您需要先安装一个扩展,例如 篡改猴、Greasemonkey 或 暴力猴,之后才能安装此脚本。
您需要先安装一个扩展,例如 篡改猴 或 暴力猴,之后才能安装此脚本。
您需要先安装一个扩展,例如 篡改猴 或 暴力猴,之后才能安装此脚本。
您需要先安装一个扩展,例如 篡改猴 或 Userscripts ,之后才能安装此脚本。
您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey,才能安装此脚本。
您需要先安装用户脚本管理器扩展后才能安装此脚本。
add keyboard shortcuts that will increase/decrease the playback rate for video elements.
- // ==UserScript==
- // @name video-element-rate-controller
- // @namespace https://github.com/mirnhoj/video-element-playbackrate-setter
- // @version 0.1
- // @description add keyboard shortcuts that will increase/decrease the playback rate for video elements.
- // @include http*://*.youtube.com/*
- // @include http*://*.gfycat.com/*
- // @include http*://*.vimeo.com/*
- // @include https://www.facebook.com/video.php*
- // @include https://www.facebook.com/*/videos/*
- // @include https://www.kickstarter.com/*
- // @grant none
- // ==/UserScript==
- //
- // if you want to extend the functionality of this script to other sites
- // besides youtube, add additional @include keys to the metadata block.
- //
- // if you want to change the default playback rate from 1x, change the line
- // "var currentPlaybackRate = 1;" to equal something other than 1, like 1.3 to
- // have all videos start playing at an increased speed, or 0.7 to have all
- // videos start playing at a decreased speed.
- //
- // if you want change the granularity of the playback rate adjustment, change
- // the line "var speedStep = 0.1;" to equal something other than 0.1, like 0.01
- // for more granular adjustments, or 0.25 for less granular adjustments.
- var currentPlaybackRate = 1; // default playback rate.
- var speedStep = 0.1;
- var infobox = document.createElement("h1");
- infobox.setAttribute("id", "playbackrate-indicator");
- infobox.style.position = "absolute";
- infobox.style.top = "10%";
- infobox.style.right = "10%";
- infobox.style.color = "rgba(255, 0, 0, 1)";
- infobox.style.zIndex = "99999"; // ensures that it shows above other elements.
- infobox.style.visibility = "hidden";
- infobox.style.marginTop = "3%";
- var timeoutID;
- function setPlaybackRate(rate, showInfobox) {
- // fix floating point errors like 1.1 + 0.1 = 1.2000000000000002.
- rate = Math.round(rate * (1 / speedStep)) / (1 / speedStep);
- // grab the video elements and set their playback rate.
- var videoElement = document.getElementsByTagName("video")[0];
- videoElement.playbackRate = rate;
- infobox.innerHTML = rate + "x";
- // add infobox to dom if it doesn't already exist.
- if (videoElement && !document.getElementById("playbackrate-indicator")) {
- videoElement.parentElement.appendChild(infobox);
- }
- // show infobox and update rate indicator.
- if (showInfobox) {
- infobox.style.visibility = "visible";
- // clear out any previous timers and have the infobox hide after 3 seconds.
- window.clearTimeout(timeoutID);
- timeoutID = window.setTimeout(function() {
- infobox.style.visibility = "hidden";
- }, 3000);
- }
- }
- document.addEventListener('DOMContentLoaded', function() {
- setPlaybackRate(currentPlaybackRate, true);
- });
- // youtube videos don't always load on the DOMContentLoaded event :-/
- document.addEventListener('DOMNodeInserted', function() {
- setPlaybackRate(currentPlaybackRate, false);
- });
- // mimic vlc keyboard shortcuts
- window.addEventListener('keydown', function(event) {
- var keycode = event.charCode || event.keyCode;
- // decrease playback rate if '[' is pressed
- if (keycode === 91 || keycode === 123 || keycode === 219) {
- currentPlaybackRate -= speedStep;
- }
- // increase playback rate if ']' is pressed
- if (keycode === 93 || keycode === 125 || keycode === 221) {
- currentPlaybackRate += speedStep;
- }
- // need to set playback rate for all keydown events since it seems like the
- // standard youtube keyboard shortcuts--like the arrow keys to skip forward
- // and backwards--are set to reset the playback rate to 1.
- setPlaybackRate(currentPlaybackRate, true);
- });
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