Re: [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 dericed):

 @rmk, thanks for this explanation. The source file, at internet archive,
 is the file produced from a Log&Capture process within Final Cut. This
 should be a common type of container use with Final Cut and production
 environments. Your idea of using the last atom makes sense and reminded me
 of this ticket: https://ffmpeg.org/trac/ffmpeg/ticket/1137. Here a
 Quicktime file is edited in Quicktime and saved. The 'save' changes the
 original moov to free and appends a new moov to the file. Using the last
 moov atom may fix this issue too.

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Re: [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.

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Re: [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):

 uploaded as duplicate-track-display.mov

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Re: [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):

 Replying to [comment:5 cehoyos]:
 > Did you read http://ffmpeg.org/bugreports.html ?
 yes, which part are you referring to?

 > A small sample is nice, but if you only have a larger one, please
 upload.
 Ok, I will upload the file.

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Re: [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
-+-
Changes (by cehoyos):

 * cc: rmk (added)


Comment:

 Replying to [comment:4 rmk]:
 > I also have a file that exhibits that behaviour tested with a rather old
 ffmpeg version (>4 months) and now with current git master. It is too
 large to attache it though.
 Did you read http://ffmpeg.org/bugreports.html ?
 A small sample is nice, but if you only have a larger one, please upload.

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Re: [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 also have a file that exhibits that behaviour tested with a rather old
 ffmpeg version (>4 months) and now with current git master. It is too
 large to attache it though. Do you need another sample? If so I can try to
 reproduce a smaller one.

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Re: [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 dericed):

 As I reported on ffmpeg-user I tested this file in a number of
 applications and only found this error in ffmpeg.

 VLC shows correct number of tracks.
 mediainfo shows the correct number of tracks.
 Quicktime shows the correct number of tracks.
 muxmovie shows the correct number of tracks.
 Dumpster (Quicktime tool to review container structure) shows the correct
 number of tracks.
 ... and ...
 ffmbc shows the correct number of tracks.

 ffmpeg lists every track twice.

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Re: [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
-+-
Changes (by cehoyos):

 * reproduced:  0 => 1


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Re: [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:  0
-+-
Changes (by cehoyos):

 * keywords:  quicktime => mov
 * status:  new => open


Comment:

 Not a regression, afaict.

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