I have recently come across a requirement for a subtitling program that allows the subs to fade in and fade out. I need it to save the output in .STL or .SON formats for importing into DVDMaestro. DVDMaestro can add the fades individually, but there are over a thousand individual subs, so I would really like to automate this.

Does anyone know of a subtitling program that can do fades?