: Ensure the subtitle file is set to 23.976 fps to match the BluRay source.
The specific file name you mentioned, Zombie.Holocaust.1980.1080p.BluRay.x264 , usually refers to high-definition releases from boutique labels like or 88 Films . subtitle Zombie.Holocaust.1980.1080p.BluRay.x26...
: Because this is a BluRay rip, look for subtitle files (.srt) labeled specifically for "BluRay" or "BRRip." Subtitles timed for DVD releases will likely drift out of sync due to the difference in frame rates (23.976 fps for BluRay vs. 25/29.97 fps for DVD). About the Film : Ensure the subtitle file is set to 23