getid3_ogg::TheoraPixelFormat( int $pixelformat_id ): string|null

919	public static function TheoraPixelFormat($pixelformat_id) {920		// http://www.theora.org/doc/Theora.pdf (table 6.4)921		static $TheoraPixelFormatLookup = array();922		if (empty($TheoraPixelFormatLookup)) {923			$TheoraPixelFormatLookup[0] = '4:2:0';924			$TheoraPixelFormatLookup[1] = 'Reserved';925			$TheoraPixelFormatLookup[2] = '4:2:2';926			$TheoraPixelFormatLookup[3] = '4:4:4';927		}928		return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null);929	}