Subtitle Composer is an open source text-based subtitle editor that supports basic and advanced editing operations.

Features

• Open/Save Text Subtitle Formats - SubRip/SRT, MicroDVD, SSA/ASS, MPlayer, TMPlayer and YouTube captions
• Open/OCR Graphics Subtitle Formats - VobSub (.idx/.sub/.rar), BluRay/PGS (*.sup), formats supported by ffmpeg (DVD/Vob, DVB, XSUB, HDMV-PGS)
• Demux Graphics/Text Subtitle Stream from video file - SRT, SSA/ASS, MOV text, MicroDVD, DVD/Vob, DVB, XSUB, HDMV-PGS
• Speech recognition from audio/video file using PocketSphinx
• Smart language/text encoding** detection
• Live preview of subtitles in integrated video player w/ audio stream selection
• Preview/editing of subtitles on graphical audio waveform w/ audio stream selection
• Sync by dragging several anchors/graftpoints and stretching timeline
• Time shifting and scaling, lines duration re-calculation, framerate conversion, etc.
• Joining and splitting of subtitle files
• Side by side subtitle translations
• Text styles (italic, bold, underline, stroke, color)
• Spell checking
• Detection of timing errors in subtitles
• Scripting (JavaScript, Python, Ruby and other languages supported by Kross).