问题
Is it possible to detect the aspect ratio of an HTML5 video element?
I know the video will just shrink to fit in the <video> element's dimensions, but I want to detect the aspect ratio of the source video.
That way you could remove any black bars.
Sorry I don't see this answered anywhere else.
回答1:
Pasting from another StackOverflow answer: https://stackoverflow.com/a/4129189/1353189
<video id="foo" src="foo.mp4"></video>
var vid = document.getElementById("foo");
vid.videoHeight; // returns the intrinsic height of the video
vid.videoWidth; // returns the intrinsic width of the video
Source (HTML5 spec): http://www.w3.org/TR/html5/video.html#video
You can then calculate the aspect ratio by dividing the width by the height.
来源：https://stackoverflow.com/questions/14904623/detect-aspect-ratio-html5-video