On Thursday, 6 July 2017 04:43:01 UTC+5:30, Nils Ohlmeier wrote: > > On Jul 5, 2017, at 05:28, [email protected] wrote: > > > > We are testing FF/Simulcast with our SFU, expecting FF to send RTP of all > > three streams as advertised in SDP. > > > > simulcast parameters > > { > > encodings: [{ > > rid: "720", > > }, { > > rid: "360", > > scaleResolutionDownBy: 2, > > }, { > > rid: "180", > > scaleResolutionDownBy: 4, > > }, ] > > }; > > Not sure if it makes a difference, but have you tried to add the maxBitrate > parameter to the encodings? > Like here: > http://searchfox.org/mozilla-central/source/dom/media/tests/mochitest/test_peerConnection_simulcastOffer.html#62 > > <http://searchfox.org/mozilla-central/source/dom/media/tests/mochitest/test_peerConnection_simulcastOffer.html#62> > > > > > Offer: > > > > a=simulcast: send rid=720;360;180 > > a=extmap:3/sendonly urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id > > a=rid:720 send > > a=rid:360 send > > a=rid:180 send > > > > Answer: > > > > a=simulcast: recv rid=720;360;180 > > a=extmap:3/recvonly urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id > > a=rid:720 recv > > a=rid:360 recv > > a=rid:180 recv > > > > But when we check the outgoing rtp packet header extension, we can see that > > it is sending packets for resolution 180p (because the extension is > > corresponding to rid 180) > > > > As per the simulcast, we expect it to send all three streams(720, 360 & > > 180). Any idea what are we doing wrong here? > > Have you looked at all RTP packets? > I’m asking because I noticed that in Firefox 56 we only include the RID in > the very first packet for each frame. So you need to carefully search for the > beginning of the next frame to find the 2nd and 3rd RID. > > Best regards > Nils Ohlmeier
We are able to see all the simulcast streams after using the maxBitrate parameter as you suggested. But I think it's a bug in Firefox that it doesn't start the simulcast stream without the maxBitrate being set to the encodings. _______________________________________________ dev-media mailing list [email protected] https://lists.mozilla.org/listinfo/dev-media
