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[BUG] SVT-AV1 + Vapoursynth encode error
#4
Yes it fixes the issues.


There's another thing: The "yuv420 chroma location" setting in vapoursynth, sometimes it isn't applied correctly?

for example:

source yuv420p8
yuv420 chroma location left in VS
Filters: SMDegrain (Gimmick YUV444P16) -> KNLMeansCL(plane RGB)
output yuv420p10

result:

# Adjusting color sampling to YUV444P16 for vsSMDegrainGimmick clip = core.resize.Bicubic(clip=clip, format=vs.YUV444P16, chromaloc=0) # removing grain using SMDegrain clip = smdegrain.SMDegrain(clip, tr=1, interlaced=False) # adjusting color space from YUV444P16 to RGB48 for vsKNLMeansCL clip = core.resize.Bicubic(clip=clip, format=vs.RGB48, matrix_in_s="709", range_in_s="limited", range_s="full") # denoising using KNLMeansCL clip = core.knlm.KNLMeansCL(clip, channels="RGB", device_id=0) # adjusting output color from RGB48 to YUV420P10 for SvtAv1Model clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10, matrix_s="709", range_in_s="full", range_s="limited", dither_type="error_diffusion")

I think chromaloc=0 should be in the last line?
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RE: SVT-AV1 + Vapoursynth encode error - by andrewschen - 20.08.2026, 19:05

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