[FFmpeg-trac] #1378(undetermined:open): ffmpeg lists every track in a QuickTime file twice

[FFmpeg]

#1378: ffmpeg lists every track in a QuickTime file twice
-------------------------------------+-------------------------------------
             Reporter:  dericed      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mov          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
-------------------------------------+-------------------------------------

Comment (by rmk):

 I think the file I uploaded should probably be considered broken as it
 contains two moov atoms, which was probably a bug in ffmbc 0.6, which was
 used to create the file. I could not find anything in the Quicktime spec
 explicitly disallowing this but think it's probably a bug. However,
 ignoring a second moov atom in a file and logging a warning should not be
 too hard to do and would be a bit more robust as these files seem to be OK
 for Quicktime player.
 The original Final Cut Pro file also has two moov atoms but maybe in that
 case it is a sort of security measure used by the capturing application in
 case the capturing is interrupted to write a moov once in a while so at
 least the data captured until that point is readable (just a guess but the
 layout seems weird with lots of "free" atoms that internally look like a
 moov). in that case it would make sense to use the last moov atom one
 finds but this needs further investigation.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1378#comment:8>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker