subtitle software

Whats the best subtitle software out there for increasing font size ?

I'm planning to covert mp4's (with soft subtitles) to dvd's, but the problem, there too small on the big screen.

I've found http://www.aegisub.org/, but i think this only does "per-subtitle" basis, and not all at once, which would be a real time saver..

Since the result will be converted to dvd anyway, playback shouldn't be a problem.

any suggestions?

 

Found better software on windows.

CovertX to dvd.

I dunno why, but Mac's aren't up to the task of subtitle editing and preserving.