Gaupol – Subtitle editor for text-based subtitle files

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Gaupol is an editor for text-based subtitle files. It supports multiple subtitle file formats and provides means of correcting texts and timing subtitles to match video. The user interface is designed with attention to batch processing of multiple documents and convenience of translating.

Gaupol should run on all Unix-like (GNU/Linux, *BSD, etc.) operating systems and on Windows. Technically, it should run on Mac as well, but that has not been tested nor made convenient. Gaupol's user interface is based on the GTK+ toolkit and has been designed to best fit the GNOME desktop environment.

Gaupol Features

User Interface

  • Tabbed multiple document interface that allows some amount of batch processing
  • Time and frame modes for editing
  • Line lengths optionally shown on all text elements in either ems or characters
  • Convenient for translating existing subtitles
  • GNOME HIG 2.2 compliant

Subtitle File Handling

  • Fully supported formats: MicroDVD, MPL2, MPsub, SubRip, SubViewer 2.0 and TMPlayer
  • Partially supported formats: Sub Station Alpha and Advanced Sub Station Alpha
  • Support for a wide range of character encodings, including auto-detection
  • Conversions between all supported formats, including conversion of markup tags


  • Unlimited undo and redo
  • Inserting, removing, splitting and merging subtitles
  • Find and replace, including regular expressions
  • Toggling of italics and dialogue lines
  • Changes between upper, lower, title and sentence case
  • Spell-check
  • Correction of common errors in text
  • Removal of hearing impaired text
  • Breaking lines to a defined maximum lengths
  • Capitalizing lower case texts
  • Joining or splitting words based on spell-check suggestions
  • Adapting to different CD-splits of video
  • Position shift and transformation
  • Duration lengthening or shortening
  • Framerate conversion
  • Preview in arbitrary external video player
  • Bookmarks

Install Gaupol in Ubuntu

sudo apt-get install gaupol

This will install all the required packages

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