Thanks Jaap,

So why isn't the MPEG dissector in the list when I choose "Decode As.." for
a UDP encapsulated stream?  That was the OP's question I believe.

-jp


On Nov 29, 2007 3:11 PM, Jaap Keuter <[EMAIL PROTECTED]> wrote:

> Hi,
>
> No, the intelligence isn't put into the RTP dissector, it's the other
> way around. The MPEG2TS dissectors registers itself with the RTP
> dissector, for payload type 33 (PT_MP2T, RFC 2250). If the RTP dissector
> gets such a payload it's passed to the MPEG2TS dissector.
>
> What could be done is adding a preference to the MPEG2TS dissector to
> set a UDP port number to register on, so that ETH/IP/UDP/MPEG2TS is
> possible.
>
> Thanx,
> Jaap
>
> Jake Peavy wrote:
> > Yes, I also noticed this.  With an RTP encapsulated video stream, the
> > PIDs are decoded.  With a UDP encapsulated video stream, no decocde is
> > possible.
> >
> > Does this mean this intelligence was built into the RTP module?  That
> > seems to go against the whole point of encapsulation.  It would be far
> > better to have a separate MPEGTS dissector - to apply against any type
> > of stream.
> >
> > -jp
> >
> >
> > On Nov 29, 2007 11:06 AM, maurizio simoni <[EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>> wrote:
> >
> >     HI,
> >
> >     MPEG2 Transport Streams packets are not decoded if they are
> >     transported directly over UDP (i.e. if RTP is not present).
> >     Moreover MPEG2TS is not present in the list of protocols in "Decode
> >     As" list, so there is no way to decode MPEG2TS over UDP neither
> >     automatically ( i.e. by automatically detect that the UDP payload is
> >     MPEG2TS) nor manually (that means to add MPEG2TS to "Decode As"
> list)
> >
> >     Mau.
> >     _______________________________________________
> >     Wireshark-users mailing list
> >     Wireshark-users@wireshark.org <mailto:Wireshark-users@wireshark.org>
> >     http://www.wireshark.org/mailman/listinfo/wireshark-users
> >
> >
> >
> >
> > --
> > -jp
> >
> >
>
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>



-- 
-jp


When Chuck Norris was in middle school, his English teacher assigned an
essay: "What is Courage?" Chuck Norris received an "A+" for writing only the
words "Chuck Norris" and promptly turning in the paper.
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