'When I'am Run PHP Exec Always Return Code 1

I'am currently try a YoloV5 you can see here, and here i'am try to run detect.py using php exec this is my code

<?php

$yolo_dir = "/var/www/yolov5";
$upload_tujuan = "/var/www/gambar";
$detect_file = $yolo_dir . '/detect.py';
$model_path = "/var/www/yolov5/runs/train/exp/weights/best.pt";

$nama = time() . '_' . $_FILES['file']['name'];
$file_tmp = $_FILES['file']['tmp_name'];
$full_file_path = $upload_tujuan . DIRECTORY_SEPARATOR . $nama;
$moved = move_uploaded_file($file_tmp,  $full_file_path);

$hasil_eksekusi = exec("/usr/bin/python3 " . $detect_file ." --weights ". $model_path ." --img 416 --conf 0.1 --source ". $full_file_path ." --exist-ok", $output, $error);

print_r($output);
print_r($error);

but after i run thats command the results always return code 1. I'am use apache as web server PHP 7.4. And i was read this solution, i'am can't understand it. Anyone can help me please?

pythonphplaravelexecyolov5


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