About .SCR File Format
To work with SCR files in Anycount, let’s get to know a little more about this format.
The subtitle format MacSub uses the extension SCR. Information about the original program that used this format is scarse. Currently, a number of subtitle editors include support for MacSub. For example, Gnome Subtitles and Subtitle Workshop
Link:
Gnome Subtitles
Subtitle Workshop