SubRip is one of the most popular text-based subtitle formats. Since most subtitles are still ripped from DVDs they must be created by OCR.
The .SRT files are used by various video playback programs and are supported by DivX, DVD and other formats.
The .SRT is the most basic subtitle format. It consists of four parts, all in text.
FIRST is a number that indicates which subtitle is in the sequence. SECOND is the time that the subtitle should appear and then disappear. THIRD is the subtitle itself. FOURTH is a blank line indicating the start of a new subtitle.
The following is an example of the text structure/format:
1 00:00:45,000 --> 00:00:50,400 Hello
2 00:00:50,300 --> 00:00:58,200 Goodbye
In the above example, two subtitles will be generated. The first (number 1) will be displayed in your movie at 45 seconds for around 5 seconds. The second subtitle will be displayed at 50seconds for around 8 seconds.