VeryDOC Flash to PNG Converter Command Line can be called with other software application.It will help you tackle the trouble during file format converting,say from video to jpg.

Flash to PNG Converter Command Line supports these options:
1.-in: input SWF file name.
2.-out: output image file name.
3.-width and -height: set the width and height of converted image.
4.-timer: set the capture interval of conversion, in unit of millisecond.
5.-hidewindow: hide the progress dialog during conversion.
6.-$: register the application with a registration key.