edit: It appears to not happen for everyone, and only affects previews.
Still need to test resample and deband outputs.