If there's video that someone put up on Youtube but they didn't know to deinterlace it first and it has the resulting comb lines - is there a way to fix this if you only have access to the uploaded video?
I'm envisioning something that separates the video into fields and aligns those fields to get rid of the combing and turn it into proper progressive video.
Thanks!
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Yes, but not 100 percent. Link?
Last edited by jagabo; 12th Dec 2020 at 08:34.
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Yes, I've seen such videos. But different ones require different treatment depending on how much they've been resize, what resizing algorithm, etc.
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This one?
https://www.youtube.com/watch?v=-mdd-ASeCOc
Motorbike at 2:03 and various quick motion aeroplane passes? -
That one was uploaded at 720x576 and resized by YouTube to 600x480. They don't have anything between 480 and 720 so it was downsized. The resizing screwed up the interlacing and it can't be fixed. brassplyer is in the US so that kind of screwup probably didn't happen. But there could be other kinds of screwups preventing a proper deinterlace or IVTC,
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With one like that you can blur away the comb artifacts but you'll be left with blending and a blurrier picture. Blending looks a little better than comb artifacts but it's still not great.
Before and after Spline36Resize(width,288).Spline36Resize(width,hei ght) (zoomed in 4x with a PointResize):
[Attachment 56216 - Click to enlarge]
To alleviate the blurring of other parts of the frame I've used a mask to limit the blurring only to areas where comb artifacts appear.
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