Frame bobbing after QTGMC

[elektro]

Hi. There is noticeable bobbing (look at the TV logo) of this NTSC video even after using QTGMC. Is there a way to get rid of that annoying frame bobbing?

[davexnet]

Is that your source or the result ?

[elektro]

Is that your source or the result ?

Source (lossless trim with Avidemux). I want to deinterlace it but without that frame bobbing/shimmering.

[davexnet]

THere's a lot of duplicate frames, I'm not surprised it doesn't work well

[elektro]

THere's a lot of duplicate frames, I'm not surprised it doesn't work well

Perhaps the real fps is 23.976

[davexnet]

try this

bwdif(field=-2) # alternative to qtgmc
srestore(frate=24)

[elektro]

try this

bwdif(field=-2) # alternative to qtgmc
srestore(frate=24)

There's a duplicate frame and the bobbing isn't fixed. A temporary solution I found on my own was to use:

QTGMC(Preset="Slow", FPSDivisor=2, MatchPreset="Slow", Sharpness=0.5)
SRestore(23.976)

and save a temporary video as lossless (Huffyuv) and load that temporary video and use

QTGMC(InputType=1, Preset="Fast", Sharpness=0.5)

to stabilize the video. There's still a bit of bobbing but it's way less noticeable. If a better solution is not suggested, I'll use this one. Btw I'm not 100% sure that's the right fps.

[davexnet]

That's good. Yeah I see the bobbing on the attempt I made. My pc too old to run qtgmc unfortunately

[hello_hello]

This convoluted method appeared to work, although I'm not sure I fully understand why, but a quick perusal didn't reveal any repeated frames. I'm pretty sure there's nothing to be lost by downscaling to 720p, but that's up to you.

Sample 1.

SeparateFields()
SelectEven()
nnedi3(dh=true)
QTGMC()
SelectEven()
CropResize(1280,720)

Sample 2 (possibly faster, but I did notice at least one duplicate).

QTGMC()
SRestore(30000.0/1001.0)
CropResize(1280,720)

[hello_hello]

Or what about this?

QTGMC()
SelectEven()
CropResize(1280,720)

[Selur]

Isn't the clip 29.97fps field shifted and a simple TFM() should be used?