[Webkit-unassigned] [Bug 174810] New: videoWidth and videoHeight are 0 when using Mock Capture Devices and a muted video track
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Jul 24 20:33:56 PDT 2017
https://bugs.webkit.org/show_bug.cgi?id=174810
Bug ID: 174810
Summary: videoWidth and videoHeight are 0 when using Mock
Capture Devices and a muted video track
Product: WebKit
Version: Safari Technology Preview
Hardware: Macintosh
OS: macOS 10.12.4
Status: NEW
Severity: Normal
Priority: P2
Component: Media Elements
Assignee: webkit-unassigned at lists.webkit.org
Reporter: adam at tokbox.com
If you have a muted video track with real devices you still get the correct videoWidth and videoHeight on the video element. However if you are using the Mock Capture Devices then you get 0x0.
Here is some sample code to reproduce the problem: https://output.jsbin.com/kokeqob
navigator.mediaDevices.getUserMedia({
audio: true,
video: true
}).then(stream => {
stream.getVideoTracks()[0].enabled = false;
const vid = document.createElement('video');
vid.srcObject = stream;
document.body.appendChild(vid);
checkVideoDimensions(vid);
vid.play();
}).catch(err => {
console.error(err);
});
function checkVideoDimensions(vid) {
const showDimensions = () => {
videoWidth.innerHTML = vid.videoWidth;
videoHeight.innerHTML = vid.videoHeight;
};
vid.addEventListener('loadedmetadata', showDimensions);
vid.addEventListener('timeupdate', showDimensions);
setInterval(showDimensions, 2000);
}
If you visit that URL and allow access to your camera using real devices you will see that videoWidth and videoHeight are 640x480. However if you choose the Mock Capture Devices option then you get 0x0.
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