Camera is in use ??

[tkosen]

Hi all,

      How to detect camera is in use or not ??  Adobe says, if Camera.getCamera(); returns null, it means camera not installed, or in use ,

i use below, then when i start swf, first one is ok, but then i start new instance of app, it throws and error " .... flash 10 r2has stopped"

how can i solve that problem...

cam = Camera.getCamera();
  
   if (!cam) {
                myTextField.text = "No camera is installed.";
               
            } else {
                myTextField.text = "Connecting";
                connectCamera();
            }

    private function connectCamera():void {
                var vid:Video = new Video(150, 150);
                vid.x = 10;
                vid.y = 10;
                vid.attachCamera(cam);
                addChild(vid);  

                 }

thanks..

[vijay_das]

What adobe says is correct. Camera.getCamera() returns the available camera on the system or null if camera is not installed or not free.

To kill a netstream simply do following,

netStream.close();

netStream = null;

that should work.

[tkosen]

I use code below,

get an error like that

1. instance working good,

2.instance give an erro when i clicked allow for camera ???

package {
    import flash.display.Sprite;
    import flash.media.Camera;
    import flash.media.Video;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    import flash.events.StatusEvent;
    import flash.events.MouseEvent;
    import flash.system.SecurityPanel;
    import flash.system.Security;

    public class Camera_getCameraExample extends Sprite {
        private var myTextField:TextField;
        private var cam:Camera;
        private var t:Timer = new Timer(1000);
       
        public function Camera_getCameraExample() {
            myTextField = new TextField();
            myTextField.x = 10;
            myTextField.y = 10;
            myTextField.background = true;
            myTextField.selectable = false;
            myTextField.autoSize = TextFieldAutoSize.LEFT;   
       
            cam = Camera.getCamera();
           
            if (!cam) {
                myTextField.text = "No camera is installed.";
               
            } else if (cam.muted) {
                myTextField.text = "To enable the use of the camera,\n"
                                 + "please click on this text field.\n"
                                 + "When the Flash Player Settings dialog appears,\n"
                                 + "make sure to select the Allow radio button\n"
                                 + "to grant access to your camera.";

                myTextField.addEventListener(MouseEvent.CLICK, clickHandler);

            }else {
                myTextField.text = "Connecting";
                connectCamera();
            }
  
            addChild(myTextField);

            t.addEventListener(TimerEvent.TIMER, timerHandler);
        }

        private function clickHandler(e:MouseEvent):void {
            Security.showSettings(SecurityPanel.PRIVACY);

            cam.addEventListener(StatusEvent.STATUS, statusHandler);

            myTextField.removeEventListener(MouseEvent.CLICK, clickHandler);
        }

        private function statusHandler(event:StatusEvent):void {

            if (event.code == "Camera.Unmuted") {
                connectCamera();
                cam.removeEventListener(StatusEvent.STATUS, statusHandler);
            }
        }

        private function connectCamera():void {
                var vid:Video = new Video(cam.width, cam.height);
                vid.x = 10;
                vid.y = 10;
                vid.attachCamera(cam);
                addChild(vid);  

                t.start();
        }

        private function timerHandler(event:TimerEvent):void {
            myTextField.y = cam.height + 20;
            myTextField.text = "";
            myTextField.appendText("bandwidth: " + cam.bandwidth + "\n");
            myTextField.appendText("currentFPS: " + Math.round(cam.currentFPS) + "\n");
            myTextField.appendText("fps: " + cam.fps + "\n");
            myTextField.appendText("keyFrameInterval: " + cam.keyFrameInterval + "\n");
        }
    }
}

[Guest]

What combination of platform and camera device are you experiencing a flashplayer crash with? I've never encountered this behavior.

[tkosen]

hi JayCharles , flash cs4, windows 7, ie8 i use. Thanks ...

[yun22]

I've found that I need to manually release the camera. A function that calls:

vid.attachCamera(null);

Hopefully that is the piece that works for you too.

[tkosen]

hi yun,  actually i need to detect camera is in use or not ?? because , while a application using the cam, another app shouldnt allow user to use cam. When the app does, crashing. So i need a sample shows, check camera if in use or not before start..

Thanks...

[yun22]

I see, my mistake. I understand what you mean now. Have you tried to instantiate the Camera object in a Try/Catch block to maybe capture the error without crashing your flash player?

[tkosen]

Hi yun, i have already tried to use try/catch but, app is crashing down , when started Thanks for your help .