birdgen/src/addExtraVideos.js

import fs from 'fs'
import exec from './exec.js'
let videos = []

let videoDurations = {
    
}

async function getRandomVideo() {
    let randomVideo = global.birdgenAssetPath+'video/'+videos[Math.floor(Math.random()*videos.length)]
    let duration
    if (videoDurations[randomVideo]) duration = videoDurations[randomVideo]
    else {
        const {stdout} = await exec(`ffprobe -i ${randomVideo} -v quiet -show_entries format=duration -hide_banner -of default=noprint_wrappers=1:nokey=1`)
        duration = parseFloat(stdout.trim()) * 1000
        videoDurations[randomVideo] = Math.floor(duration)
    }
    let response = {
        start: 0,
        end: videoDurations[randomVideo],
        filePath: randomVideo
    }
    let partsOfName = randomVideo.split('/').pop().split('.')
    if (partsOfName.length>2&&['music', 'sound'].includes(partsOfName.at(-2))) {
        response.force = partsOfName.at(-2)
    }
    return response
}

export default async function addExtraVideos(sections) {
    videos = fs.readdirSync(global.birdgenAssetPath+'video')
    let newList = []
    for (let i = 0; i < sections.length; i ++) {
        newList.push(sections[i])
        if (Math.random()>0.95) {
            for (let j = 0; j < Math.floor(Math.random()*10); j ++) {
                newList.push(sections[i])
            }
        }
        if (Math.random()>0.9) {
            newList.push(await getRandomVideo())
        }
    }
    return newList
}