Hi,

I couldn't see that anyone had raised this anywhere and it seems unrelated to 
this topic on discuss-webrtc 
https://groups.google.com/forum/#!topic/discuss-webrtc/dLsbz6Xwxc0 - so I 
thought I'd share the error message I'm receiving. 

If you'd like me to raise this as a bug please let me know...but thought it 
might be better first as just an informational post.

So setting up a video call between the latest Chrome (28.0.1500.71 (Official 
Build 209842) ) and Firefox 22 & Nightly (25.0a1 (2013-07-25)) on Linux I get 
this SDP parsing error message in Firefox.

"Could not negotiate media lines; cause = ERR | SDP Parsing Error: Warning: 
Group attribute type unsupported (BUNDLE). | SDP Parsing Error: Warning: 
Unrecognized attribute (msid-semantic) | SDP Parsing Error: Warning: 
Unrecognized attribute (ice-options) | SDP Parsing Error: Warning: Unrecognized 
attribute (extmap) | SDP Parsing Error: Warning: Numeric token for mid 
attribute not found | SDP Parsing Error: Warning: Invalid named events 
specified for fmtp attribute. | SDP Parsing Error: Warning: Unrecognized 
attribute (ssrc) | SDP Parsing Error: Warning: Unrecognized attribute (ssrc) | 
SDP Parsing Error: Warning: Unrecognized attribute (ssrc) | SDP Parsing Error: 
Warning: Unrecognized attribute (ssrc) | SDP Parsing Error: Warning: 
Unrecognized attribute (ice-options) | SDP Parsing Error: Warning: Unrecognized 
attribute (extmap) | SDP Parsing Error: Warning: Numeric token for mid 
attribute not found | SDP Parsing Error: Warning: Unrecognized attribute (ssrc) 
| SDP Parsing Error
 : Warning: Unrecognized attribute (ssrc) | SDP Parsing Error: Warning: 
Unrecognized attribute (ssrc) | SDP Parsing Error: Warning: Unrecognized 
attribute (ssrc) "

However, in the exact same app I can setup a video call between two Firefox 
tabs or separate browsers so it's definitely working OK with Firefox SDP.

If you'd like a full copy of the Chrome SDP and related signaling please let me 
know...but I'm sure you've got a good collection of this already 8)

roBman
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