static function split_screen_video($files)
{
$total = count($files);
// @TODO: dynamic size needed
$input_size = new ffmpeg_size(1280, 720);
// @TODO: find/get the length of the longest movie
// alternatively, use something like -shortest to 'movie=' filter
$ffmpeg = ffmpeg_presets::empty_movie($input_size->to_string(), 300);
// find the size of the cube
if (in_array($total, range(1, 4))) {
$cube = 2;
} else {
if (in_array($total, range(5, 9))) {
$cube = 3;
} else {
if (in_array($total, range(10, 16))) {
$cube = 4;
} else {
$cube = 1;
}
}
}
$output_w = $input_size->width / $cube;
$output_h = $input_size->heigth / $cube;
// from top to bottom, left to right
$points = array();
for ($i = 0; $i < $total; $i++) {
$row = floor($i / $cube);
$colm = $i % $cube;
$px = round($colm * $output_w);
$py = round($row * $output_h);
// echo $row . ":" . $colm . "\t" . $px . ":" . $py . PHP_EOL;
$points[$i] = new ffmpeg_point($colm * $output_w, $row * $output_h);
$ffmpeg->video_filter->overlay_with_filters($files[$i], $points[$i]->x, $points[$i]->y, ffmpeg_filter::scale($input_size->width / $cube, $input_size->heigth / $cube));
}
return $ffmpeg;
}
public function transpose($transpose_degree)
{
switch ($transpose_degree) {
case 0:
return false;
break;
case 90:
case 270:
$info = $this->ffmpeg_wrapper->last_input_info_video;
$currnet_width = $info["width"];
$current_height = $info["height"];
$new_width = intval($current_height * ($current_height / $currnet_width));
$new_heigth = intval($current_height);
$padcenter_filter = ffmpeg_filter::filter_with_params("pad", array($currnet_width, $current_height, "(ow-iw)/2", "(oh-ih)/2"), array(), array());
$scale_filter = ffmpeg_filter::filter_with_params("scale", array($new_width, $new_heigth), array(), array(), $padcenter_filter);
$this->add_simple_filter_with_filter("transpose", array(1), $scale_filter);
if ($transpose_degree == 270) {
$this->hflip();
}
return true;
break;
case 180:
$this->hflip();
$this->vflip();
return true;
break;
default:
return false;
break;
}
return false;
}