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problems with drawImage method in firefox 50.0 on Android 4.4.2 (Lenovo B8080-H)

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  • Τελευταία απάντηση από the-edmeister

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Good day!

We have small project for get and view screenshots from camera, and after upgrading to 50.0 we have some problems:

1) How it works: User open web-application and give permissions to use camera. Next he can use camera to get a screenshot. If he do it he get image on screen.

2) Code // get user media if(navigator.mozGetUserMedia)

   {
       moz=true;
       navigator.mozGetUserMedia({video: {optional: [{sourceId: idcam}]}, audio: false}, success, error);
   }

';

// camera stream to view function success(stream) {

   v=document.getElementById("v");
   if(moz)
   {
       v.mozSrcObject = stream;
       v.play();
       console.log("Success in moz")
   }

}

// function to capture image from camera to canvas and insert it to $scope.getScreenshot = function(){

               var video = document.getElementById("v");
               var canvas = document.getElementById("qr-canvas");
               var gc = canvas.getContext("2d");
               gc.drawImage(video, 0, 0, canvas.width, canvas.height);
               $scope.outputImg = canvas.toDataURL();
           };

<canvas id="qr-canvas" style="width:100vw;height:100vh;position: fixed;display:none;"></canvas>

3) Problem: All work good in firefox 49 at all devices, and in firefox 50 at all devices except Lenovo B8080-H on Android 4.4.2. At this device we get green square instead screenshot. I think that something wrong in drawImage method on this device.

Also in browser i get warning that "navigator.mozGetUserMedia is change to navigator.mediaDevices.getUserMedia", but if I try to use navigator.mediaDevices.getUserMedia I don't get notification to allow permissions to camera

Good day! We have small project for get and view screenshots from camera, and after upgrading to 50.0 we have some problems: 1) How it works: User open web-application and give permissions to use camera. Next he can use camera to get a screenshot. If he do it he get image on screen. 2) Code // get user media if(navigator.mozGetUserMedia) { moz=true; navigator.mozGetUserMedia({video: {optional: [{sourceId: idcam}]}, audio: false}, success, error); } <!-- html5 tag with our video stream --> <video id="v" autoplay style="width:100vw;height:100vh;position: fixed;left:0px;bottom:0px;background-color: black;z-index:10"></video>'; // camera stream to view function success(stream) { v=document.getElementById("v"); if(moz) { v.mozSrcObject = stream; v.play(); console.log("Success in moz") } } // function to capture image from camera to canvas and insert it to <img> $scope.getScreenshot = function(){ var video = document.getElementById("v"); var canvas = document.getElementById("qr-canvas"); var gc = canvas.getContext("2d"); gc.drawImage(video, 0, 0, canvas.width, canvas.height); $scope.outputImg = canvas.toDataURL(); }; <canvas id="qr-canvas" style="width:100vw;height:100vh;position: fixed;display:none;"></canvas> <img ng-src="{{ outputImg }}" style="width:100vw;height:100vh;position: fixed;z-index:10;display: block;left: 0px;top:0px"> 3) Problem: All work good in firefox 49 at all devices, and in firefox 50 at all devices except Lenovo B8080-H on Android 4.4.2. At this device we get green square instead screenshot. I think that something wrong in drawImage method on this device. Also in browser i get warning that "navigator.mozGetUserMedia is change to navigator.mediaDevices.getUserMedia", but if I try to use navigator.mediaDevices.getUserMedia I don't get notification to allow permissions to camera

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moving the the Firefox for Android support queue