running the formatVideoToWebpSticker function

this is my code trying to convert an mp4 to webp file. for some reason its not saving the file to my folder and when I console.logged it, it sent a path to my temp folder but the file wasn't there. Tried looking it up but found nothing helpful :( how to fix this please? thank you

const path = require('path');
const Crypto = require('crypto');
const { tmpdir } = require('os');
const ffmpeg = require('fluent-ffmpeg');
const webp = require('node-webpmux');
const fs = require('fs').promises;
const has = (o, k) => Object.prototype.hasOwnProperty.call(o, k);
const { MessageMedia } = require('whatsapp-web.js');

const media = MessageMedia.fromFilePath('./1.mp4');

async function formatVideoToWebpSticker(media) {
        if (!media.mimetype.includes('video'))
            throw new Error('media is not a video');
        const videoType = media.mimetype.split('/')[1];
        const tempFile = path.join(
            tmpdir(),
            `${Crypto.randomBytes(6).readUIntLE(0, 6).toString(36)}.webp`
        );
        const stream = new (require('stream').Readable)();
        const buffer = Buffer.from(
            media.data.replace(`data:${media.mimetype};base64,`, ''),
            'base64'
        );
        stream.push(buffer);
        stream.push(null);
        await new Promise((resolve, reject) => {
            ffmpeg(stream)
                .inputFormat(videoType)
                .on('error', reject)
                .on('end', () => resolve(true))
                .addOutputOptions([
                    '-vcodec',
                    'libwebp',
                    '-vf',
                    // eslint-disable-next-line no-useless-escape
                    'scale=\'iw*min(300/iw\,300/ih)\':\'ih*min(300/iw\,300/ih)\',format=rgba,pad=300:300:\'(300-iw)/2\':\'(300-ih)/2\':\'#00000000\',setsar=1,fps=10',
                    '-loop',
                    '0',
                    '-ss',
                    '00:00:00.0',
                    '-t',
                    '00:00:05.0',
                    '-preset',
                    'default',
                    '-an',
                    '-vsync',
                    '0',
                    '-s',
                    '512:512',
                ])
                .toFormat('webp')
                .save(tempFile)
                console.log(tempFile);
        });
        
        const data = await fs.readFile(tempFile, 'base64');
        console.log(tempFile)
        await fs.unlink(tempFile);
        return {
            mimetype: 'image/webp',
            data: data,
            filename: media.filename,
        };
    }
formatVideoToWebpSticker(media)