[FFmpeg-trac] #11444(avformat:new): Overflow-2 in start_time_realtime calculation in rtsp.c

[FFmpeg]

#11444: Overflow-2 in start_time_realtime calculation in rtsp.c
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:  (none)
  IncrediBlame                       |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  start_time_realtime RTSP RTCP      |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by Jack Lau):

 * cc: Jack Lau (added)
 * component:  ffmpeg => avformat

Comment:

 Hi,

 I'm trying to reproduce this issue, but not meet any wrong result, the
 s->start_time_realtime is always right. Current date `UTC time: 2025-04-06
 11:58:27.173080 UTC` printed very well

 So can you give me more details about this overflow? can you provide the
 value of rtpctx->first_rtcp_ntp_time so i can test?
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Ticket URL: <https://trac.ffmpeg.org/ticket/11444#comment:1>
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