Select a youtube resolution and resize the player.
目前为
// ==UserScript==
// @name Youtube HD
// @author adisib
// @namespace namespace_adisib
// @description Select a youtube resolution and resize the player.
// @version 2017.03.23
// @include http://youtube.com/*
// @include http://www.youtube.com/*
// @include https://youtube.com/*
// @include https://www.youtube.com/*
// @noframes
// @grant none
// ==/UserScript==
// Only the html5 player is supported.
// The video will only resize when in theater mode.
// By default only runs youtube website, not players embeded on other websites.
// YouTube players embeded on other websites should work if enabled, but this feature is not supported.
// To enable for embedded players outside of YouTube website, do the following steps:
// add " @include * " to the script metadata
// remove " @noframes " from the script metadata
// 2017.03.23
// - Fixed resolution not being set when changing videos while in fullscreen
// - Probably a video loading speed improvement when buffer is flushed
// - As a side effect, should now work for embedded youtube players (but will always be disabled by default)
// - various minor improvements
(function() {
"use strict";
// --- SETTINGS -------
// Target Resolution to always set to. If not available, the next best resolution will be used.
const changeResolution = true;
const targetRes = "hd1080";
// Choices for targetRes are currently:
// "highres" >= ( 8K / 4320p / QUHD )
// "hd2880" = ( 5K / 2880p / UHD+ )
// "hd2160" = ( 4K / 2160p / UHD )
// "hd1440" = ( 1440p / QHD )
// "hd1080" = ( 1080p / FHD )
// "hd720" = ( 720p / HD )
// "large" = ( 480p )
// "medium" = ( 360p )
// "small" = ( 240p )
// "tiny" = ( 144p )
// If changePlayerSize is true, then the video's size will be changed on the page
// instead of using youtube's default (if theater mode is enabled).
// If useCustomSize is false, then the player will be resized to try to match the target resolution.
// If true, then it will use the customHeight and customWidth variables.
const changePlayerSize = false;
const useCustomSize = false;
const customHeight = 600, customWidth = 1280;
// If flushBuffer is false, then the very beginning of the video may not be the desired resolution
// If true, then the entire video will be guaranteed to be target resolution, but there may be
// a small additional delay before the video starts
const flushBuffer = true;
// --------------------
// --- GLOBALS --------
const DEBUG = false;
// Possible resolution choices (in decreasing order, i.e. highres is the best):
const resolutions = ['highres', 'hd2880', 'hd2160', 'hd1440', 'hd1080', 'hd720', 'large', 'medium', 'small', 'tiny'];
// youtube is always 16:9 right now, but has to be at least 480x270 for the player UI
const heights = [4320, 2880, 2160, 1440, 1080, 720, 480, 360, 270, 270];
const widths = [7680, 5120, 3840, 2560, 1920, 1280, 854, 640, 480, 480];
let doc = document; let win = window;
// --------------------
function debugLog(message)
{
if (!DEBUG)
{
return;
}
console.log(message);
}
// --------------------
// Get video ID from the currently loaded video (which might be different than currently loaded page)
function getVideoIDFromURL(ytPlayer)
{
const idMatch = /(?:v=)([\w\-]+)/;
let videoURL = ytPlayer.getVideoUrl();
let id = idMatch.exec(videoURL)[1] || "YTHD | ERROR: idMatch failed; youtube changed something";
return id;
}
// --------------------
// Attempt to set the video resolution to desired quality or the next best quality
function setResolution(ytPlayer, resolutionList)
{
debugLog("YTHD | Setting Resolution...");
// Youtube doesn't return "auto" for auto, so set to make sure that auto is not set by setting
// even when already at target res or above, but do so without removing the buffer for this quality
if (resolutionList.indexOf(targetRes) >= resolutionList.indexOf(ytPlayer.getPlaybackQuality()))
{
ytPlayer.setPlaybackQuality(targetRes);
debugLog("YTHD | Resolution Set To: " + targetRes);
}
else
{
const len = resolutionList.length;
let nextBestIndex = resolutionList.indexOf(targetRes) || 0;
let ytResolutions = ytPlayer.getAvailableQualityLevels();
debugLog("YTHD | Available Resolutions: " + ytResolutions.join(", "));
while ( (ytResolutions.indexOf(resolutionList[nextBestIndex]) === -1) && nextBestIndex < (len-1) )
{
++nextBestIndex;
}
if (flushBuffer && ytPlayer.getPlaybackQuality() !== resolutionList[nextBestIndex])
{
let id = getVideoIDFromURL(ytPlayer);
let pos = ytPlayer.getCurrentTime();
ytPlayer.loadVideoById(id, pos, resolutionList[nextBestIndex]);
debugLog(id);
}
ytPlayer.setPlaybackQuality(resolutionList[nextBestIndex]);
debugLog("YTHD | Resolution Set To: " + resolutionList[nextBestIndex]);
}
}
// --------------------
// Set resolution, but only when API is ready (it should normally already be ready)
function setResOnReady(ytPlayer, resolutionList)
{
if ( (ytPlayer.getPlayerState === undefined)
// || (ytPlayer.getPlayerState() === -1) // This prevents a youtube bug where the video buffer gets stuck
)
{
win.setTimeout(setResOnReady, 100, ytPlayer, resolutionList);
}
else
{
setResolution(ytPlayer, resolutionList);
}
}
// --------------------
// resize the player
function resizePlayer(ytPlayer, width, height)
{
debugLog("YTHD | Setting video player size");
let heightStr, widthStr, leftStr, playlistTop;
heightStr = height.toString() + "px !important";
widthStr = width.toString() + "px !important";
leftStr = (-width/2).toString() + "px !important";
// TODO: Do more research on this
playlistTop = (height - 360).toString() + "px !important";
let styleContent = "#page.watch-stage-mode .player-height { min-height: " + heightStr + "; } \
#page.watch-stage-mode .player-width { left: " + leftStr + "; min-width: " + widthStr + "; } \
#page.watch-stage-mode #watch-appbar-playlist {top: " + playlistTop + "; } \
";
let ythdStyle = doc.getElementById("ythdStyleSheet");
if (!ythdStyle)
{
ythdStyle = doc.createElement("style");
ythdStyle.type = "text/css";
ythdStyle.id = "ythdStyleSheet";
ythdStyle.innerHTML = styleContent;
doc.head.appendChild(ythdStyle);
}
else
{
ythdStyle.innerHTML = styleContent;
}
// Youtube's video player wont resize itself until interacted with so remind it to resize on video page
if (ytPlayer)
{
ytPlayer.setSize(width, height);
}
}
// --- MAIN -----------
let width, height;
if (useCustomSize)
{
height = customHeight;
width = customWidth;
}
else
{
let mastheadHeight = parseInt(win.getComputedStyle(doc.getElementById("masthead-positioner-height-offset")).height, 10) || 50;
let mastheadPadding = (parseInt(win.getComputedStyle(doc.getElementById("yt-masthead-container")).paddingBottom, 10) * 2) || 16;
let heightOffset = mastheadHeight + mastheadPadding;
let i = resolutions.indexOf(targetRes) || 0;
height = Math.min(heights[i], win.innerHeight - heightOffset);
width = Math.min(widths[i], win.innerWidth);
}
let ytPlayer = doc.getElementById("movie_player") || doc.getElementsByClassName("html5-video-player")[0];
if (changePlayerSize)
{
resizePlayer(ytPlayer, width, height);
}
if (changeResolution)
{
if (ytPlayer)
{
setResOnReady(ytPlayer, resolutions);
}
window.addEventListener("loadstart", function() {
ytPlayer = ytPlayer || doc.getElementById("movie_player") || doc.getElementsByClassName("html5-video-player")[0];
if (ytPlayer)
{
setResOnReady(ytPlayer, resolutions);
}
}, true );
}
})();