Most users don't know that movies run at 23.976 FPS (NTSC) or 25 FPS (PAL). If your video file is 23.976 but the subtitle was made for 25 FPS, you will have desync. A repack converts the frame rate mathematically so the timecodes match the most common WEB-DL version circulating online.
might have had "hard-coded" errors where text was out of sync or contained typos. Improved Translation: qarib qarib singlle subtitles repack