Re: RED and FEC and RTX (and related questions!) from Philipp Hancke on 2016-03-11 (public-ortc@w3.org from March 2016)

From: Philipp Hancke <fippo@goodadvice.pages.de>
Date: Fri, 11 Mar 2016 19:51:59 +0100
To: public-ortc@w3.org
Message-ID: <56E313CF.1000908@goodadvice.pages.de>

thanks Bernard. How about this SDP which I saw earlier today while using 
hangouts:

m=video 1 RTP/SAVPF 100 96
a=sendrecv
a=mid:video
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 
inline:1eAjrypb/P7k08KHGrvyMjrieScXdBLdp9L0Ic2A
a=rtpmap:100 VP8/90000
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack
a=rtcp-fb:100 goog-remb
a=rtpmap:96 rtx/90000
a=fmtp:96 apt=100
a=rtcp-fb:96 ccm fir
a=rtcp-fb:96 nack
a=rtcp-fb:96 goog-remb
a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=ssrc-group:SIM 2021970535 4198355922 1338462590
a=ssrc-group:FID 2021970535 1247125632
a=ssrc-group:FID 4198355922 3739353240
a=ssrc-group:FID 1338462590 871616995
a=ssrc:2021970535 cname:localCname
a=ssrc:2021970535 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ssrc:4198355922 cname:localCname
a=ssrc:4198355922 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ssrc:1338462590 cname:localCname
a=ssrc:1338462590 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ssrc:1247125632 cname:localCname
a=ssrc:1247125632 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ssrc:3739353240 cname:localCname
a=ssrc:3739353240 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ssrc:871616995 cname:localCname
a=ssrc:871616995 msid:b6a79d0b-6724-4898-b09e-6be5e154b1d6 
1fc51626-7ed8-49fc-821d-64cb2da54a82
a=ice-ufrag:i17XNoOSWNJ+BpfF
a=ice-pwd:1fyz+4egEtHK8+AjA3J0/Q4f

simulcast with rtx. Looks like an excellent test case :-)

Received on Friday, 11 March 2016 18:52:33 UTC