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Format

SubRip Subtitle File

Summary

Name
SubRip Subtitle File
Identifiers
PUID: fmt/1218
Format type
Text (Structured)
Description
SubRip subtitle files contain formatted lines of plain text in groups separated by a blank line. Subtitles are numbered sequentially, starting at 1. The timecode format used is hours:minutes:seconds,milliseconds, with time units fixed to two zero-padded digits and fractions fixed to three zero-padded digits, e.g. '00:00:00,000'.
Note
https://www.matroska.org/technical/subtitles.html#srt-subtitles https://en.wikipedia.org/wiki/SubRip
File extensions
srt
Submitted by
National Library of New Zealand / National Library of New Zealand

Internal signatures

SubRip Subtitle File

Description
Absolute from beginning of file, offset 0-64: xx:xx:xx,xxxxxx --> xx:xx:xx,xxx where each x is a numeric value 0-9

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
64
Byte Sequence
[30:39][30:39]3A[30:39][30:39]3A[30:39][30:39]2C[30:39][30:39][30:39]202D2D3E20[30:39][30:39]3A[30:39][30:39]3A[30:39][30:39]2C[30:39][30:39][30:39]
Endianness
None

Changelog

  • V112

    Release date
    10 May 2023
    • Updated

      SubRip Subtitle File: Updated description and added reference links. Submitted by Digital Preservation Department, The National Archives (UK).

  • V110

    Release date
    14 March 2023
    • Added signature

      SubRip Subtitle File: Signature researched and samples provided by Preservica.

    • Updated

      SubRip Subtitle File: Added internal signature. Submitted by Preservica.

  • V95

    Release date
    9 May 2019
    • Added format

      SubRip Subtitle File: Extension-only entry added. Submitted by National Library of New Zealand.