https://regexper.com/#%2F%5B0-9%5D%5Cs%5B0-9%5D%2F
http://regexone.com/lesson/more_groups
1280x720 提取出1280 720
((\d+)\D(\d+))
https://regexper.com/#%2F%5B0-9%5D%5Cs%5B0-9%5D%2F
http://regexone.com/lesson/more_groups
1280x720 提取出1280 720
((\d+)\D(\d+))