Frame Grab is provides you to extract frame images from your movies very easily.
The images will be saved as JPEG, PNG or TIFF file format.
Supported movie formats
・QuickTime movie (mov)
・MP4 file (mp4, m4v, m4a)
Files that requires a conversion or codec components in QuickTime Player cannot be opened or video tracks of them cannot be displayed.
To open movies:
Choose File > Open and select the movie file(s). Or drag the file(s) to the Frame Grab application icon.
Fixes an issue where the app is crashed when doing play/pause after using two fingers gesture on the trackpad in OS X 10.10
Mac App Store: https://itunes.apple.com/app/frame-grab/id615342340?mt=12