我从http://jakearchibald.com/scratch/alphavid/帆布视频CORS
$("#video").append('<video id="movie" style="display:none" autobuffer><source id="srcMp4" src="https://host-away-from-host.com/file.mp4" type=\'video/mp4; codecs="avc1.42E01E"\' /></video>'+
'<canvas width="711" height="800" id="buffer" style="display:none"></canvas>'+
'<canvas width="711" height="400" id="output"></canvas>');
var outputCanvas = document.getElementById('output'),
output = outputCanvas.getContext('2d'),
bufferCanvas = document.getElementById('buffer'),
buffer = bufferCanvas.getContext('2d'),
video = document.getElementById('movie'),
width = outputCanvas.width,
height = outputCanvas.height,
interval;
function processFrame() {
buffer.drawImage(video, 0, 0);
// this can be done without alphaData, except in Firefox which doesn't like it when image is bigger than the canvas
var image = buffer.getImageData(0, 0, width, height),
imageData = image.data,
alphaData = buffer.getImageData(0, height, width, height).data;
for (var i = 3, len = imageData.length; i < len; i = i + 4) {
imageData[i] = alphaData[i-1];
}
output.putImageData(image, 0, 0, 0, 0, width, height);
}
video.addEventListener('play', function() {
clearInterval(interval);
interval = setInterval(processFrame, 40)
}, false);
获得下面的代码,它需要的视频,并将其装载到透明度的画布。
但是,我为我的视频使用了CDN,而Chrome对这个跨源数据并不满意。
我已经在我的CDN中设置了正确的CORS头文件(但是很感谢核对清单),但我不知道如何对这些代码实施这些建议的更改; http://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html
对此事的任何意见,将不胜感激!
谢谢!
我推断'buffer.drawImage(视频,0,0);'是罪魁祸首,将交叉原点视频添加到缓冲区画布。我如何制作视频不是跨网站? – 2012-02-08 17:01:57