Extract photo from movie - app recommendations for iPad OS?

You can take a screen shot of a movie and thus have a photo of one scene, but you have then a lower resolution picture than that of the movie (if you’ve taken a “quality” movie).

Is there a recommended app you can use on the iPad to extract stills - photos - from movies?

Free, freemium, $3:

Excellent suggestions, will follow up now. Thanks!

Snap Motion. This is from a developer with a good reputation. One of his apps, Metalimage, is available through Setapp, but not Snap Motion. I keep hoping Snap Motion will be offered through Setapp, but no luck so far.

Just found the Mac App Store link: