pion
How to deal remote ssrc-group SIM with FID
Your environment.
- Version: v3.1.11
- Browser: Android 9
What did you do?
I want implement a sfu-server with Pion.Pion is offer and remote android is answer.Using once signal request.The android peer using simulcast with 3 ssrc(and there is no rid in any track).And each simulcast ssrc has two FID ssrcs.And the android SDP is about below format
...
a=rid:1748680504 send
a=rid:1748680506 send
a=rid:1748680508 send
a=simulcast:send 1748680504;1748680506;1748680508
...
a=ssrc-group FID 1748680504 1748680505
a=ssrc:1748680504 cname:pion_1_0
a=ssrc:1748680504 msid:pion_1_0 sim_1_0
a=ssrc:1748680504 mslabel:pion_1_0
a=ssrc:1748680504 label:sim_1_0
a=ssrc:1748680505 cname:pion_1_1
a=ssrc:1748680505 msid:pion_1_1 sim_1_1
a=ssrc:1748680505 mslabel:pion_1_1
a=ssrc:1748680505 label:sim_1_1
...
a=ssrc-group FID 1748680506 1748680507
a=ssrc:1748680506 cname:pion_2_0
a=ssrc:1748680506 msid:pion_2_0 sim_2_0
a=ssrc:1748680506 mslabel:pion_2_0
a=ssrc:1748680506 label:sim_2_0
a=ssrc:1748680507 cname:pion_2_1
a=ssrc:1748680507 msid:pion_2_1 sim_2_1
a=ssrc:1748680507 mslabel:pion_2_1
a=ssrc:1748680507 label:sim_2_1
...
a=ssrc-group FID 1748680508 1748680509
a=ssrc:1748680508 cname:pion_3_0
a=ssrc:1748680508 msid:pion_3_0 sim_3_0
a=ssrc:1748680508 mslabel:pion_3_0
a=ssrc:1748680508 label:sim_3_0
a=ssrc:1748680509 cname:pion_3_1
a=ssrc:1748680509 msid:pion_3_1 sim_3_1
a=ssrc:1748680509 mslabel:pion_3_1
a=ssrc:1748680509 label:sim_3_1
...
What did you expect?
I hope the ssrc in FID can be handled(1748680505 1748680507 1748680509).Now it just deal ssrc in SIM.
What happened?
Incoming unhandled RTP ssrc(1748680505) Incoming unhandled RTP ssrc(1748680507) Incoming unhandled RTP ssrc(1748680509)
Hi @ChenMoGe2
What version of WebRTC are you using with Android?
Can you try with commit 0180ee38051dec890fdfa6220a532984d685555f ? This may have regressed with ef285fbe0917d83e69898fae4bcc68eab221eba4
