[FFmpeg-trac] #5309(ffplay:open): Seek doesn't work in some .mp4 files in ffplay

[FFmpeg]

#5309: Seek doesn't work in some .mp4 files in ffplay
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             Reporter:  Arnaud         |                    Owner:  (none)
                 Type:  defect         |                   Status:  open
             Priority:  normal         |                Component:  ffplay
              Version:  git-master     |               Resolution:
             Keywords:  h264 mov seek  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
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Changes (by MasterQuestionable):

 * cc: MasterQuestionable (added)

Comment:

 ͏    Essentially such referencing could be still represented with Closed
 GOP...
 ͏    Note the final referencing is certain: not changing randomly.

 ͏    Probably the Open GOP design is to support certain really unusual
 fringe cases:
 ͏    Where 1 GOP would like to reference part (not all) of other GOP.
 ͏    And using the big GOP containing all is somehow unacceptable.

 ͏    However there doesn't seem to be much valid cases for such usage.
 ͏    Plus the apparent havoc of general interop.
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Ticket URL: <https://trac.ffmpeg.org/ticket/5309#comment:19>
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