Mkv | Index

That map is the , officially called the Cues element (or Cueing Data ) in the MKV structure.

mkvinfo your_video.mkv Look for a section labeled Cues . If it’s missing or very small relative to file size, your index is likely incomplete. mkv index

You’ve downloaded a pristine MKV movie file. You double-click to play it. The player opens, the audio starts flawlessly, but the video is frozen on the first frame. Or worse—you can’t seek forward at all. Dragging the timeline slider does nothing. That map is the , officially called the