Media player Entity Picture Aspect ratio

Hello,

Does any one know how to determine the aspect ratio or should I say size of an entity picture from the media_player entity_picture attribute?

For example I have one as this

/api/media_player_proxy/media_player.living_room_chromecast?token=69f137f193b81373f14e467ec0e306e84228a01a79a4b2d6a6bd4462fb8b8b91&cache=9d7fb5c8b4b973c3

How can I know from all the string, what the aspect ratio or size is?

Thanks