Subtitle Workshop (download)
With subtitle workshop we can easily split or join subtitles. In this tutorial I'm gonna show you how to split subtitle in 2 pieces.
Lets load our subtitle:
File > Load subtitle...
Tools > Split subtitle...
New window will show. Choose where to split it, you can split it by time, frame or item number, if you have video press on end of video and browse. Name your files, choose location and output format (.srt -SubRip and .sub - DVD Subtitle) and press on split.
We are done now try and play your video and subtitles in your favorite player.