To replay a previously captured RTP stream in SIPp, you have to use
pcap_play_audio. Only packets belonging to the stream must be present in
the pcap file replay, so in Wireshark, you must apply a display filter
to display only packets belonging to that stream out of the original
capture (such as rtp.ssid == 0x12345678), and then use File -> Export
Specified Packets -> Displayed to save these packets to a new pcap file.
Wireshark does not look at the payload of the RTP, only to payload type
number, so the payload may actually be G.729 but if the payload type
number says it is PCMA, Wireshark will display it as such. Try the
Wireshark RTP player - if you can hear the original audio, the payload
type number and the actual payload match each other, otherwise they don't.
P.
Dne 21.4.2018 v 10:10 hema...@advaitamtech.com napsal(a):
Hello All,
I wanted to send G729 encoded RTP packets from my SIPP UAS, I tried it
by putting only the g729 nedia attribute in the SDP of 200 OK and by
sending G729 encoded files. I did encoding using below methods.
1) By downloading a PCM wav file and converting to .g729 file using
online tool
2) By using my G729 support Voip Client and capturing the RTP packets
whicg is G729 encoded.
I tried sending above files, Both cases SIPP UAS sending it as PCMA
encoded RTP packets only, When i verified it in wireshark capture
SIPP software version i am using is 3.4.1,
Can you please help to send G729 encoded RTP packets from my SIPP UAS
Thanks & Regards
Hemanth
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