ColorAdjust ReColor Motion Distortion Issue

[NASS]

Hi Dan,
What you’ve done with Hybrid is truly magnificent.
I wanted to report an issue regarding ColorAdjust with the ReColor option. I’m using the official Hybrid version (Hybrid_2026.03.21.1_SETUP), not the development build and VapoursynthR73_torch_2026.02.26.
The issue that still persists is significant distortions on moving objects when ReColor is enabled. I tried reducing the problem using:

qtgmc.QTGMC(clip, Preset="Very Slow", InputType=3, TR2=2, TFF=False, SourceMatch=0, Lossless=0)

and it reduced the issue a little, but the distortions are still visible.
It’s a shame because this is a really great feature, but this small problem affects the final result. We definitely need to find a solution!

https://drive.google.com/drive/folders/1...KwSv1D5ifD

PS: P.S. In the development version ColorAdjust with the ReColor, there is also a temporal consistency issue across the whole image, similar to a flickering effect from frame to frame + Distortion .

Best regards

[Selur]

tempPreviewVapoursynthFile13_55_30_347.vpy-1307-0.png <- that looks more like some frame interpolation and a coloring issue.
No, debug output, no script, no source sample,... => no way to reproduce the problem or even know what you did.
At least I can't say anything about this, maybe Dan sees this and has some idea,...

Cu Selur

[NASS]

Hi Selur,

I hope you are doing well .

I wanted to share an example script regarding the issue I mentioned with HAVC_ColorAdjust. Maybe it could help identify the source of the problem.

# Imports
import vapoursynth as vs
# getting Vapoursynth core
import sys
import os
core = vs.core
# Import scripts folder
scriptPath = 'C:/Program Files/Hybrid2/64bit/vsscripts'
sys.path.insert(0, os.path.abspath(scriptPath))
# loading plugins
core.std.LoadPlugin(path="C:/Program Files/Hybrid2/64bit/vsfilters/MiscFilter/MiscFilters/MiscFilters.dll")
core.std.LoadPlugin(path="C:/Program Files/Hybrid2/64bit/vsfilters/SourceFilter/LSmashSource/LSMASHSource.dll")
# Import scripts
import vsdeoldify as havc
import validate
# Source: 'C:\Users\NASS\Desktop\LA\restoredcolor.mp4'
# Current color space: YUV420P8, bit depth: 8, resolution: 938x698, frame rate: 24fps, scanorder: progressive, yuv luminance scale: limited, matrix: 709, transfer: bt.709, primaries: bt.709, format: AVC
# Loading ' C:\Users\NASS\Desktop\LA\restoredcolor.mp4Ä using LWLibavSource
clip = core.lsmas.LWLibavSource(source="C:\Users\NASS\Desktop\LA\restoredcolor.mp4 ", format="YUV420P8", stream_index=0, cache=0, prefer_hw=0)
frame = clip.get_frame(0)
# setting color matrix to 709.
clip = core.std.SetFrameProps(clip, _Matrix=vs.MATRIX_BT709)
# setting color transfer (vs.TRANSFER_BT709), if it is not set.
if validate.transferIsInvalid(clip):
clip = core.std.SetFrameProps(clip=clip, _Transfer=vs.TRANSFER_BT709)
# setting color primaries info (to vs.PRIMARIES_BT709), if it is not set.
if validate.primariesIsInvalid(clip):
clip = core.std.SetFrameProps(clip=clip, _Primaries=vs.PRIMARIES_BT709)
# setting color range to TV (limited) range.
clip = core.std.SetFrameProps(clip=clip, _ColorRange=vs.RANGE_LIMITED)
# making sure frame rate is set to 24fps
clip = core.std.AssumeFPS(clip=clip, fpsnum=24, fpsden=1)
# making sure the detected scan type is set (detected: progressive)
clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # scan type: progressive
# adjusting color space from YUV420P8 to RGB24 for vsColorAdjust
clip = core.resize.Bicubic(clip=clip, format=vs.RGB24, matrix_in_s="709", range_in_s="limited", range_s="full")
# stabilize colors using ColorAdjust (HAVC)
clip = havc.HAVC_ColorAdjust(clip, BlackWhiteTune="strong", BlackWhiteMode=6, Strength=1)
# adjusting output color from RGB24 to YUV420P8 for x264Model
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P8, matrix_s="709", range_in_s="full", range_s="limited") # additional resize to match target color sampling
# set output frame rate to 24fps (progressive)
clip = core.std.AssumeFPS(clip=clip, fpsnum=24, fpsden=1)
# output
clip.set_output()
# script was created by Hybrid 2026.03.21.1

[Selur]

Seems like 'ReColor' is blending the wrong frames.
@Dan64: using this file with HAVC_ColorAdjust with ReColor=True the issue seems to be easily reproduceable/visible if vertical movement is present. (even in latest versions)

Cu Selur

[NASS]

Thank you for your feedback selur . Yes, the latest version has some consistency issues. That’s why I switched back to the official version, but for me, the main problem is the “distortions,” and I think they’re caused by the “Strength: Color temporal stabilization strength” setting.

[NASS]

Hi selur, I haven't figured out how to avoid distortion yet.... , Is there a way to use ColorAdjust with ReColor without temporal stabilization? For example, to recolor the video using only the “Recolor” option?

[Selur]

I not think so, but only Dan can answer that for sure.

[NASS]

Thanks, Selur! We’re waiting for Dan

[NASS]

Hi Selur, I was able to solve the problem (chroma_resize), thanks!