Subtitle Edit is a free (open source) editor for video subtitles - a subtitle editor. With Subtitle Edit you can easily adjust a subtitle if it is out of sync with the video and much more. Create/adjust/sync/translate subtitle lines, Convert between SubRib, MicroDVD, Substation Alpha, SAMI, youtube sbv, and many more. Un can use Auto Translation via Google translate or Microsoft Bing Translate.
Subtitle Edit can open subtitles embedded inside matroska files.