Hi,
I´m not able to get simulcast to work in Firefox anymore (Firefox 85).
It is not working on the simulcast demo page nor on my setup using the latest multistream branch.
What happens is that only one layer is available, layer 0 but it contains the highest quality stream.
If I change scaleDownBy for the 'h' stream it affects the stream that comes over as layer 0.
This is the offer:
v=0
o=mozilla...THIS_IS_SDPARTA-85.0 8574740104654817562 0 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-25654:3E:6A:4E:41:EE:14:7D:77:3E:3D:5C:09:16:0D:C7:F4:79:35:EE:F5:51:8A:81:40:3C:48:CB:95:50:EA:2A
a=group:BUNDLE 0
a=ice-options:trickle
a=msid-semantic:WMS *
m=video 9 UDP/TLS/RTP/SAVPF 120 124 121 125 126 127 97 98
c=IN IP4 0.0.0.0
a=sendonly
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:5 urn:ietf:params:rtp-hdrext:toffset
a=extmap:8/sendonly urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
a=extmap:9/sendonly urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id
a=fmtp:126 profile-level-id=42e01f;level-asymmetry-allowed=1;packetization-mode=1
a=fmtp:97 profile-level-id=42e01f;level-asymmetry-allowed=1
a=fmtp:120 max-fs=12288;max-fr=60
a=fmtp:124 apt=120
a=fmtp:121 max-fs=12288;max-fr=60
a=fmtp:125 apt=121
a=fmtp:127 apt=126
a=fmtp:98 apt=97
a=ice-pwd:a7e50c0b6cee558e83f865b1fe6aa305
a=ice-ufrag:3ff44f98
a=mid:0
a=msid:{e550529c-f462-4f87-9305-0e6ee98fa6c6} {9481f3c4-7674-4429-939b-ca9eafc5af73}
a=rid:h send
a=rid:m send
a=rid:l send
a=rtcp-fb:120 nack
a=rtcp-fb:120 nack pli
a=rtcp-fb:120 ccm fir
a=rtcp-fb:120 goog-remb
a=rtcp-fb:120 transport-cc
a=rtcp-fb:121 nack
a=rtcp-fb:121 nack pli
a=rtcp-fb:121 ccm fir
a=rtcp-fb:121 goog-remb
a=rtcp-fb:121 transport-cc
a=rtcp-fb:126 nack
a=rtcp-fb:126 nack pli
a=rtcp-fb:126 ccm fir
a=rtcp-fb:126 goog-remb
a=rtcp-fb:126 transport-cc
a=rtcp-fb:97 nack
a=rtcp-fb:97 nack pli
a=rtcp-fb:97 ccm fir
a=rtcp-fb:97 goog-remb
a=rtcp-fb:97 transport-cc
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:120 VP8/90000
a=rtpmap:124 rtx/90000
a=rtpmap:121 VP9/90000
a=rtpmap:125 rtx/90000
a=rtpmap:126 H264/90000
a=rtpmap:127 rtx/90000
a=rtpmap:97 H264/90000
a=rtpmap:98 rtx/90000
a=setup:actpass
a=simulcast:send h;m;l
a=ssrc:145801862 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc:768527164 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc:1188813736 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc:
2099783702 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc:2000899815 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc:
2762046239 cname:{1e7ea314-9ccb-46e1-8fb4-b44da9b0b3f9}
a=ssrc-group:FID 145801862 768527164