Hi,
Looking at the Wiki page, it seems that certain calculations are
turned off by default:
http://wiki.wireshark.org/RTCP
It looks like you will have to add something like "-o
rtcp.heuristic_rtcp=TRUE -o rtcp.show_roundtrip_calculation=TRUE" to
your second command line.
HTH
Abhik
PS: Disclaimer: I know nothing about rtcp... just trying to help. 0:-)
On Thu, Jul 17, 2008 at 12:54 PM, Ammar Lilamwala
<ammar.lilamwala@xxxxxxxxx> wrote:
> hi all
>
> I used the command
>
> tshark -d udp.port==12001,rtcp -e rtcp.ssrc.fraction -e rtcp.ssrc.dlsr -e
> rtcp.ssrc.jitter -R "rtcp" -S -T fields -V >log.txt
> I am getting the rtcp information printed in log.txt file
>
> Can anyone explain as to why when i type the following command i dont get
> any information stored at all?
>
> tshark -d udp.port==12001,rtcp -e rtcp.roundtrip-delay -e rtcp.xr.stats.lost
> -e rtcp.xr.voipmetrics.rfactor -R "rtcp" -S -T fields -V >log.txt
>
> I am guessing that these fields dont exist in the packet thats why? or that
> only the ssrc information can be captured by the display filter.
>
> Should that be the case can you please tell me what i should do if i want to
> calculate the above metrics.
> I tried using the -z option in tshark but it seems to be very complicated. A
> link for the usage of -z option in tshark would also be very helpful.
>
> regards
> ammar
>
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