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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://fonts.googleapis.com/css2?family=Work+Sans:ital,wght@0,100..900;1,100..900&display=swap"
rel="stylesheet">
<style>
:root {
--font: 'Work Sans', sans-serif;
--background: #151515;
--input: #353535;
--text: #fafafa;
--accent: #1f5e92;
}
body {
background-color: var(--background);
color: var(--text);
font-family: var(--font);
padding: 10px;
}
textarea,
button,
input:not([type=checkbox]) {
width: 100%;
width: -webkit-fill-available;
width: -moz-available;
font-family: var(--font);
padding: 10px;
border-radius: 8px;
border: 1px solid var(--text);
color: var(--text);
}
button {
background-color: var(--accent);
transition: 0.2s ease-in-out;
}
button:hover {
filter: brightness(150%);
}
button:active {
filter: brightness(175%);
scale: 0.95;
}
textarea,
input {
background-color: var(--input);
}
textarea {
height: 25vh;
}
.flex {
display: flex;
}
.hcenter {
align-items: center;
}
.gap {
gap: 10px;
}
a {
color: var(--text)
}
</style>
<title>FFmpeg Chapter</title>
</head>
<body>
<h1>FFmpeg Chapter Creator</h1>
<p>Paste the description timestamps here, or <span id="fileRead" style="text-decoration: underline;">read from a
file</span></p>
<textarea id="text"></textarea><br><br>
<label class="flex hcenter gap">
Divider:
<input id="divider" type="text">
</label><br>
<label class="flex hcenter gap">
Video length (in HH:MM:ss):
<input type="text" id="length">
<button id="getLength">Get from video</button>
</label><br>
<label class="flex hcenter gap">
<input type="checkbox" id="timestampRight"> The timestamp is at the right
</label>
<br><br>
<button id="download">Download FFmetadata text</button><br><br>
<p>You can add metadata in this way:
<code>ffmpeg -i video.mp4 -ffmetadata -i ffmetadata.txt -map_metadata 1 -c copy out.mp4</code><br>Otherwise,
<a target="_blank" href="https://dinoosauro.github.io/ffmpeg-merge-command/">click here to automatically
generate the script to copy</a> (you'll just need to choose the files and the
output extension)
</p>
<p>You can find more on the <a target="_blank" href="https://github.com/dinoosauro/ffmpeg-chapters-fetcher">GitHub
repository</a></p>
<script>
document.getElementById("download").onclick = () => {
let str = ";FFMETADATA1";
const divider = document.getElementById("divider").value;
const textSplit = document.getElementById("text").value;
const textSplitted = textSplit.split("\n");
for (let i = 0; i < textSplitted.length; i++) {
const currentStr = textSplitted[i];
const { timestamp, text } = getTimestampAndText(currentStr, divider);
if (currentStr.indexOf(divider) === -1) continue;
str += `\n[CHAPTER]\nTIMEBASE=1/1000000000\nSTART=${formatTimestamp(timestamp)}\nEND=${formatTimestamp(textSplitted[i + 1] ? getTimestampAndText(textSplitted[i + 1], divider).timestamp : (document.getElementById("length").value.trim() || "0"))}\ntitle=${text}`;
}
Object.assign(document.createElement("a"), {
href: URL.createObjectURL(new Blob([str], { type: "text/plain" })),
download: "ffmetadata.txt"
}).click();
}
function getTimestampAndText(str, divider) {
const isTimestampAtRight = document.getElementById("timestampRight").checked;
const timestamp = str.substring(isTimestampAtRight ? str.lastIndexOf(divider) + divider.length : 0, isTimestampAtRight ? undefined : str.indexOf(divider));
const text = str.substring(isTimestampAtRight ? 0 : str.indexOf(divider) + divider.length, isTimestampAtRight ? str.lastIndexOf(divider) : undefined);
return { timestamp, text };
}
function formatTimestamp(timestamp) {
let returnInt = 0;
const splittedTimestamp = timestamp.split(":");
if (splittedTimestamp.length === 3) returnInt = (+splittedTimestamp[0] * 3600) + (+splittedTimestamp[1] * 60) + +splittedTimestamp[2]; else returnInt = (+splittedTimestamp[0] * 60) + +splittedTimestamp[1];
return `${returnInt}000000000`;
}
document.getElementById("getLength").onclick = () => {
Object.assign(document.createElement("input"), {
type: "file",
onchange: function (e) {
const video = Object.assign(document.createElement("video"), {
src: URL.createObjectURL(e.target.files[0]),
onloadedmetadata: function (e) {
let duration = e.target.duration;
let outputFormat = "";
let hoursAdded = false;
if (duration >= 3600) {
const hours = Math.floor(duration / 3600);
duration -= (hours * 3600);
outputFormat += `${hours}:`;
hoursAdded = true;
}
if (duration < 60 && hoursAdded) hoursAdded += "00:";
if (duration >= 60) {
const minutes = Math.floor(duration / 60);
duration -= (minutes * 60);
outputFormat += `${minutes}:`;
}
outputFormat += `${Math.floor(duration)}`;
document.getElementById("length").value = outputFormat;
}
})
}
}).click();
}
document.getElementById("fileRead").onclick = () => {
console.log("Click");
Object.assign(document.createElement("input"), {
type: "file",
onchange: async function (e) {
document.getElementById("text").value = await e.target.files[0].text();
}
}).click();
}
</script>
</body>
</html>