[FFmpeg-trac] #8522(avformat:open): DASH start segment number calculation is wrong for fragment_duration mode

[FFmpeg]

#8522: DASH start segment number calculation is wrong for fragment_duration mode
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             Reporter:  onitake     |                    Owner:  stevenliu
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  dash        |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by onitake):

 @stevenliu Were you able to test with the URL I sent you?
 I'm not sure how long I can keep this stream online.

 If you have a possibility to set up a DASH stream yourself, the important
 points to trigger the issue are:

 availabilityStartTime="1970-01-01T00:00:00Z"
 publishTime="2020-02-10T14:02:08Z" (or any other value !=
 "1970-01-01T00:00:00Z")

 If you want to have the exact same setup, you also need to set:

 timescale="48000"
 duration="288000"

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Ticket URL: <https://trac.ffmpeg.org/ticket/8522#comment:8>
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