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<!DOCTYPE HTML>
<html class="reftest-wait">
<meta charset="utf-8">
<title>Test that if a WebM video has an alpha channel, it is displayed correctly when captured.</title>
<script>
async function runTest() {
const v = document.createElement("video");
document.body.appendChild(v);
const vout = document.createElement("video");
document.body.appendChild(vout);
v.preload = "auto";
v.src = "webm-alpha.webm";
await new Promise(r => v.onloadeddata = r);
vout.srcObject = v.mozCaptureStream();
v.play();
await new Promise(r => vout.onloadeddata = r);
document.documentElement.removeAttribute("class");
}
</script>
<body style="background:grey;" onload="runTest()">
</body>
</html>
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