问题
I wrote a webrtc webapp (with video + audio + dataChannel) on:
https://github.com/wennycooper/wsProject
I wrote an Android webrtc app too on:
https://github.com/wennycooper/webrtcClient
The webapp-to-webapp call works fine. The androidapp-to-androidapp without data channel also works fine.
I tried to add data channel code into androidapp and make call from webapp to androidapp. When the callee received the Offer, it shown following error:
04-10 15:48:32.410: W/libjingle(10639): Warning(rtpdataengine.cc:149): Failed to SetSendCodecs because there is no known codec.
04-10 15:48:32.410: W/libjingle(10639): Warning(channel.cc:2375): Failed to set remote data description
04-10 15:48:32.420: E/libjingle(10639): Error(channel.cc:730): Failure in SetRemoteContent with action 0
04-10 15:48:32.420: E/libjingle(10639): Error(webrtcsession.cc:272): Failed to set remote offer sdp: Session error code: ERROR_CONTENT. Session error description: Failed to set data send codecs..
04-10 15:48:32.420: D/MainActivity(10639): Creating ANSWER...
04-10 15:48:32.420: E/libjingle(10639): Error(webrtcsessiondescriptionfactory.cc:245): CreateAnswer can't be called before SetRemoteDescription.
04-10 15:48:32.420: E/libjingle(10639): Error(webrtcsessiondescriptionfactory.cc:408): Create SDP failed: CreateAnswer can't be called before SetRemoteDescription.
The full adb log is over here:
https://s3-us-west-2.amazonaws.com/kkwebrtc/webrtcAndroid_callee.txt
I have no idea what's going on??
Anyone can provide a working example with data channel will be very appreciated.
回答1:
Finally, I got a working example.
What I did is comment out following line and use SCTPDataChannel.
//pcConstraints.optional.add(new KeyValuePair("RtpDataChannels", "false")); The working example is here:
https://github.com/wennycooper/webrtcClient
来源：https://stackoverflow.com/questions/29556425/failed-to-make-webrtc-call-with-datachannel-from-chrome-web-app-to-android-app