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A function to grab the frame at a specific point within a video.
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function getVideoImage(path, secs, callback) { | |
var me = this, video = document.createElement('video'); | |
video.onloadedmetadata = function() { | |
if ('function' === typeof secs) { | |
secs = secs(this.duration); | |
} | |
this.currentTime = Math.min(Math.max(0, (secs < 0 ? this.duration : 0) + secs), this.duration); | |
}; | |
video.onseeked = function(e) { | |
var canvas = document.createElement('canvas'); | |
canvas.height = video.videoHeight; | |
canvas.width = video.videoWidth; | |
var ctx = canvas.getContext('2d'); | |
ctx.drawImage(video, 0, 0, canvas.width, canvas.height); | |
var img = new Image(); | |
img.src = canvas.toDataURL(); | |
callback.call(me, img, this.currentTime, e); | |
}; | |
video.onerror = function(e) { | |
callback.call(me, undefined, undefined, e); | |
}; | |
video.src = path; | |
} |
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