Samsung S10 doesn't work with torch about quagga2

[ericblade]

Firstly, does navigator.mediaDevices.getSupportedCapabilities() return "torch: true"? if no, then browser doesn't support it on that device. If yes, then... it seems you might need to write some code more complex than a one liner to figure it out. Ultimately, you need to get access to a MediaStreamTrack, which you could do by building a dev version of Quagga and once you have that, you need to look at the results of MediaStreamTrack.getCapabilities(), and see if that returns "torch: true". If that is also a yes, then it's broken, report it to Samsung. If that is a no, then the device's camera does not support turning on the flash from the browser, which seems broken, report it to Samsung.

Alternatively, you might also check and see if there are multiple cameras reported -- Perhaps the torch is only supported with certain specific camera device ids.

To get a list of all camera devices, you can use Quagga.CameraAccess.enumerateVideoDevices(), and the results will be an array of all of the camera devices detected on the hardware, along with their identifiers. You can pass the deviceId to Quagga.init() to use a different camera (but be sure to not pass a "facing" parameter if you pass a deviceId)

As the interface to all camera devices is no different between the S9 and the S10 and any other device, that seems to highly indicate that the problem is either with the Samsung supplied software, or an intentional "you can't use torch from browser" or "you can't use torch with this specific camera id", neither of which make sense, but there's a lot of things that don't make sense to me out there. Therefore, I'm going to mark this as closed, unless or until you can provide some evidence of a deficiency in Quagga. If you find something, feel free to re-open.

I'd be happy to help where I can, but I think ultimately, you'll need to put together a development environment, and actually write some camera access code, to attempt to debug where the problem lay exactly.