iOS 16 breaks camera view

[justanthonylee]

Looks like now that I have iOS 16 installed on stuff it wont scan, added a debug button that dumps a image on page of the canvas from Quagga.canvas.dom.image; and the content is just a black box, preview still works so looks like the JS can't capture the image stream.

I am playing around with custom capture of the video element and see what I can find.

[github-actions]

Thank you for filing an issue! Please be patient. :-)

[justanthonylee]

I am writing to a image element by calling this to see the camera input, looks fine on non iOS 16 devices so looks like a video render bug it might be due to new changes or might just be a iOS bug so can keep an eye on this going forward and report if I notice it get fixed in any future Developer Beta.

var video = document.getElementsByTagName("VIDEO")[0];
var datauri=getScreenshot(video, 1);

function getScreenshot(videoEl, scale) {
      scale = scale || 1;
  
      const canvas = document.createElement("canvas");
      canvas.width = videoEl.clientWidth * scale;
      canvas.height = videoEl.clientHeight * scale;
      canvas.getContext('2d').drawImage(videoEl, 0, 0, canvas.width, canvas.height);
  
      return canvas.toDataURL();
  }

[justanthonylee]

This is not a problem in the stable version of iOS and the new beta builds from what I can see.

[ericblade]

My apologies for not seeing this one before. Time since June has been really busy. I'm glad that Apple seems to have fixed the issue though :D :D Thanks for reporting back.

Much appreciated.