[FFmpeg-trac] #10792(undetermined:new): After threaded architecture change, conversion of inputs with DVD subtitles yields incorrect duration and progress is strange

[FFmpeg]

#10792: After threaded architecture change, conversion of inputs with DVD subtitles
yields incorrect duration and progress is strange
-------------------------------------+-------------------------------------
             Reporter:  Marth64      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 After threaded architecture change, conversion of inputs with DVD
 subtitles yields incorrect duration and progress is strange. For longer
 files, ffmpeg will see time as N/A for couple seconds, while bitrate grows
 unrealistically high. In all cases, output duration is printed wrong.

 Discovered this while working on DVD demuxer, but issue is independent of
 the demuxer entirely.

 Can be reproduced with sample file already available:
 https://samples.ffmpeg.org/MPEG-
 VOB/inverse_telecine_problem/vts_01_1.1st_50M.vob

 Also, attached a video showing a more severe example on a longer video.

 How to reproduce:
 {{{
 ffmpeg -probesize 512M -analyzeduration 60000000 -fflags +genpts -i
 vts_01_1.1st_50M.vob -map 0:v -map 0:a -map 0:s -c copy -f matroska
 Parallelissue.mkv
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10792>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker