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

[FFmpeg]

#8590: 'telecine=pattern' error for p24, soft telecined sources
-------------------------------------+-------------------------------------
             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            |
-------------------------------------+-------------------------------------

Comment (by pdr0):

 Replying to [comment:19 markfilipak]:
 >
 >
 > May I reitterate that 'telecine=pattern=5555' works correctly for p24
 progressive (BD) video (i.e., 24/1.001 FPS video).




 Not with that command line.  You are mistaken. It's not working like you
 think it is.

 May I reiterate I tested this on 2 BD's,  24.0p and 23.976p variants (yes
 they come in both, NTSC DVD is 23.976 only)

 The actual output from that commandline is 3:2 frame repeats. There is no
 combing


 {{{
 AaAaAa,BbBb,CcCcCc,DdDd
 }}}


 You can reproduce it on a simple animation too if you're worried about
 copyright. I uploaded a 23.976p animation "23.976p.mp4" and the
 23.976_OUT.mkv


 {{{
 ffmpeg -i 23.976p.mp4 -vf "telecine=pattern=5555,bwdif=mode=send_frame"
 -avoid_negative_ts 1 -c:v libx265 -crf 20 -preset medium -an
 23.976_OUT.MKV
 }}}


 If you look closely, you see the addition deinterlacing artifacts from
 bwdif  cehoyos  was referring to. There is a slight shimmer. If you check
 it frame by frame you can't miss it. The text has  aliased edges from
 bwdif . This isn't part of "cadence" discussion, but you're degrading the
 footage, with no benefit

 Cadence wise, it's exactly as I described earlier.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8590#comment:21>
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