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[Didier Barvaux <question644900@xxxxxxxxxxxxxxxxxxxxx>]

Question #644900 on rohc changed:
https://answers.launchpad.net/rohc/+question/644900

    Status: Open => Answered

Didier Barvaux proposed the following answer:
Hello,

1. What is the exact error message ?

2. It is not straight forward. There is no UDP port dedicated to RTP
streams. So, you cannot rely on fixed-value UDP port. You may get the
UDP ports and IP addresses from SIP exchanges if you rely on SIP to
establish your RTP streams. Or, you may perform some DPI (Deep Packet
Inspection) to identify RTP flows within UDP flows. There are some basic
DPI algorithms in the test tools of the ROHC library. Have a look at
them.

Regards,
Didier

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