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SubRip is a software program for Windows which "rips" (extracts) subtitles and their timings from video. It is free software, released under the GNU GPL. SubRip is also the name of the widely used and broadly compatible subtitle text file format created by this software.

SubRip software

Using optical character recognition, SubRip can extract from live video, video files and DVDs, then record the extracted subtitles and timings as a Subrip format text file. It can optionally save the recognized subtitles as bitmaps for later subtraction (erasure) from the source video.

In practice, SubRip is configured with the correct codec for the video source, then trained by the user on the specific text area, fonts, styles, colors and video processing requirements to recognize subtitles. After trial and fine tuning, SubRip can automatically extract subtitles for the whole video source file during its playback. SubRip records the beginning and end times and text for each subtitle in the output text .srt file.

SubRip uses AviSynth to extract video frames from source video, and can rip subtitles from all video files supported by that program.

SubRip text file format

Specifications

The SubRip file format is "perhaps the most basic of all subtitle formats." SubRip (SubRip Text) files are named with the extension .srt, and contain formatted plain text. The time format used is hours:minutes:seconds,milliseconds. The decimal separator used is the comma, since the program was written in France. The line break used is often the CR+LF pair. Subtitles are numbered sequentially, starting at 1.

Subtitle number

Start time --> End time

Text of subtitle (one or more lines)

Blank line

SubRip .srt file example

1
00:00:06,000 --> 00:00:08,000
La rivoluzione didattica digitale è arrivata:


2
00:00:09,000 --> 00:00:13,000
Avagliano iSchool progettato e ideato da Avagliano editore.


3
00:00:15,000 --> 00:00:18,000
E' un sistema integrato di insegnamento e apprendimento


4
00:00:18,000 --> 00:00:22,000
assolutamente innovativo nel sistema di fruizione e navigazione.


5
00:00:28,000 --> 00:00:34,000
La piattaforma è sviluppata interamente con il   nuovo standard Html5


6
00:00:36,000 --> 00:00:41,000
i contenuti didattici digitali non dovranno più essere scaricati e installati sul computer


7
00:00:42,000 --> 00:00:47,000
basterà collegarsi al sistema e attraverso un software onlineappositamente studiato


8
00:00:48,000 --> 00:00:52,000
la LIM e tutti i tablet presenti in classe saranno sincronizzati


9
00:00:52,000 --> 00:00:55,000
e pronti a condividere migliaia di contenuti digitali.


10
00:01:06,000 --> 00:01:09,000
Avagliano iSchool offre pacchetti didattici completi


11
00:01:10,000 --> 00:01:14,000
per tutte le materie della scuola primaria e secondaria di primo grado


12
00:01:14,000 --> 00:01:18,000
oltre 1100 oggetti tra cui libri e quaderni digitali,


13
00:01:19,000 --> 00:01:24,000
ambienti tridimensionali, elementi multimediali quali audio e video.


14
00:01:25,000 --> 00:01:30,000
E' inoltre possibile sfruttare le infinite risorse che la rete mette a disposizione per


15
00:01:31,000 --> 00:01:37,000
integrare, modificare o creare ex novo lezioni e percorsi didattici personalizzati. 


16
00:01:41,000 --> 00:01:45,000
Il cuore del sistema di apprendimento è il Cloud di Avagliano iSchool


17
00:01:46,000 --> 00:01:51,000
per una gestione completamente online della classe e dei contenuti didattici.


18
00:01:52,000 --> 00:01:55,000
Tutti i materiali digitali sono depositati sul cloud


19
00:01:55,000 --> 00:02:00,000
e possono essere modificati e personalizzati in qualsiasi momento


20
00:02:01,000 --> 00:02:06,000
dagli insegnanti e dagli studenti, a seconda delle esigenze didattiche di ognuno.


21
00:02:07,000 --> 00:02:10,000
Le esercitazioni e i materiali prodotti in classe


22
00:02:10,000 --> 00:02:13,000
saranno salvate automaticamente in questo spazio online


23
00:02:13,000 --> 00:02:16,000
e potranno successivamente essere fruiti


24
00:02:17,000 --> 00:02:19,000
su ogni singolo tablet,


25
00:02:20,000 --> 00:02:21,000
sulla LIM,


26
00:02:22,000 --> 00:02:25,000
o su qualsiasi dispositivo fisso o mobile in ogni parte del mondo.


27
00:02:31,000 --> 00:02:38,000
Avagliano iSchool, una scuola sempreverde e al passo con i tempi.

Compatibility

The SubRip .srt file format is supported by most software video players listed in Comparison of video player software. For Windows software video players that do not support subtitle playback directly, the VSFilter DirectX filter displays SubRip and other subtitle formats. The SubRip format is supported directly by many subtitle creation/editing tools, and some hardware home media players. In August 2008, YouTube added subtitle support to its Flash video player under the "Closed Captioning" option - content producers can upload subtitles in SubRip format.

WebSRT

A format called WebSRT (Web Subtitle Resource Tracks) was as of October 2010 being specified by the Web Hypertext Application Technology Working Group for the proposed HTML5 <track> element. It shared the .srt extension and was "broadly based on" (parts of) the SubRip format, but was not fully compatible with SubRip. The prospective format was later renamed WebVTT. The main differences are:

• WebVTT's first line starts with WEBVTT
• All characters are UTF-8
• CSS is used instead of the FONT tag

Unicode support

The SubRip .srt file format supports any text encoding including ANSI, Unicode Little Endian, Unicode Big Endian, UTF-8. Byte order mark can be used to define encoding unambiguously. Further Unicode support is up to if the media player uses a Unicode font. Due to font licensing restrictions most embedded systems only support ISO-8859 fonts.

SubRip .srt file encoding tools

Software tools to encode .srt subtitle files into video containers (avi, mkv, mp4, ...):

• FFmpeg - FFmpgeg supports also the Subtitles Character Encoding Conversion
• GPAC / MP4Box
• iSubtitle (MacOS)
• XMedia Recode - XMedia Recode is a free All-In-One video- and audio converter tool for Windows.
• YAMB (works with the command line version of MP4Box, e.g. MP4Box 0.4.6 rev2698)

See also

• Comparison of video player software, subtitle ability
• Avidemux
• MicroDVD
• SubStation Alpha
• Universal Subtitle Format
• DirectVobSub is able to extract subtitles from a DVD without first extracting the files from it.

Notes

1. ^ Zuggy, DVD, November 6, 2006.
2. Zuggy, Home
3. Frogger13 (April 30, 2011). SubRip 1.50 Beta 5 (unofficial). Doom9.org.
4. Thaureaux 2007, pp. 131–134
5. Zuggy, News, entry dated May 28, 2005.
6. Thaureaux 2007, p. 132
7. Thaureaux 2007, p. 136
8. ^ Zuggy, Guide.
9. Thaureaux 2007, p. 137
10. ^ "SRT Subtitles". matroska.org. CoreCodec Inc. Retrieved 2010-08-19.
11. Xiao and Wang: p. 330.
12. 陈波, 杨涛 (2006). 实用工具软件玩家攻略. 清华大学出版社. pp. 75–76. ISBN 978-7-302-11994-4. Retrieved 2010-09-11.
13. Martin, Chris (Dec 29, 2009). "15 best subtitle tools". aboutonlinetips.com; Binary Head. All apps listed support SubRip(SRT), but the article is specific about 7 of 15.
14. Staff (September 2003). "A DivX Player for the Living Room" (Neuston Maestro DVX-1201). Review. hardwaremag.com; Singapore HWM.
15. tokig (July 13, 2003). "Review of KiSS DP-500 - Playback". nordichardware.com; Nordic Hardware.
16. Argosy Media Player HV335T HDD(HD1080p) Product page argosy.com; Argosy, 2009.
17. Cericola, Rachel (2009-12-08). Western Digital WD TV Live HD Media Player Review. bigpicturebigsound.com; Big Picture Big Sound.
18. Suerte Felipe, Carlo (February 16, 2009). Get stylish with Samsung DVD-F1080. Manila Bulletin Publications. Retrieved 2010-08-19.
19. Chisholm and May: p. 82.
20. Understanding WebSRT format
21. WebSRT, from the WHATWG HTML draft specification, retrieved 2010-10-14
22. Kennedy, Antony; de Leon, Inayaili (2011). Pro CSS for High Traffic Websites. Apress. ISBN 978-1-4302-3288-9.
23. Pfeiffer, Silvia (June 27, 2011). "Recent developments around WebVTT".

References

• Thaureaux, Thierry (2007). DivX - Copiez vos vidéos sur CD (Nouvelle édition) (in French). Herblain, FR: Editions ENI. pp. 133–136. ISBN 978-2-7460-3812-7. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help); Invalid |ref=harv (help)
• Zuggy, T.V. "SubRip home". zuggy.wz.cz. Retrieved 2010-08-19. {{cite web}}: Invalid |ref=harv (help)
• Zuggy, T.V (December 8, 2005). "SubRip 1.20/1.50b - DVD subtitles ripper". zuggy.wz.cz. Retrieved 2010-01-10. {{cite web}}: Invalid |ref=harv (help) (Software release page.)
• Zuggy, T.V (August 1, 2007). "News page". zuggy.wz.cz. Retrieved 2009-07-02. {{cite web}}: Invalid |ref=harv (help)
• Zuggy, T.V (June 17, 2005). "Guide: Ripping subtitles from video files using SubRip". zuggy.wz.cz. Retrieved 2009-07-02.
• Xiao, Han (March 27, 2009). "Constructing Parallel Corpus from Movie Subtitles". In Li, Wenjie; Mollá-Aliod, Diego (eds.). Proc. Int. Conf. on Computer Processing of Oriental Languages. Hong Kong: Springer. pp. 329–336. doi:10.1007/978-3-642-00831-3_32. Retrieved 2009-07-02. {{cite book}}: Invalid |ref=harv (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
• Chisholm, Wendy; May, Matt (2008). Universal design for Web applications. O'Reilly Media. ISBN 978-0-596-51873-8. Retrieved 2010-06-28. {{cite book}}: Invalid |ref=harv (help)CS1 maint: multiple names: authors list (link)
• Bruegmann, Ulrich (2006). Divx R.t.f.m. - Divx 6 (in German). Lulu.com. ISBN 978-1-84728-676-5. {{cite book}}: Invalid |ref=harv (help)

External links

• SubRip Home
• .SRT SubRip file format specification. Doom9.org. April 7, 2004. Derived from the SubRip source code in 2004.
• WebVTT Standard

• Subtitling
• Subtitle file formats
• Windows software
• Free television software