HTML5 Video Dimensions

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It should be noted that the currently accepted solution above by Sime Vidas doesn’t actually work in modern browsers since the videoWidth and videoHeight properties aren’t set until after the “loadedmetadata” event has fired.

If you happen to query for those properties far enough after the VIDEO element is rendered it may sometimes work, but in most cases this will return values of 0 for both properties.

To guarantee that you’re getting the correct property values you need to do something along the lines of:

var v = document.getElementById("myVideo");
v.addEventListener( "loadedmetadata", function (e) {
    var width = this.videoWidth,
        height = this.videoHeight;
}, false );

NOTE: I didn’t bother accounting for pre-9 versions of Internet Explorer which use attachEvent instead of addEventListener since pre-9 versions of that browser don’t support HTML5 video, anyway.

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