Wireshark-bugs: [Wireshark-bugs] [Bug 5208] New: RTP dynamic payload type can not be dissected c
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Mon, 13 Sep 2010 08:27:31 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5208

           Summary: RTP dynamic payload type can not be dissected
                    correctly in a RTSP session
           Product: Wireshark
           Version: 1.4.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: qiangxiong.huang@xxxxxxxxx


Build Information:
Version 1.4.0 (SVN Rev 34005 from /trunk-1.4)
--
In a RTSP session, RTP dissector can be correctly invoked according to RTSP
Transport header (client_port and server_port). 

But the dynamic payload of RTP can not be dissected according to RTSP/SDP's
mime type.

For example, RTSP/SDP contains line "a=rtpmap:96 H264/90000", but RTP packets
still show: "Payload type: DynamicRTP-Type-96 (96)", and H264 dissector is not
invoked. You have to set Edit->Preferences->Protocols->H264's dynamic types to
96 to invoke H264 dissector.

I have checked the source code, packet-h264.c has register the h264 dissector
to rtp's "rtp_dyn_payload_type" table.

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