Jubler is a tool for editing text-based subtitles. It can be used an an authoring software for new subtitles or as a tool to convert, transform, correct, and refine existing subtitles. Some of its key features are subtitle preview, smooth cooperation with MPlayer, full subtitle editing, and ASpell support.
MPlayer uses threads to properly handle the out and error streams. The code was updated to the latest ffmpeg library. Correct MIME type under Linux is supported.
URL: Jubler subtitle editor