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I'm dying to know how I can make a GUI for ffmpeg and jhead in OSX. I've been looking for a solution for a while and thought you, stackoverflow's users, could help me. Maybe you know some document I haven't come across of or, better, a tutorial to make a GUI.
I love those two tools but I like the simplicity of drag/drop operations.
Note: I don't need a GUI for them, I want to make one.
If you are asking "How do I create a GUI application in Mac OS X that interfaces to a command line tool" the answer is NSTask. Although, if the command line tool provides a programming API, using that would be preferable to invoking the command line tool itself.
If you are asking "How do I create a GUI application in Mac OS X" the answer is to read a book about it and look at the Apple tutorial docs. Cocoa Programming on Mac OS X by Aaron Hillegass was my starting point.