<?php $capture = OpenCV\Capture::createFileCapture('movie.avi'); $image = $capture->queryFrame(); $result = $image->haarDetectObjects("data/haarcascades/haarcascade_frontalface_default.xml"); foreach ($result as $r) { $image->rectangle($r['x'], $r['y'], $r['width'], $r['height']); } $image->save('/tmp/video.jpg');