Is there a free deinterlacer that's better than QTGMC?

[Hypersonic1]

QTGMC is a horrible deinterlacer because each frame shifts up or down by a line, which causes the video to flicker slightly. Is there a better deinterlacer out there?

[poisondeathray]

QTGMC is a horrible deinterlacer because each frame shifts up or down by a line, which causes the video to flicker slightly. Is there a better deinterlacer out there?

Maybe your source is the problem or you didn't use it correctly ?

Normal interlaced video has a field offset. Each subsequent field goes up/down/up/down . A "smart" deinterlacer fixes this. A "dumb" deinterlacer leaves you with up/down motion similar to what you are describing

Overall there isn't a better deinterlacer. Overall, QTGMC is the best for most situations (there are some exceptions).

But if your source has special characteristics you might have to take another approach

[poisondeathray]

And if you post a sample, someone will probably make some suggestions as what would be appropriate for your specific video

[LigH.de]

The bobbing is quite intentional. But it should not be visible; instead, it should be filtered and blended while constructing the full frames.

I once had some visible flickering too, but it was caused by either outdated plugins or an unfortunate combination of calling parameters, I don't know for sure; but I got it fixed, and now QTGMC produces rock-stable results even for text screens with narrow stems.

[hello_hello]

QTGMC is a horrible deinterlacer because each frame shifts up or down by a line, which causes the video to flicker slightly. Is there a better deinterlacer out there?

I've seen QTGMC do some odd things, but it's pretty rare and probably requires a non-typical source. I remember a video with a scene in a living room where there was an open fire burning, and for some reason QTGMC caused the fire-place to bob up and down while everything around it remained still, but I use QTGMC quite regularly and your experience definitely isn't typical. You probably should upload a small sample.

[Hypersonic1]

The field order is correct, but why am I still having problems?

[KarMa]

deleted

[LMotlow]

The field order is correct, but why am I still having problems?

Can't say. Your test.mp4 sample has been processed. We need to see a pieces of the original.

[jagabo]

You need to add SwapFields() before QTGMC(). But need to see the source to say for sure.

[Hypersonic1]

You need to add SwapFields() before QTGMC().

That fixed the problem. Thanks!