# calculating RTP delay at receiver side since the packet was sent from sender.

**URL:** <https://mediasoup.discourse.group/t/calculating-rtp-delay-at-receiver-side-since-the-packet-was-sent-from-sender/3989>\
**Category:** Off Topic\
**Created:** [March 1, 2022, 7:39am UTC](https://mediasoup.discourse.group/t/calculating-rtp-delay-at-receiver-side-since-the-packet-was-sent-from-sender/3989 "2022-03-01T07:39:39Z")\
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**Author:** ![oto313](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/oto313/32/1254_2.png) [@oto313](https://mediasoup.discourse.group/u/oto313)\
**Post date:** [March 2, 2022, 7:50am UTC](https://mediasoup.discourse.group/t/calculating-rtp-delay-at-receiver-side-since-the-packet-was-sent-from-sender/3989/4 "2022-03-02T07:50:35Z")

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Yeah you cannot use RTCP because it is hop to hop. ibc mentioned it in [Forwarding NTP timestamp from source - mediasoup libraries - mediasoup](https://mediasoup.discourse.group/t/forwarding-ntp-timestamp-from-source/3427/3)

> mediasoup does not relay RTCP packets, it consumes/terminates and produces its own ones as any proper SFU. RTCP protocol is hop by hop, not end to end. This is how things are and how things must be.

You can only get delay by one hop. I personally used RTP extension abs-capture-time to get the required delay

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