Is QTGMC InputType=1 destructive?

[LaserBones]

I'm encoding a television show. After deinterlacing, several of the episodes have a shimmer in certain scenes of the episode. QTGMC InputType=1 cleans this up nicely. That said it's taking me a lot of time to go through every episode. Is QTGMC InputType=1 destructive? I would like to filter all episodes with QTGMC InputType=1 to save time but if it is destructive I'll check each episode.

[Sharc]

How did you deinterlace, to begin with? With QTGMC or something else?

[lollo]

And more, are you sure you need to deinterlace at first? Many TV Shows are not interlaced. Add then apply additional QTGMC with progressive settings?

Post a sample of the source

[Selur]

Yes, like (as good as) every filter out there, QTGMC with InputTpe=1 can cause issues depending on the source and the other settings.

[LaserBones]

How did you deinterlace, to begin with? With QTGMC or something else?

QTGMC(Preset="medium")

[LaserBones]

And more, are you sure you need to deinterlace at first? Many TV Shows are not interlaced. Add then apply additional QTGMC with progressive settings?

Post a sample of the source

It's a telecined animation with some scenes and credits completely interlaced. I'm bobing them to keep the additional 59.94fps motion in the areas where it is interlaced. There is also a lot of dot crawl which QTGMC is fixing. Here is a clip of a scene I'm dealing with that has some shimmering. Look at the books/magazines in the back after using QTGMC(Preset="medium"). Filtering with QTGMC InputType=1 after deinterlacing fixes this.

[jagabo]

QTGMC(InputType=1) does eliminate the shimmering but it does causes some sharpening and mild damage to other parts of the picture. You can eliminate the sharpening with Sharpness=0. You can interleave() before and after and use an editor to step back and forth between the two.

# output of your QTGMC()
Interleave(last, QTGMC(InputType=1, Sharpness=0)

I use VirtualDub2 to view the results and Windows Magnifier to zoom in 4x. Judge for yourself whether it's a problem.

The better fix would be to use TFM().TDecimate().ChangeFPS(60000,1001) on the parts that IVTC cleanly, then trim and paste the IVTC and QTGMC sections together.