Adds keyboard shortcuts for controlling HTML5 media player (audio/video) with OSD support. Seek media to 0%, 5%, 10%, ..., or 95%. Rewind and fast fordward media by 30 seconds, 1 minute, and 5 minutes. Change media speed even beyond YouTube's speed limit. Change audio volume to 20%, 40%, 60%, 80%, or 100%. Change video aspect ratio for TV and letterbox content (for widescreen monitors).
// ==UserScript==
// @name HTML5 Audio/Video Keyboard Shortcuts With OSD
// @namespace https://greasyfork.org/en/users/85671-jcunews
// @version 1.2.17
// @license AGPLv3
// @author jcunews
// @description Adds keyboard shortcuts for controlling HTML5 media player (audio/video) with OSD support. Seek media to 0%, 5%, 10%, ..., or 95%. Rewind and fast fordward media by 30 seconds, 1 minute, and 5 minutes. Change media speed even beyond YouTube's speed limit. Change audio volume to 20%, 40%, 60%, 80%, or 100%. Change video aspect ratio for TV and letterbox content (for widescreen monitors).
// @match *://*/*
// @grant none
// @run-at document-start
// ==/UserScript==
/*
Notes:
- Some shortcuts won't work on non US keyboards. Non US keyboard users will need to manually edit the keys in the script.
- In YouTube, if the video speed is below 0.25x or above 2x, the YouTube setting display will be capped to 0.1x or 2x.
- Web browser video speeds: Firefox = 0.25 to 5.0; Chrome = 0.1 to 16.0.
Keyboard Shortcuts:
CTRL+, = Rewind media by 1/30th second
CTRL+. = Fast forward media by 1/30th second
CTRL+SHIFT+/ = Next frame (when paused; Firefox only)
SHIFT+LEFT = Rewind media by 30 seconds
SHIFT+RIGHT = Fast forward media by 30 seconds
CTRL+LEFT = Rewind media by 1 minute
CTRL+RIGHT = Fast forward media by 1 minute
CTRL+SHIFT+LEFT = Rewind media by 5 minutes
CTRL+SHIFT+RIGHT = Fast forward media by 5 minutes
CTRL+/ = Fast forward media by 1.5 minutes
0 to 9 = Seek media to 0%, 10%, 20%,...90%
SHIFT+0 to SHIFT+9 = Seek media to 5%, 15%, 25%,...95%
CTRL+1 to CTRL+5 = Change audio volume to 20%, 40%, 60$, 80%, 100%
CTRL+[ = Decrease media speed by 0.2x (by default)
CTRL+] = Increase media speed by 0.2x (by default)
CTRL+; = Reset media speed
CTRL+' = Change custom media speed
CTRL+\ = Change unit of media speed increment/decrement
For Widescreen Video Viewport:
CTRL+6 = Change video aspect ratio for widescreen content. Fix widescreen content shrunk to 4:3 TV format.
CTRL+7 = Change video aspect ratio for letterbox content. Fix 4:3 letterbox content stretched to widescreen format.
CTRL+8 = Change video aspect ratio for TV content. Fix 4:3 TV content stretched to widescreen format.
For 4:3 TV Video Viewport:
CTRL+SHIFT+6 = Change video aspect ratio for ultra widescreen content. Fix ultra widescreen content compressed into 4:3 TV format.
CTRL+SHIFT+7 = Zoom 4:3 letterbox content to remove half of top+bottom borders, but also remove left+right content a little.
This can also be used to half-zoom ultra widescreen content on widescreen viewport. i.e. half-zoom of CTRL+6.
CTRL+SHIFT+8 = Change video aspect ratio for widescreen content. Fix widescreen content compressed into 4:3 TV format.
For Any Video Viewport:
CTRL+9 = Reset video aspect ratio
ALT+S = Take screenshot if current video frame (in its original size and aspect ratio)
*/
((eleOSD, osdTimer) => {
//=== CONFIGURATION BEGIN ===
//Video speed increment/decrement unit.
var incrementUnit = 0.2;
//Duration (in milliseconds) to display On Screen Display (OSD) when changing playback rate. Set to zero or less to disable.
var osdTimeout = 3000;
//Image format for video frame screenshot
var imageFormat = "jpeg"; //can be jpeg or png
//Keyboard shortcuts.
//key = Key name. String type if single shortcut, or array of string if multiple shortcut (for single function multiple shortcuts).
// Each key name can either be the uppercased character which is produced by the key (e.g. `A`, `4`, `*`, etc.),
// or the code name for the key (e.g. `Digit2`, `BracketLeft`, etc.). Both types are case sensitive.
// When SHIFT modifier is used with keys which produces a character, key code name should be used.
// A list of key code names can be found here: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code/code_values
//modifiers = Any combinations of "C", "S", and "A", for Ctrl, Shift, and Alt keys.
var keys = [
{ //ctrl+space: seek media to next frame (only when paused. firefox only)
key: " ", modifiers: "C",
func: (key, ele) => ele.seekToNextFrame && ele.seekToNextFrame()
},
{ //0 to 9: seek media to 0%,10%,20%,...90%
key: ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"], modifiers: "",
func: (ele, key, keyIndex) => ele.currentTime = keyIndex / 10 * ele.duration
},
{ //shift+0 to shift+9: seek media to 5%,15%,25%,...95%
key: [")", "!", "@", "#", "$", "%", "^", "&", "*", "("], modifiers: "S",
func: (ele, key, keyIndex) => ele.currentTime = (keyIndex + 0.5) / 10 * ele.duration
},
{ //ctrl+1 to ctrl+5: set audio volume to 20%,40%,60%,80%,100%
key: ["1", "2", "3", "4", "5"], modifiers: "C",
func: (ele, key, keyIndex) => updAudioVolume(ele, (parseInt(key) * 2) / 10)
},
{ //shift+left: rewind media by 30 seconds
key: "ArrowLeft", modifiers: "S",
func: (ele, key) => ele.currentTime -= 30
},
{ //ctrl+left: rewind media by 1 minute
key: "ArrowLeft", modifiers: "C",
func: (ele, key) => ele.currentTime -= 60
},
{ //ctrl+shift+left: rewind media by 5 minutes
key: "ArrowLeft", modifiers: "CS",
func: (ele, key) => ele.currentTime -= 300
},
{ //ctrl+,: rewind media by 1/30 second
key: ",", modifiers: "C",
func: (ele, key) => ele.currentTime -= 1/30
},
{ //shift+right: fast forward media by 30 seconds
key: "ArrowRight", modifiers: "S",
func: (ele, key) => ele.currentTime += 30
},
{ //ctrl+right: fast forward media by 1 minute
key: "ArrowRight", modifiers: "C",
func: (ele, key) => ele.currentTime += 60
},
{ //ctrl+shift+right: fast forward media by 5 minutes
key: "ArrowRight", modifiers: "CS",
func: (ele, key) => ele.currentTime += 300
},
{ //ctrl+.: fast forward media by 1/30th second
key: ".", modifiers: "C",
func: (ele, key) => ele.currentTime += 1/30
},
{ //ctrl+shift+/: next frame (when paused; firefox only)
key: "?", modifiers: "CS",
func: (ele, key) => ele.seekToNextFrame && ele.seekToNextFrame()
},
{ //ctrl+/: fast forward media by 1.5 minutes
key: "/", modifiers: "C",
func: (ele, key) => ele.currentTime += 87
},
{ //ctrl+[: decrease media speed
key: "[", modifiers: "C",
func: (ele, key) => {
key = ele.playbackRate - incrementUnit;
if (key < 0.1) {
key = 0.1;
} else if ((key < 1) && (ele.playbackRate > 1)) key = 1;
updVideoSpeed(ele, key);
}
},
{ //ctrl+]: increase media speed
key: "]", modifiers: "C",
func: (ele, key) => {
key = ele.playbackRate + incrementUnit;
if (key > 16) {
key = 16;
} else if ((key > 1) && (ele.playbackRate < 1)) key = 1;
updVideoSpeed(ele, key);
}
},
{ //ctrl+;: reset media speed to 1x
key: ";", modifiers: "C",
func: (ele, key) => updVideoSpeed(ele, 1)
},
{ //ctrl+': use custom media speed
key: "'", modifiers: "C",
func: (ele, key) => {
if ((key = prompt("Enter media speed from 0.1 to 16 (inclusive).\ne.g.: 1 = Normal, 0.5 = Half, 2 = Double, 3 = Triple, etc.", ele.playbackRate)) === null) return;
if (isNaN(key = parseFloat(key.trim()))) {
alert("Input must be a number.");
return;
}
updVideoSpeed(ele, (key = parseFloat(key.toFixed(1))) < 0.1 ? 0.1 : (key > 16 ? 16 : key));
}
},
{ //ctrl+\: change unit of media speed increment/decrement
key: "\\", modifiers: "C",
func: (ele, key) => {
if ((key = prompt("Enter unit of media speed increment/decrement from 0.1 to 4 (inclusive).", incrementUnit)) === null) return;
if (!isNaN(key = parseFloat(key.trim()))) {
incrementUnit = (key = parseFloat(key.toFixed(1))) < 0.1 ? 0.1 : (key > 4 ? 4 : key);
} else alert("Input must be a number.");
}
},
{ //ctrl+6: Widescreen aspect ratio
key: "6", modifiers: "C", videoOnly: true,
func: (ele, key) => updVideoAspect("scaleX(1.3333)", "Widescreen")
},
{ //ctrl+7: Letterbox aspect ratio
key: "7", modifiers: "C", videoOnly: true,
func: (ele, key) => updVideoAspect("scaleY(1.3333)", "Letterbox")
},
{ //ctrl+8: TV aspect ratio
key: "8", modifiers: "C", videoOnly: true,
func: (ele, key) => updVideoAspect("scaleX(0.75)", "TV")
},
{ //ctrl+shift+6: Ultra widescreen aspect ratio
key: "Digit6", modifiers: "CS", videoOnly: true,
func: (ele, key) => updVideoAspect("scaleY(0.7168)", "Ultra Widescreen")
},
{ //ctrl+shift+7: Half-zoom letterbox
key: "Digit7", modifiers: "CS", videoOnly: true,
func: (ele, key) => updVideoAspect("scale(1.1666)", "Letterbox Half-Zoom")
},
{ //ctrl+shift+8: Widescreen on TV
key: "Digit8", modifiers: "CS", videoOnly: true,
func: (ele, key) => updVideoAspect("scaleY(0.5625)", "Widescreen On TV")
},
{ //ctrl+9: reset video aspect ratio
key: "9", modifiers: "C", videoOnly: true,
func: (ele, key) => updVideoAspect("", "Reset")
},
{ //alt+s: take screenshot of current video frame
key: "S", modifiers: "A", videoOnly: true,
func: (ele, key, cv, a) => {
cv = document.createElement("CANVAS");
if (cv.width = ele.videoWidth) {
cv.height = ele.videoHeight;
cv.getContext("2d").drawImage(ele, 0, 0);
a = document.createElement("A");
a.href = cv.toDataURL("image/" + imageFormat);
a.download = `video_frame_${ele.currentTime}.${imageFormat === "jpeg" ? "jpg" : imageFormat}`;
a.style.display = "none";
document.body.appendChild(a).click();
return a.remove()
}
}
}
];
keys.forEach((k, s, m) => {
if (Array.isArray(k.key)) {
k.key.forEach((s, i) => k.key[i] = k.key[i].toUpperCase());
} else k.key = k.key.toUpperCase();
s = k.modifiers.toUpperCase();
k.modifiers = {ctrl: s.includes("C"), shift: s.includes("S"), alt: s.includes("A")};
});
//=== CONFIGURATION END ===
function showOSD(s) {
if (osdTimeout < 0) return;
if (eleOSD) {
eleOSD.textContent = s;
} else {
eleOSD = document.createElement("DIV");
eleOSD.style.cssText = "position:fixed;z-index:999999999;right:.5rem;bottom:.5rem;margin:0;padding:.2rem .5rem .1rem .5rem;width:auto;height:auto;font:normal 16pt/normal sans-serif;background:#444;color:#fff";
eleOSD.textContent = s;
document.body.appendChild(eleOSD);
}
clearTimeout(osdTimer);
osdTimer = setTimeout(() => {
eleOSD.remove();
eleOSD = null;
}, osdTimeout);
}
function stopEvent(ev) {
ev.preventDefault();
ev.stopPropagation();
ev.stopImmediatePropagation();
}
function updVideoSpeed(ele, spd, e) {
ele.playbackRate = spd = parseFloat(spd.toFixed(1));
showOSD("Speed " + spd + "x");
}
function updVideoAspect(asp, label, s) {
if (!(s = document.getElementById("vidAspOvr"))) document.body.appendChild(s = document.createElement("STYLE")).id = "vidAspOvr";
s.innerHTML = asp ? `video{transform:${asp}!important}` : "";
showOSD("Ratio: " + label);
}
function updAudioVolume(ele, vol, e) {
if ((location.hostname === "www.youtube.com") && (e = ele.parentNode.parentNode).setVolume) {
e.setVolume(vol * 100);
} else ele.volume = vol;
showOSD("Audio " + (vol * 100) + "%");
}
function isVisible(ele) {
while (ele && ele.tagName) {
if (getComputedStyle(ele).display === "none") return false;
ele = ele.parentNode
}
return true
}
incrementUnit = parseFloat((incrementUnit < 0.1 ? 0.1 : (incrementUnit > 1 ? 1 : incrementUnit)).toFixed(1));
addEventListener("keydown", function(ev, ele) {
if ((!(ele = document.activeElement) || !((ele.contentEditable === "true") || ["BUTTON", "INPUT", "SELECT", "TEXTAREA"].includes(ele.tagName))) && (ele = document.querySelector("video,audio"))) {
keys.some((k, a, i) => {
a = Array.isArray(k.key);
if (
((!a && ((k.key === ev.key.toUpperCase()) || (k.key === ev.code))) || (a && (((i = k.key.indexOf(ev.key)) >= 0) || ((i = k.key.indexOf(ev.code)) >= 0)))) &&
(k.modifiers.ctrl === ev.ctrlKey) && (k.modifiers.shift === ev.shiftKey) && (k.modifiers.alt === ev.altKey) &&
(!k.videoOnly || (ele.tagName === "VIDEO")) && (isVisible(ele) || (ele.tagName === "AUDIO"))
) {
stopEvent(ev);
k.func(ele, ev.key, a ? i : null);
return true;
}
});
}
}, true);
})();