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

FFmpeg trac at avcodec.org
Tue Mar 31 18:40:46 EEST 2020


#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 markfilipak):

 Thanks for having some discussion.

 Well, Richard, you can see it for yourself.
 ffmpeg -i IN.M2TS -vf "telecine=pattern=5555,bwdif=mode=send_frame"
 -avoid_negative_ts 1 -c:v libx265 -crf 20 -preset medium -c:a copy -c:s
 copy OUT.MKV

 It works wonderfully for BD content, but not soft-telecined DVD content
 due to the error in 'telecine'.

 With 2-3-2-3 pull-down, 2 of 5 frames are combed and the combed frames
 adjoin.
 With 5-5-5-5 pull-down, 2 of 10 frames are combed but the combed frames
 are separated by 4 progressive frames.

 In other words, there's no noticable judder and decombing is not needed
 due to the 1/60th second duration of the combed frame.

 In other words, 'telecine' works as advertised for BDs, but not for DVDs.
 Now, why would that be, eh?

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Ticket URL: <https://trac.ffmpeg.org/ticket/8590#comment:8>
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