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IDProjectCategoryView StatusDate SubmittedLast Update
0001767DCP-o-maticBugspublic2020-06-13 13:032020-11-30 20:36
Reportercarl Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
Status confirmedResolutionopen 
Summary0001767: Error with particular mp4 with unusual frame timing
Description

Detected as 45fps, then things go wrong if you set the video rate to 29.97 and seek towards the end of the file.

TagsNo tags attached.
Branch
Estimated weeks required
Estimated work requiredUndecided

Activities

carl

2020-06-13 13:03

administrator   ~0003846

cr/projects@lyntoncinema.org.uk/Iceland 1.mp4

carl

2020-11-30 20:12

administrator   ~0004034

ffprobe reports 45 for tbr.

carl

2020-11-30 20:34

administrator   ~0004035

PTS in this file are very strange:

OK V    frame 0.000000 counted 0
OK V    frame 0.044010 0.044010 0.044010 22.722109 21 indices 1/1
OK V    frame 0.067014 0.067014 0.023004 43.470701 25 indices 2/2
OK V    frame 0.111024 0.111024 0.044010 22.722109 26 indices 3/3
OK V    frame 0.132986 0.132986 0.021962 45.533194 26 indices 4/3
OK V    frame 0.178038 0.178038 0.045052 22.196573 26 indices 5/5
OK V    frame 0.200000 0.200000 0.021962 45.533194 26 indices 6/5
OK V    frame 0.244010 0.244010 0.044010 22.722109 26 indices 7/7
OK V    frame 0.267014 0.267014 0.023004 43.470701 26 indices 8/8
OK V    frame 0.311024 0.311024 0.044010 22.722109 26 indices 9/9
OK V    frame 0.332986 0.332986 0.021962 45.533194 26 indices 10/9
OK V    frame 0.378038 0.378038 0.045052 22.196573 26 indices 11/11
OK V    frame 0.400000 0.400000 0.021962 45.533194 26 indices 12/11
OK V    frame 0.444010 0.444010 0.044010 22.722109 26 indices 13/13
OK V    frame 0.467014 0.467014 0.023004 43.470701 26 indices 14/13
OK V    frame 0.511024 0.511024 0.044010 22.722109 26 indices 15/15
OK V    frame 0.532986 0.532986 0.021962 45.533194 26 indices 16/15
OK V    frame 0.578038 0.578038 0.045052 22.196573 26 indices 17/17
OK V    frame 0.600000 0.600000 0.021962 45.533194 26 indices 18/17
OK V    frame 0.644010 0.644010 0.044010 22.722109 26 indices 19/19
OK V    frame 0.667014 0.667014 0.023004 43.470701 26 indices 20/19

carl

2020-11-30 20:35

administrator   ~0004036

So the timing alternates between frames; two frames are apart by a time roughly corresponding to 22.7 fps, then the next one is apart by a time corresponding to 43.5 fps.

carl

2020-11-30 20:36

administrator   ~0004037

Taking this off 2.16.0 as the file just looks a bit too crazy to worry a great deal about.

Bug History

Date Modified Username Field Change
2020-06-13 13:03 carl New Bug
2020-06-13 13:03 carl Note Added: 0003846
2020-11-30 20:12 carl Note Added: 0004034
2020-11-30 20:34 carl Note Added: 0004035
2020-11-30 20:35 carl Note Added: 0004036
2020-11-30 20:35 carl Status new => confirmed
2020-11-30 20:35 carl Target Version 2.16.0 =>
2020-11-30 20:35 carl Summary Error with particular mp4 => Error with particular mp4 with unusual frame timing
2020-11-30 20:35 carl Estimated work required => Undecided
2020-11-30 20:35 carl Priority immediate => normal
2020-11-30 20:36 carl Note Added: 0004037