Anime on my psp

Ok so i got a program that converts the .avi files to the psp format. But the program im using only uses the file extension srt so how do I convert my .sub file into a srt file?

Replying to #1

What are the other files...Sounds like a dvd rip or something.

oh sorry the other file is .idx

The psp doesn't recognize subtitle files. If you really wanted to watch anime with subtitles you would have to hardsub them into the video. To convert the subtitle files into another format I use subtitle workshop but I can't remember if that will suppport idx format.