[FFmpeg-trac] #8590(undetermined:closed): 'telecine=pattern' error for p24, soft telecined sources

[FFmpeg]

#8590: 'telecine=pattern' error for p24, soft telecined sources
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             Reporter:  markfilipak  |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by pdr0):

 Replying to [comment:32 markfilipak]:
 >
 >
 > -snip-
 > > > The reason I say it's twitter, not judder, is that if you do the
 calculations of average temporal location of the temporal center of the
 pictures and their durations, the cadence really is
 1/15s-1/15s-1/15s-1/15s.
 > >
 > > "twitter" is a reserved term for something else
 >
 > It is. It is? I've not found a definition for "twitter", though it's
 cited a lot. Got a link?



 "Twitter" is what kids use these days...joking :). It's a term that
 describes moire and aliasing artifacts in motion . The most common cause
 is interlace and deinterlacing artifacts for poor quality deinterlacing,
 but there are other causes.  If you click on the "show" on the wikipedia
 link, you can see simulated buzzing line "twitter" artifacts . I assumed
 you were looking at the correct file with blend deinterlacing. I wouldn't
 describe that as "twitter" . The combed version would be closer, but still
 not quite what you would call twitter
 https://en.wikipedia.org/wiki/Interlaced_video#Interline_twitter


 I guess it comes down personal preference. I'm not a fan of the combed
 version either; to me it's the worst overall because the artifacts are too
 overpowering to ignore. Out of the 3, I prefer the original , maybe
 because I grew up with it in North America. There is judder, but you can
 live with it.  (It was mentioned earlier, these days, cheap judder free
 TV's are quite common,  but I'll leave it at that)

 And I did find a ffmpeg blend deinterlacer, -vf pp=lb blend deinterlaces
 everything, non selectively. Not sure how to apply it selectively in
 ffmpeg. But if you're happy with combed version, you're not going to
 pursue it anyways

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Ticket URL: <https://trac.ffmpeg.org/ticket/8590#comment:34>
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