Hi Mozilla guys,

I encovered that incoming audio traffic packets has a SSRC than is not used in 
remote SDP, but anyway the sound is audible. Is it a bug ?

See ssrc == 2891593250 below:


Remote SDP

v=0
o=- 392585836 2 IN IP4 127.0.0.1
s=-
t=0 0
a=sendrecv
a=group:BUNDLE audio-1234567890
a=group:BUNDLE video-0
a=ice-options:trickle
a=msid-semantic:WMS *

m=audio 1 RTP/SAVPF 102 18 9 116 115 117 114 113 99 96 112 111 8 0
c=IN IP4 192.168.125.117
a=candidate:806243803 1 UDP 67107848 212.24.35.119 8000 typ host generation 0
a=candidate:806243803 2 UDP 67107848 212.24.35.119 8000 typ host generation 0
a=candidate:806243803 1 UDP 67107848 212.24.35.119 8000 typ host generation 0
a=candidate:806243803 2 UDP 67107848 212.24.35.119 8000 typ host generation 0
a=sendrecv
a=end-of-candidates
a=fingerprint:sha-256 
DF:CE:7C:2C:A2:88:C6:C8:37:F4:8C:C3:BA:3B:DB:32:BA:F7:5D:60:4E:C7:D1:AC:DB:BB:DD:AA:1A:C2:65:4E
a=ice-pwd:85da6c3240b64ab86c13900529ab0e84
a=ice-ufrag:0047USER
a=mid:audio-1234567890
a=msid:MSID-announcement-part-conf-cname-a-xxx 
MSTIDAUDIO-announcement-part-conf-cname-a-xxx
a=rtcp:1 IN IP4 0.0.0.0
a=rtcp-mux
a=rtpmap:102 ip-mr_v2.5/16000/1
a=rtpmap:18 G729/8000/1
a=rtpmap:9 G722/8000/1
a=rtpmap:116 G722/16000/1
a=rtpmap:115 G722/16000/1
a=rtpmap:117 G722/8000/1
a=rtpmap:114 G7221/16000/1
a=rtpmap:113 G7221/16000/1
a=rtpmap:99 speex/16000/1
a=rtpmap:96 speex/8000/1
a=rtpmap:112 SILK/16000/1
a=rtpmap:111 SILK/8000/1
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=setup:active
a=ssrc:1234567890 cname:conf-cname-a-xxx

m=video 1 RTP/SAVPF 100 46 40
c=IN IP4 192.168.125.117
b=TIAS:500000
a=candidate:806243803 1 UDP 67107848 212.24.35.119 9000 typ host generation 0
a=candidate:806243803 2 UDP 67107848 212.24.35.119 9000 typ host generation 0
a=candidate:806243803 1 UDP 67107848 212.24.35.119 9000 typ host generation 0
a=candidate:806243803 2 UDP 67107848 212.24.35.119 9000 typ host generation 0
a=sendrecv
a=end-of-candidates
a=fingerprint:sha-256 
DF:CE:7C:2C:A2:88:C6:C8:37:F4:8C:C3:BA:3B:DB:32:BA:F7:5D:60:4E:C7:D1:AC:DB:BB:DD:AA:1A:C2:65:4E
a=ice-pwd:bb076ded449d2fd22195e71b0e4f3730
a=ice-ufrag:0047USER
a=mid:video-0
a=rtcp:1 IN IP4 0.0.0.0
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack
a=rtcp-fb:100 nack pli
a=rtcp-mux
a=rtpmap:100 VP8/90000
a=rtpmap:46 VP8-SVC/90000
a=rtpmap:40 H263-1998/90000
a=setup:active

RTP Stats

inbound_rtp_audio_0

Jitter-buffer delay: 81 ms

Local: 17:48:08 GMT+0300 (Russia TZ 2 Standard Time) inboundrtp SSRC: 
2891593250 Received: 192 packets (32.25 Kb) Lost: 0 Jitter: 0.01
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