webRTC:如何在Stream中检测音频/视频的存在? [英] webRTC: How to detect audio/video presence in Stream?

问题描述

我想知道addstream回调中接收到的流中轨道的存在.视讯通话运作良好，但我想进行.仅音频呼叫，因此我只是在getUserMedia约束中传递了 audio:true，video:false ，现在，当我收到流时，我无法弄清流中的存在.

I would like to know the tracks presence in received stream onaddstream callback. Video calling is working well but I would like to make. audio only call, so I just passed audio:true,video:false in getUserMedia constraints, now when I receive stream I cant figure out tracks presence in stream.

如何知道跟踪流中的存在?

How to know tracks presence in stream?

推荐答案

要了解音频和视频的存在，请使用 getAudioTracks 和 getVideoTracks .

To Know presence of Audio and Video use getAudioTracks and getVideoTracks.

function checkStream(stream){

   var hasMedia={hasVideo:false,hasAudio:false};

   if(stream.getAudioTracks().length)// checking audio presence
      hasMedia.hasAudio=true;

   if(stream.getVideoTracks().length)// checking video presence
      hasMedia.hasVideo=true;

    return hasMedia; 
}

要停止在视频流更改提议中传递视频并回答constrinats.

To stop passing Video in stream change offer and answer constrinats.

constraints = {
            optional: [],
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: false
            }
        };

这篇关于webRTC:如何在Stream中检测音频/视频的存在?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！