title: How to Resolve SDP error in WebRTC Video on chrome
body: <p>I have a video chat App working since I upgrade to latest chrome 31.0.1650.57m.</p>
  
  <p>Peer A sends the offer sdp and peer B send back the answer sdp and sdp error occurs.
  sdp error says</p>
  
  <p>"SetRemoteDescription failed: Failed to update session state: ERROR_CONTENT"</p>
  
  <p>My Offer SPD looks like this</p>
  
  <pre><code>v=0 
  o=- 1768855259715688796 2 IN IP4 127.0.0.1 
  s=- 
  t=0 0 
  a=group:BUNDLE audio video 
  a=msid-semantic: WMS B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZ 
  m=audio 1 RTP/SAVPF 111 103 104 0 8 106 105 13 126 
  c=IN IP4 0.0.0.0 
  a=rtcp:1 IN IP4 0.0.0.0 
  a=ice-ufrag:kMe68YGD6wA/W3gh 
  a=ice-pwd:ypGmGa5tBZxopxiZB4dtAYxh 
  a=ice-options:google-ice 
  a=fingerprint:sha-256         A5:20:56:7C:4E:63:4D:3D:11:77:22:FD:0C:BB:B0:5C:6C:FF:75:78:C1:83:39:31:0C:8A:9A:EB:15:91:3   0:7A
  a=setup:actpass 
  a=mid:audio 
  a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level 
  a=sendrecv 
  a=rtcp-mux 
  a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:OhFYzSAk6czZwm8hEQNDMfKWyRFaLee2wbKS2jSL 
  a=rtpmap:111 opus/48000/2 
  a=fmtp:111 minptime=10 
  a=rtpmap:103 ISAC/16000 
  a=rtpmap:104 ISAC/32000 
  a=rtpmap:0 PCMU/8000 
  a=rtpmap:8 PCMA/8000 
  a=rtpmap:106 CN/32000 
  a=rtpmap:105 CN/16000 
  a=rtpmap:13 CN/8000 
  a=rtpmap:126 telephone-event/8000 
  a=maxptime:60 
  a=ssrc:1187225734 cname:IpuUg1fZr7ZEMRux 
  a=ssrc:1187225734 msid:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZ B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZa0 
  a=ssrc:1187225734 mslabel:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZ 
  a=ssrc:1187225734 label:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZa0 
  m=video 1 RTP/SAVPF 100 116 117 
  c=IN IP4 0.0.0.0 
  a=rtcp:1 IN IP4 0.0.0.0 
  a=ice-ufrag:kMe68YGD6wA/W3gh 
  a=ice-pwd:ypGmGa5tBZxopxiZB4dtAYxh 
  a=ice-options:google-ice 
  a=fingerprint:sha-256  A5:20:56:7C:4E:63:4D:3D:11:77:22:FD:0C:BB:B0:5C:6C:FF:75:78:C1:83:39:31:0C:8A:9A:EB:15:91:30:7A 
  a=setup:actpass 
  a=mid:video 
  a=extmap:2 urn:ietf:params:rtp-hdrext:toffset 
  a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time 
  a=sendrecv 
  a=rtcp-mux 
  a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:OhFYzSAk6czZwm8hEQNDMfKWyRFaLee2wbKS2jSL 
  a=rtpmap:100 VP8/90000 
  a=rtcp-fb:100 ccm fir 
  a=rtcp-fb:100 nack 
  a=rtcp-fb:100 goog-remb 
  a=rtpmap:116 red/90000 
  a=rtpmap:117 ulpfec/90000 
  a=ssrc:1122033066 cname:IpuUg1fZr7ZEMRux 
  a=ssrc:1122033066 msid:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZ B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZv0 
  a=ssrc:1122033066 mslabel:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZ 
  a=ssrc:1122033066 label:B857Mhr7tR0B5AHMokH939BgLLQLr1i06lPZv0
  </code></pre>
  
  <p>My Answer SDP looks like this</p>
  
  <pre><code>v=0
  o=- 2870270120403727946 2 IN IP4 127.0.0.1
  s=-
  t=0 0
  a=group:BUNDLE audio video
  a=msid-semantic: WMS
  m=audio 1 RTP/SAVPF 111 103 104 0 8 106 105 13 126
  a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:XXWIJKQPDUZJLWIZFWUYWGEVBQEYHJAWMOKJBSHB
  c=IN IP4 0.0.0.0
  a=rtcp:1 IN IP4 0.0.0.0
  a=ice-ufrag:sQBHE9PspEfJXD7B
  a=ice-pwd:KyAMCGWrNMkIpWM5PXj9gnmj
  a=fingerprint:sha-256 FB:FB:EB:A6:F7:59:5A:CA:60:EC:F2:90:D9:4D:F1:E1:D4:5B:A2:F5:04:1E:3B:13:AE:BD:0D:08:A6:1B:C 6:03
  a=setup:active
  a=mid:audio
  a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
  a=recvonly
  a=rtcp-mux
  a=rtpmap:111 opus/48000/2
  a=fmtp:111 minptime=10
  a=rtpmap:103 ISAC/16000
  a=rtpmap:104 ISAC/32000
  a=rtpmap:0 PCMU/8000
  a=rtpmap:8 PCMA/8000
  a=rtpmap:106 CN/32000
  a=rtpmap:105 CN/16000
  a=rtpmap:13 CN/8000
  a=rtpmap:126 telephone-event/8000
  a=maxptime:60
  m=video 1 RTP/SAVPF 100 116 117
  a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:XXWIJKQPDUZJLWIZFWUYWGEVBQEYHJAWMOKJBSHB
  c=IN IP4 0.0.0.0
  a=rtcp:1 IN IP4 0.0.0.0
  a=ice-ufrag:sQBHE9PspEfJXD7B
  a=ice-pwd:KyAMCGWrNMkIpWM5PXj9gnmj
  a=fingerprint:sha-256 FB:FB:EB:A6:F7:59:5A:CA:60:EC:F2:90:D9:4D:F1:E1:D4:5B:A2:F5:04:1E:3B:13:AE:BD:0D:08:A6:1B:C6:03
  a=setup:active
  a=mid:video
  a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
  a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
  a=recvonly
  a=rtcp-mux
  a=rtpmap:100 VP8/90000
  a=rtcp-fb:100 ccm fir
  a=rtcp-fb:100 nack
  a=rtcp-fb:100 goog-remb
  a=rtpmap:116 red/90000
  a=rtpmap:117 ulpfec/90000
  </code></pre>