[FFmpeg-user] 55-Telecine, 2020-04-26 Status Report

[Mark Filipak]

55-Telecine, 2020-04-26 Status Report

55-Telecine for Blu-ray Movies.

55-Telecine works wonderfully for transcoding M2TS movies (for superior display on 60Hz TVs) 
provided that the M2TS streams don't have subtitles and/or are short. I reckon that the limitations 
are due to mishandling of subtitle time stamps by the 'interleave' filter -- I remember reading that 
subtitle packets can span GOPs, and 'interleave' may be assigning bogus PTSs to fragments. The issue 
is under investigation (https://trac.ffmpeg.org/ticket/8626 -- the ticket's title, "pp=linblenddeint 
failure", is stale and no longer applies). The 'interleave' problem prevents me putting 55-telecine 
into general use for Blu-ray movies.

55-Telecine for DVD Movies.

Since Blu-ray M2TSs are closely related to DVD VOBs, one might logically suspect that an 
'interleave' filter problem would manifest for DVDs, too. Unfortunately, an individual VOB is too 
small to test whether individual VOBs are also mishandled. I tried to concatenate VOBs to assemble 
entire DVD movies but, unfortunately, running 'MPlayer -dumpstream' to do the assembly (as was 
recommended) doesn't work properly. The 'MPlayer -dumpstream' problem prevents me putting 
55-telecine into general use for DVD movies.

Regards,
Mark.
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