[FFmpeg-trac] #5970(undetermined:new): No valid multicast port obtained from RTSP

[FFmpeg]

#5970: No valid multicast port obtained from RTSP
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             Reporter:  ioeir2       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  rtsp crash   |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by ioeir2):

 Yes, the issue is reproducible on the latest master ffmpeg.
 The problem is that ffmpeg/ffplay incorrectly obtains port for udp
 multicast from SDP. Actually it cannot obtain it all and uses port 0,
 which causes the crash.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5970#comment:4>
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