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Are there any open source, command line, subtitle converters - preferably for Linux?

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3 Answers

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The open source program Subtitle Edit has a command line converter and is available for both Windows and Linux.

Syntax: SubtitleEdit /convert "pattern" "name-of-format-without-spaces"

Example 1: SubtitleEdit /convert sub1.srt sami
Result: Will convert sub1.srt to sub1.sub to SAMI format

Example 2: SubtitleEdit /convert *.srt adobeencore
Result: Will convert all .srt files to Adobe Encore format

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The GUI works, but I got an error when running from the command line.. .I needed to install libmono-winforms for the GUI to work (as stated in the README)... Maybe there is something extra which is needed for the CLI to work... I get an AttachConsole... error. using Ubuntu 10.04 ... – Peter.O Jan 6 at 23:12
This seems to be fixed in version 3.2.3 - at least on Ubuntu – Johanz Jan 15 at 10:29
@Johanz: Thanks. Version 3.2.3 works. It converted a .ass to SubRip (.srt) ... Just one thing I notieced: it produces \r\n (CRLF) line endings, even when the source line-ending is \n ... but that would rarely be a problem and is easily fixed with sed if need be. – Peter.O Jan 27 at 17:09
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Subtitles perl swiss army knife (scroll to the end of the page).

Here you can find more options.

Also, mplayer/mencoder has some dumpXXXsub options, which might work. I never tried this, but reading the man, it should work. Example:

-dumpmpsub (MPlayer only)
              Convert the given subtitle (specified with the -sub option) to MPlayer's subtitle format, MPsub.  Creates a dump.mpsub file in the current directory.
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Indeed this is handy, sadly though only three different formats are supported; .srt, .sub, .smi. – Johnas Mar 9 '10 at 15:31
I checked the Mplayer and Mencoder out. Didnt get it working though. And it supports only SRT, SMI, SUB and JACO. A good suggestion though, thanks. – Johnas Mar 9 '10 at 16:27
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What is it you want to convert exactly? If it is between subtitle formats then it depends on which formats you are talking about. Those which are bitmap based will require OCR to convert to text format and generally always require user input for confirming the accuracy of the OCR

If it is all text formats then Jubler or Aegisub may be of use

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Simple text subtitles. SRT, STL, SUB, PAC. Back and forth. – Johnas Mar 9 '10 at 15:24
@johnas - my answer updated with a couple of possibilities – Shevek Mar 9 '10 at 16:06
Thanks Shevek, but none of the above was command line operational. Though they would've been perfect if I could use the GUI. – Johnas Mar 9 '10 at 16:20
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