QTGMC adds artifacts to video?

[sbm_21]

I use QTGMC to deinterlace videos, and some artifact appear on every video, how i can remove this from the video?

My AVISynth script:

AVISource("rawavi", atrack=0)
ConvertToYUV422(interlaced=true)
AssumeTFF()
QTGMC(Preset="Placebo", Border=true, SourceMatch=3, tr0=1, tr1=1, tr2=1, Sharpness=1)
Crop(14, 6, -12, -14, align=false)
Spline64Resize(768,576)
Prefetch(10)

[lordsmurf]

Step 1 is to always run it with the preset=Slower as a control. Does the error still appear?

[NJRoadfan]

The herringbone errors around the RTL logo are likely on the original recording. It looks like dot crawl.

[sbm_21]

Sorry for the late reply. I tried with Slower preset and remove dot crawl with DeDot filter, the error does still appear.