Index ^new^ — Mkv

| Error Message | Cause | Solution | |----------------|---------|----------| | "Invalid Cues" | Index references a byte offset outside file bounds | Remux with mkvmerge --cues 0 to rebuild cues from scratch | | "No seek head found" | Index completely missing | mkvmerge without any --cues flag; it will create a default index | | "Index is huge (over 10% of file)" | Too many cue points (e.g., every frame in 4-hour video) | Remux with --cues 5s to reduce density | | "Seek works but audio goes out of sync" | Cues point to video clusters but not audio clusters | Remux and let mkvmerge recalculate all track positions |