webrtc simulcasting

[Balaji]

Hi guys,

            I am trying to sending multiple stream using simulcast using a=rid concept  

My offer sdp look like this,

a=rid:1 send pt=96;max-width=1280;max-height=720;max-fps=24
a=rid:2 send pt=96;max-width=1280;max-height=720;max-fps=12
a=rid:3 send pt=96;max-width=640;max-height=360;max-fps=6
a=simulcast:send 1;2;3

chrome://webrtc-internals
I can able to see three stream's created using chrome internal 

currently two stream are active and another one is in-active it's not sending any packets.

RTCOutboundRTPVideoStream_1577815821 (outbound-rtp)

RTCOutboundRTPVideoStream_1577815821 (outbound-rtp)   
RTCOutboundRTPVideoStream_437688686 (outbound-rtp)

Can anyone Please help me to fix this issue.

[Brian Baldino]

Just wanted to chime in that I see the same behavior in a test I'm running.  

Offer:

a=rid:highc send
a=rid:medc send
a=rid:lowc send
a=simulcast:send highc;medc;lowc

Answer:

a=rid:highc recv
a=rid:medc recv
a=rid:lowc recv
a=simulcast:recv highc;medc;lowc

I get media on the 360p and 720p streams, but nothing on the 180p.  I've got a test file that seems to reproduce this every time in chrome 89.0.4389.128.

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