Added support for SDP workarounds which are required when renegotiation is on.

static/js/mediastream/peercall.js

@@ -171,6 +171,8 @@ define(['jquery', 'underscore', 'mediastream/utils', 'mediastream/peerconnection
 		sessionDescription.sdp = utils.maybePreferVideoReceiveCodec(sessionDescription.sdp, params);
 		sessionDescription.sdp = utils.maybeSetAudioReceiveBitRate(sessionDescription.sdp, params);
 		sessionDescription.sdp = utils.maybeSetVideoReceiveBitRate(sessionDescription.sdp, params);
+		// Apply workarounds.
+		sessionDescription.sdp = utils.fixLocal(sessionDescription.sdp, params);
 
 	};
 
@@ -183,6 +185,8 @@ define(['jquery', 'underscore', 'mediastream/utils', 'mediastream/peerconnection
 		sessionDescription.sdp = utils.maybeSetAudioSendBitRate(sessionDescription.sdp, params);
 		sessionDescription.sdp = utils.maybeSetVideoSendBitRate(sessionDescription.sdp, params);
 		sessionDescription.sdp = utils.maybeSetVideoSendInitialBitRate(sessionDescription.sdp, params);
+		// Apply workarounds.
+		sessionDescription.sdp = utils.fixRemote(sessionDescription.sdp, params);
 
 	};
 

static/js/mediastream/utils.js

@@ -425,7 +425,21 @@ define([], function() {
     maybePreferAudioSendCodec: maybePreferAudioSendCodec,
     maybePreferAudioReceiveCodec: maybePreferAudioReceiveCodec,
     maybePreferVideoSendCodec: maybePreferVideoSendCodec,
-    maybePreferVideoReceiveCodec: maybePreferVideoReceiveCodec
+    maybePreferVideoReceiveCodec: maybePreferVideoReceiveCodec,
+    fixLocal: function(sdp) {
+      if (window.webrtcDetectedBrowser === "chrome") {
+        // Remove all rtx support from locally generated sdp. Chrome
+        // does create this sometimes wrong.
+        // TODO(longsleep): Limit to Chrome version, once it is fixed upstream.
+        // See https://code.google.com/p/webrtc/issues/detail?id=3962
+        sdp = sdp.replace(/a=rtpmap:\d+ rtx\/\d+\r\n/i, "");
+        sdp = sdp.replace(/a=fmtp:\d+ apt=\d+\r\n/i, "");
+      }
+      return sdp;
+    },
+    fixRemote: function(sdp) {
+      return sdp;
+    }
   }
 
 });