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Today I accidentally found that the camera shows the image of my screen while I can see nothing in Scanners and Cameras:

Scanners and Cameras

The webcam used to return no camera, but this time it shows my screen. How is that possible?

capture

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Software can access the screen content by other means than by using an optical device (when making a "screenshot" this becomes obvious). This technology exists some decades now, and as you correctly say, might be used for spying.

But, there is no camera involved.

Added - quoting Wikipedia:

The first screenshots were created with the first interactive computers around 1960

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  • I know software can access screen content, but I don't know how this happened. Can you give me some instructions about how to turn this off? – skygate Aug 4 '17 at 9:27
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    This "Neave Interactive Webcam Toy" is using Adobe Flash Player (a browser plugin which is installed on your machine) to access your screen content. I'd recommend to disable/deinstall Flash, as it poses severe security risks. If you deem Flash to be trustworthy nevertheless, you might try to check settings in the Flash Players "Camera and microphone settings". – jvb Aug 4 '17 at 11:01
  • No it's HTML5, Chrome has disabled Flash long ago. Here's the link: webcamtoy.com – skygate Aug 4 '17 at 13:09
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    Speaking of "Camera settings", I found the name of the camera device in Chrome. After searching it on Google it turned out that there's something to do with ffmpeg. – skygate Aug 4 '17 at 13:13

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