static function video_consolidator($file, $new_width, $new_height)
{
$ffmpeg = new ffmpeg_wrapper();
$ffmpeg->add_input($file);
$ffmpeg->video->qscale(0);
// initialize flags
$info = ffmpeg_wrapper::video_stream_info($file);
$input_width = intval($info["width"]);
$input_heigth = intval($info["height"]);
$aspect_ratio = round(floatval($input_width / $input_heigth), 3);
$new_aspect_ratio = round(floatval($new_width / $new_height), 3);
/**
* fix letterbox videos
*/
$ffmpeg->fix_letterbox($file, $new_width, $new_height);
/**
* convert vertical videos
*/
$ffmpeg->fix_vertical($file);
/**
* check if padding is needed
*/
$ffmpeg->fix_aspect_ratio_normal($aspect_ratio, $new_aspect_ratio);
/**
* scale to new given sizes
*/
if ($input_width != $new_width || $input_heigth != $new_height) {
if (FFMPEG_WRAPPER_DEBUG_PRINTS) {
echo ">> scale needed" . PHP_EOL;
}
$ffmpeg->video_filter->scale($new_width, $new_height);
} else {
if (FFMPEG_WRAPPER_DEBUG_PRINTS) {
echo ">> no scale needed" . PHP_EOL;
}
}
return $ffmpeg;
}
public static function analyze_letterbox_video($file)
{
$info = ffmpeg_wrapper::video_stream_info($file);
$duration = $info["duration"];
$ffmpeg = new ffmpeg_wrapper();
// $ffmpeg->add_global_param("ss",floor($duration/2));
$ffmpeg->add_input($file);
$ffmpeg->audio->disable();
$ffmpeg->video->length(50);
$ffmpeg->video->format("rawvideo");
$ffmpeg->video_filter->cropdetect(16, 2, 0);
$ffmpeg->set_output("/dev/null");
$ffmpeg->run();
$crop_string_array = array();
foreach ($ffmpeg->response_string as $string) {
// if the string include
if (strpos($string, 'crop') !== false) {
$splitString = explode(" crop=", $string);
array_push($crop_string_array, $splitString[1]);
}
}
// find most common crop recommendation
$crop_map = array();
$common_crop = $crop_string_array[0];
$common_crop_count = 1;
for ($i = 0; $i < sizeof($crop_string_array); $i++) {
$current = $crop_string_array[$i];
if (!isset($crop_map[$current])) {
$crop_map[$current] = 1;
} else {
$crop_map[$current]++;
}
if ($crop_map[$current] > $common_crop_count) {
$common_crop = $current;
$common_crop_count = $crop_map[$current];
}
}
if (FFMPEG_WRAPPER_DEBUG_PRINTS) {
// echo "most common crop: " . $common_crop . PHP_EOL;
}
// check if crop is needed:
$frame_size = explode(":", $common_crop);
$aspect_ratio = explode(":", $info["display_aspect_ratio"]);
$ratio = $aspect_ratio[0] / $aspect_ratio[1];
$crop_ratio = $frame_size[0] / $frame_size[1];
if (FFMPEG_WRAPPER_DEBUG_PRINTS) {
// echo "input - width = " . $info["width"] . PHP_EOL;
// echo "input - height = " . $info["height"] . PHP_EOL;
// echo "input - aspect ratio = " . $ratio . PHP_EOL;
// echo "crop frame - width = " . $frame_size[0] . PHP_EOL;
// echo "crop frame - heigth = " . $frame_size[1] . PHP_EOL;
// echo "crop frame - aspect ratio = " . $crop_ratio . PHP_EOL;
}
if ($frame_size[0] != $info["width"] || $frame_size[1] != $info["height"]) {
return explode(":", $common_crop);
}
return null;
}
