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RTP packet delay

Hello, i want to ask how to calculate transmission delay for every RTP packet that was captured by Wireshark ?

There Time Delta from previous captured packet frame value in Wireshark, can we represent this value as the delay value of the packet?

Delay on an RTP packet is calculated by looking at the processing time at the sender + transmission time + processing time at the receiver. Can the delta value represent the sender processing time + transmission time, so the packet delay can be calculated by adding up the delta value with receiver's processing time ?

Anybody can help, thanks

Hilman's avatar
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Hilman
asked 2020-05-06 05:00:34 +0000
grahamb's avatar
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grahamb
updated 2020-11-04 08:45:29 +0000
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To see the delays of an RTP packet you need to look at the RTCP packet. Most systems report it in RTCP. There is two actions required. In your captured trace select any RTCP packet, then right click on mouse, Select "Protocol Preferences" then select " Show relative roundtrip calculation" Secondly now apply a Display filter: rtcp.roundtrip-delay You can use the following to see all packets that exceeds the RTP threshold of 300ms RTT. rtcp.roundtrip-delay > 300

gielo's avatar
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gielo
answered 2020-11-04 08:19:46 +0000
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The roundtrip-delay field can also be added as a column, right click the field in any packet where it's visible and select Apply as Column.

grahamb's avatar grahamb (2020-11-04 08:47:19 +0000) edit
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