Can't see RTCP REMB packets
Hello, I'm trying to view max bitrate fields (BR Exp and BR Mantissa) in the RTCP REMB packets which are filtered as packet type value 206 (payload-specific feedback) and feedback message type value 15 on Wireshark, but I can't see any information past media source SSRC. I captured these packets during a Google Meet call using Firefox.
Here is the packet capture (meet-firefox-Jan10.pcap) and screenshot I attached in the same folder: https://drive.google.com/drive/folder...
I expected to see the RTCP packet in the message format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|V=2|P| FMT=15 | PT=206 | length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of packet sender |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of media source |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unique identifier 'R' 'E' 'M' 'B' |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num SSRC | BR Exp | BR Mantissa |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC feedback |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... |Note: I get an Expert Info (Warning/Protocol): Unknown Application Layer Feedback Type
Thank you so much for any help
Can you share a capture, or at least display the RTCP packet?
I tried attaching an image and attachment but ask.wireshark gives me an error: >60 points required to upload files..
Putting one on a publicly accessible file sharing site and posting the link to it here is the way to go.
Ok I see, I attached a link in the post and here it is also: https://drive.google.com/drive/folder...
Hi, No one has written code to dissect https://datatracker.ietf.org/doc/html... so anything after the Aplication identifyer is unknown to Wireshark. You could write a bug request asking to have it implemented and see if someone picks it up.