Getting error spawn ffmpeg ENOENT aws lambda

Question

I have being trying to debug but to no avail, I've done everything on the internet.

I Used WSL (Ubuntu) - Error: spawn usr/bin/ffmpeg ENOENT. I Used windows - Error: spawn path/to/ffmpeg.exe ENOENT. I had to SAM deploy --guide and then added a lambda layer on aws console. Moved Ffmpeg file to my project root folder also ENOENT.

Ffmpeg exists in those parts, "path/to/ffmpeg -version" prints version/other info.

I gave permissions using chmod +x, I used AI too.

3days of struggle

import { spawn } from 'child_process';
import ffmpeg from 'fluent-ffmpeg';
const isLocal = process.env.AWS_SAM_LOCAL; // Detect local SAM environment

const ffmpegPath = isLocal ? 'C:\\ProgramData\\chocolatey\\lib\\ffmpeg\\tools\\ffmpeg\\bin\\ffmpeg.exe' : '/opt/bin';

ffmpeg.setFfmpegPath(ffmpegPath);

const ffmpegArgs = [
      '-i',
      inputFilePath,
      '-vf',
      `crop=9/16*ih:ih:scale=1080:1920`,
      '-c:v',
      'libx264',
      '-c:a',
      'aac',
      '-strict',
      'experimental',
      outputFilePath,
    ];

    const ffmpegProcess = spawn(ffmpegPath, ffmpegArgs);

Update

After running "sam build", then I moved ffmpeg file into the build folder and changed the path to:

import { spawn } from 'child_process';
import ffmpeg from 'fluent-ffmpeg';

const ffmpegPath = path.resolve(__dirname, 'bin', 'ffmpeg');

ffmpeg.setFfmpegPath(ffmpegPath);

So i'm deploying with ffmpeg in my project folder rather than creating an ffmpeg layer in the console.

created a json file to move ffmpeg into build folder

{
  "scripts": {
    "prebuild": "echo 'Running prebuild...'",
    "build": "sam build",
    "postbuild": "cp -r ./api/bin ./.aws-sam/build/ProcessVideoFunction/ && echo 'bin copied'"
  }
}

Image of my Project Structure

Update 2

Okay, works on localhost but not when deployed.

No errors, ffmpeg doesn't run, tried with the ffmpeg-layer I created also but no progress.