webrtc,人脸拍照小功能

来源：互联网发布：解压for mac 编辑：程序博客网时间：2024/05/01 18:22

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1. function hasUserMedia(){//判断是否支持调用设备api，因为浏览器不同所以判断方式不同哦
2. return !!(navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia);
3. }
4. if(hasUserMedia()){
5. //alert(navigator.mozGetUserMedia)
6. navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
7. var video=document.querySelector("video");
8. var canvas=document.querySelector("canvas");
9. var streaming = false;
10. navigator.getUserMedia({
11. video:true,//开启视频
12. audio:false//先关闭音频，因为会有回响，以后两台电脑通信不会有响声
13. },function(stream){//将视频流交给video
14. video.src=window.URL.createObjectURL(stream);
15. streaming = true;
16. },function(err){
17. console.log("capturing",err)
18. });
19. document.querySelector("#capture").addEventListener("click",function(event){
20. if(streaming){
21. //alert(video.clientHeight)
22. //canvas.width = video.clientWidth;
23. //canvas.height= video.clientHeight;
24. canvas.width = 800;
25. canvas.height = 800;
26. var context = canvas.getContext('2d');
27. context.drawImage(video,20,20)
28. }
29. })
30. }else{
31. alert("浏览器暂不支持")
32. }

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