It's likely the second most popular subtitle format, after Subrip.

Type of format: Text / Elapsed time

Format:

[Script Info]
Title: <untitled>
Original Script: <unknown>
ScriptType: v4.00

[V4 Styles]
Format: Name, FontName, FontSize, PrimaryColour, SecondaryColour, TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding
Style: Default,Arial,23,16777215,0,16777215,0,-1,0,1,0,0,2,0,0,10,0,0

[Events]
Format: Marked, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: Marked=0,h:mm:ss.cs,h:mm:ss.cs,Default,NTP,0000,0000,0000,!Effect,line
Dialogue: Marked=0,h:mm:ss.cs,h:mm:ss.cs,Default,NTP,0000,0000,0000,!Effect,line
Dialogue: Marked=0,h:mm:ss.cs,h:mm:ss.cs,Default,NTP,0000,0000,0000,!Effect,line

Details:

h: hours (1 digit)
mm: minutes (2 digits)
ss: seconds (2 digits)
cs: centiseconds (2 digits)
line: plain text lines, separated by line breaks.

Notes:

  • It supports the use of styles. Several styles might be defined in a certain file and each line must contain only one style. In the example, only one style is shown and goes by the name of Default.
  • Allows several parameters and in a variable order, specified inside the file.

Examples:

[Script Info]
Title: <untitled>
Original Script: <unknown>
ScriptType: v4.00

[V4 Styles]
Format: Name, FontName, FontSize, PrimaryColour, SecondaryColour, TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding
Style: Default,Arial,23,16777215,0,16777215,0,-1,0,1,0,0,2,0,0,10,0,0

[Events]
Format: Marked, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: Marked=0,0:00:08.67,0:00:10.23,Default,NTP,0000,0000,0000,!Effect,¿De donde viene...
Dialogue: Marked=0,0:00:10.79,0:00:11.99,Default,NTP,0000,0000,0000,!Effect,...Esta búsqueda?
Dialogue: Marked=0,0:00:15.59,0:00:17.87,Default,NTP,0000,0000,0000,!Effect,Esta necesidad de resolver los misterios de la vida.

For more information, visit:

  • Advanced Substation Alpha