WP: Change oEmbed Width and Height

functions.php

<?php

/**
 * Changes oEmbed defaults dinamically
 */
function lr_oembed_defaults($embed_size) {
if(is_front_page()) {
	$embed_size['width'] = 940;
	$embed_size['height'] = 600;
}
else {
	$embed_size['width'] = 600;
	$embed_size['height'] = 338;
}
	return $embed_size;
}
add_filter('embed_defaults', 'lr_oembed_defaults');