<?php

$video_key = "2f0138014838a7c061093e767c80e0cb66f8792ae8d693293992eed673e40445";
$video_id = 1;
$uid = 1;
$part_key = kvideo_part_key($video_key, $video_id, 0, $uid);
echo $part_key;
// 976518ff226c8454cfaa3cd8ba138a5d
$file = "demo-video/seg-0.ts";
$data = file_get_contents($file);
$data2 = kvideo_encrypt($data, $video_key, $part_key);
file_put_contents("demo-video-encrypted/seg-0.ts.bad", $data2);