use H.264 on youtube. based on https://github.com/erkserkserks/h264ify.
目前为
// ==UserScript==
// @name Youtube H.264
// @namespace http://www.youtube.com
// @version 1.0.0
// @description use H.264 on youtube. based on https://github.com/erkserkserks/h264ify.
// @match http://youtube.com/*
// @match https://youtube.com/*
// @match http://www.youtube.com/*
// @match https://www.youtube.com/*
// @grant none
// @run-at document-start
// ==/UserScript==
// code from https://github.com/erkserkserks/h264ify/blob/master/src/inject/inject.js
/**
* The MIT License (MIT)
*
* Copyright (c) 2015 erkserkserks
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
(function() {
// Override video element canPlayType() function
var videoElem = document.createElement('video');
var origCanPlayType = videoElem.canPlayType.bind(videoElem);
videoElem.__proto__.canPlayType = function(type) {
if (type === undefined) return '';
// If queried about webM/vp8/vp8 support, say we don't support them
if (type.indexOf('webm') != -1 ||
type.indexOf('vp8') != -1 ||
type.indexOf('vp9') != -1) {
return '';
}
// Otherwise, ask the browser
return origCanPlayType(type);
}
// Override media source extension isTypeSupported() function
var mse = window.MediaSource;
var origIsTypeSupported = mse.isTypeSupported.bind(mse);
mse.isTypeSupported = function(type) {
if (type === undefined) return '';
// If queried about webM/vp8/vp8 support, say we don't support them
if (type.indexOf('webm') != -1 ||
type.indexOf('vp8') != -1 ||
type.indexOf('vp9') != -1) {
return '';
}
// Otherwise, ask the browser
return origIsTypeSupported(type);
}
})();