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Originally Posted by paradoxical
You're dealing with purely interlaced credits. If you single-rate deinterlace it it will not be as smooth for the reason I told you.
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When I bobbed the part to see what the fields looked like, it turned out to be even too much FUBAR for that... it made a little jump every 3rd or 4th field (with no discernable pattern alas), which fields also had a better quality than the others. So I tried Bob + SelectEvery(2000,140,144,147,150,154,157,161,164,168,171,174,...) (all the "good" fields), hoping I could maybe interpolate the missing frames, but it still didn't look good enough.
So I cut my losses, completely remade the part (pasted screenshots together, replaced the text & rolled it with Avisynth's Animate), and now it's totally clean, 23.976fps and in far less time than I've already spent on it.
New script (which, to my utter surprise, worked right the first time):
v1=Trim(0,314091).Telecide(guide=1,post=2,vthresh=25).Decimate(5)
v2=AVISource("G:\DVD\GLAEQ\newscroll_720x480.avi") #Q=2, grayscale, no B-frames
v3=Trim(315067,318853).Telecide(guide=1,post=2,vthresh=25).Decimate(5)
UnalignedSplice(v1,v2,v3)
It's just that I had hoped there was some easy MagicCreditRollDeinterlace(mode="SalesBinDVD",quality="perfect",24000,1001) plugin that I had overlooked...
Quote:
Originally Posted by manono
Why do the credits even have to be 23.976fps? If for DVD you can keep them interlaced. If for something else you can use a container that supports VFR and at least keep them 29.97, if not interlaced.
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I'm not backing up to DVD but to both crf=18 .mp4 (for best quality) and .avi (because my decrepit standalone player & my decrepit too-old-to-steal-so-safe-to-bring-during-long-hospital-stays laptop can't play mp4s) without letterboxes, pillarboxes and other black stuff around the image. I always do the avi first and if it's OK, I run exactly the same script with MeGUI for the .mp4.
A VFR mp4 would be a possibility, yes... I'll keep that in mind for a backup that's really worth it.
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Why telecide them if they were never telecined in the first place?
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Just one of the gazillion things I've tried. I was in the "try random stuff / you never know" stage, which 1 out of 20 times even produces decent results. Sometimes.
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Use a regular deinterlacer. QTGMC can add a motion blur to make them appear to play more smoothly at 29.97fps. It's a bobber so add a SelectEven afterwards to get it back to 29.97fps.
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Thank you, nice tip, I'll try that on my next DVD with interlaced credits (there's still a LOT).
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Your V2 is more jumpy not only because you made it progressive, but because you slowed it down (a very bad idea, in my opinion), thus emphasizing the jerkiness.
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I also tried it without telecide. If it's smooth enough at 29.97fps, it should also be smooth enough if I slow it down to 23.976fps (instead of decimating, which would make it REALLY jumpy). True, that part would become a bit longer then, but I snipped off a bit from the end of v1, which was all black anyway, to compensate for the longer v2.
Anymoo, thank you all for your time!