creating a custom og:image url – how to adjust other properties

I have been playing around with the option of creating an automatic migrator from webp to jpg for the og:image meta tag. Problem is, that the og:image properties (like width, height and type) don’t adjust or even reset when you adjust the URL. Seems like this is a bug in yoast, where if you override the URL, it should disregard these from the original image, but it doesnt.

Here is my code snippet:

add_filter('wpseo_opengraph_image', 'fix_image', 10, 2);
function fix_image($image, $present) {
	if( is_single()) {
		DoLog(var_export($image, true));
		$thumb= get_the_post_thumbnail_url(get_the_ID(), 'mobile');
		$thumbext= substr($thumb, -4);
		switch ($thumbext) {
			case '.png':
			case '.jpg':
				break;
			case 'webp':
				preg_match('/^((?:http|https)(?::\/\/)(?:.*?))((\/(?:.*?\/)*)((.*)(\..*)))$/i', $thumb,$match);
				$src= getcwd() . $match[2];
				$dir= '/thumb/';
				$ext= ".jpg";
				$thumb= $match[1] . $dir . $match[5] . $ext;
				$tgt= getcwd() . $dir . $match[5] . $ext;
				if (!file_exists($tgt)) {
					$im = imagecreatefromwebp($src);
					imagejpeg($im,$tgt, 100);
					imagedestroy($im);
				}
				break;
		}
		return $thumb;
	}
	return $image;
}

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