HOWTO:Adding subtitles to your movies
From PardusWiki
Making a new subtitle file for Subtitle Composer.
As Subtitle Composer can not create a new empty subtitle file, open a new file in Kwrite and copy/paste
1 00:00:00,000 --> 00:00:00,000
including a <enter> (or CR) at the end of line 2.
Save this file as any_name.srt