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December 21, 2017 14:17
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Speed up all media on page
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function getAllMedia() { | |
var getDocuments = function () { | |
var f = function (document) { | |
var iframes = Array.from(document.getElementsByTagName('iframe')); | |
var result = [ document ]; | |
iframes.forEach(function (iframe) { | |
var iframeDocument; | |
try { | |
iframeDocument = iframe.contentDocument; | |
} catch (error) { | |
return; | |
} | |
f(iframeDocument).forEach(function(d) { result.push(d); }) | |
}); | |
return result; | |
}; | |
return f(window.document); | |
} | |
var media = []; | |
getDocuments().forEach(function (d) { | |
Array.from(d.getElementsByTagName('audio')).forEach(function (a) { media.push(a); }); | |
Array.from(d.getElementsByTagName('video')).forEach(function (v) { media.push(v); }); | |
}); | |
return media; | |
} | |
function speedAllUp(rate) { | |
if (rate === undefined) { | |
rate = 2.25; | |
} | |
if (window._speedAllUpInterval !== undefined) { | |
clearInterval(window._speedAllUpInterval); | |
} | |
window._speedAllUpInterval = setInterval(function() { | |
getAllMedia().forEach(function (m) { if (!m.paused && m.readyState >= 2) { m.playbackRate = rate; } }); | |
}, 100) | |
} | |
function normalPlaybackRate() { | |
if (window._speedAllUpInterval !== undefined) { | |
clearInterval(window._speedAllUpInterval); | |
window._speedAllUpInterval = undefined; | |
} | |
getAllMedia().forEach(function (m) { m.playbackRate = 1; }); | |
} |
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