TCmullet
3rd July 2025, 21:53
For years, I've used DGBOB(order=1,mode=1,thresh=12,ap=false) to convert interlaced TV video (29.97fps) to progressive 59.94 fps. But then last year, I discovered QTGMC would do that AND do much desirable cleanup. I did experiment with custom settings a bit, but found that the best settings were the default ones. So I use:
QTGMC(Preset="slow").prefetch(4)
However, I have a very old video (actually many) that QTGMC seems to be causing an artifact that DGBOB does not. These 2 images (attached) are frames next to each other in the 59.97 fps stream. Look at the background wall, particularly above the desk lamp and also to the right of it. Look for the pink areas in contrast with the yellow. In the other pic, the locations of the two colors are reversed. If you were to step forward thru the video (in Vdub), you'd see it ping pong back and forth alternating between pink blotches in certain areas, then they swap positions with the yellow in the next frame.
This video was shot on VHS in 1987 and the camcorder was already very old and worn. I was a little surprised to observe that DGBOB smooths it over temporally. But I want the "clean up" effects of QTGMC and therefore don't want to revert to DGBOB. Does anyone here know the options of QTGMC well enough to know if there's a tweak I can make that will kill this intraframe flicker? I feel if I can't stop it, it will be very tiring on my viewers' eyes, especially as each show goes over an hour. (And I really don't want to use DGBOB.)
QTGMC(Preset="slow").prefetch(4)
However, I have a very old video (actually many) that QTGMC seems to be causing an artifact that DGBOB does not. These 2 images (attached) are frames next to each other in the 59.97 fps stream. Look at the background wall, particularly above the desk lamp and also to the right of it. Look for the pink areas in contrast with the yellow. In the other pic, the locations of the two colors are reversed. If you were to step forward thru the video (in Vdub), you'd see it ping pong back and forth alternating between pink blotches in certain areas, then they swap positions with the yellow in the next frame.
This video was shot on VHS in 1987 and the camcorder was already very old and worn. I was a little surprised to observe that DGBOB smooths it over temporally. But I want the "clean up" effects of QTGMC and therefore don't want to revert to DGBOB. Does anyone here know the options of QTGMC well enough to know if there's a tweak I can make that will kill this intraframe flicker? I feel if I can't stop it, it will be very tiring on my viewers' eyes, especially as each show goes over an hour. (And I really don't want to use DGBOB.)