WebRTC onicecandidate:正在用sdpMid=audio来获取ICE候选项，但不用于视频。

The browser used is Chrome... I have the caller and receiver code to generate SDP and ICE candidates. I get the caller code to generate proper SDP and ICE candidates with sdpMid=video but for the receiver, I am getting ICE candidates generated only for sdpMid=audio. The browser used is Chrome... I have the caller