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Download video from Vimeo (chopped m4s files)
// 1. Open the browser developper console on the network tab
// 2. Start the video
// 3. In the dev tab, locate the load of the "master.json" file, copy its full URL
// 4. Run: node vimeo-downloader.js "<URL>"
// (done automatically now) 5. Combine the m4v and m4a files with mkvmerge
const fs = require('fs');
const url = require('url');
const https = require('https');
const { exec } = require('child_process');
let masterUrl = process.argv[2];
if (!masterUrl.endsWith('?base64_init=1')) {
masterUrl+= '?base64_init=1';
}
getJson(masterUrl, (err, json) => {
if (err) {
throw err;
}
const videoData = json.video.sort((v1,v2) => v1.avg_bitrate - v2.avg_bitrate).pop();
const audioData = json.audio.sort((a1,a2) => a1.avg_bitrate - a2.avg_bitrate).pop();
const videoBaseUrl = url.resolve(url.resolve(masterUrl, json.base_url), videoData.base_url);
const audioBaseUrl = url.resolve(url.resolve(masterUrl, json.base_url), audioData.base_url);
processFile('video', videoBaseUrl, videoData.init_segment, videoData.segments, json.clip_id + '.m4v', (err) => {
if (err) {
throw err;
}
processFile('audio', audioBaseUrl, audioData.init_segment, audioData.segments, json.clip_id + '.m4a', (err) => {
if (err) {
throw err;
}
console.log('combining video and audio...');
let combineCmd = 'ffmpeg -i ' + json.clip_id + '.m4v -i ' + json.clip_id + '.m4a -c copy ' + json.clip_id + '.mp4';
exec(combineCmd, (err, stdout, stderr) => {
if (err) {
throw err;
}
console.log(`stdout: ${stdout}`);
console.log(`stderr: ${stderr}`);
console.log('removing video and audio in favor of combined version...');
fs.unlink(json.clip_id + '.m4v', (err) => {
if (err) {
throw err;
}
fs.unlink(json.clip_id + '.m4a', (err) => {
if (err) {
throw err;
}
console.log('all done');
});
});
});
});
});
});
function processFile(type, baseUrl, initData, segments, filename, cb) {
if (fs.existsSync(filename)) {
console.log(`${type} already exists`);
return cb();
}
const segmentsUrl = segments.map((seg) => baseUrl + seg.url);
const initBuffer = Buffer.from(initData, 'base64');
fs.writeFileSync(filename, initBuffer);
const output = fs.createWriteStream(filename, {flags: 'a'});
combineSegments(type, 0, segmentsUrl, output, (err) => {
if (err) {
return cb(err);
}
output.end();
cb();
});
}
function combineSegments(type, i, segmentsUrl, output, cb) {
if (i >= segmentsUrl.length) {
console.log(`${type} done`);
return cb();
}
console.log(`Download ${type} segment ${i}`);
https.get(segmentsUrl[i], (res) => {
res.on('data', (d) => output.write(d));
res.on('end', () => combineSegments(type, i+1, segmentsUrl, output, cb));
}).on('error', (e) => {
cb(e);
});
}
function getJson(url, cb) {
let data = '';
https.get(url, (res) => {
res.on('data', (d) => data+= d);
res.on('end', () => cb(null, JSON.parse(data)));
}).on('error', (e) => {
cb(e);
});
}
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