Szervusz!

MPlayer szerintem tud ilyet alapból (bővebben itt: http://www.mplayerhq.hu/DOCS/HTML-single/hu/MPlayer.html#subosd)

Vagy Ubuntu csomagkezelőjében is találhatsz több programot erre a célre, pl.:

” Gaupol Subtitle Editor
subtitle editor for text-based subtitle files 
Text-based subtitles are commonly used with DivX video. Gaupol supports multiple subtitle file formats and provides means of text corrections and time manipulations. Gaupol’s user interface is designed with attention to batch processing of multiple documents and convenient translating.
Supported formats are:
• Advanced Sub Station Alpha (.ssa)
• MicroDVD (.sub)
• MPL2 (.txt)
• MPsub (.sub)
• SubRip (.srt)
• Sub Station Alpha (.ssa)
• SubViewer2 (.sub)
• TMPlayer (.txt)
VobSubs (image-based subtitles used in DVDs) are NOT supported.
Homepage: http://home.gna.org/gaupol/ „