telebot-reverser/reverser.js

const path = require('path');
const ffmpeg = require('fluent-ffmpeg');

//const {path: ffPath} = require('@ffmpeg-installer/ffmpeg');
//ffmpeg.setFfmpegPath(ffPath);

const reverse = file => {
	return new Promise((resolve, reject) => {
		const basename = path.basename(file);
		const savepath = path.join('/tmp', 're-' + basename);
		ffmpeg(file)
			.videoFilter('reverse')
			.on('error', error => reject(error))
			.on('end', async () => resolve({
				path: savepath
			}))
			.save(savepath);
	});
};

module.exports = {
	reverse
};