Without a proper index, you cannot "seek" (jump to a specific time) in a video player.
: For web-based streaming (like HLS or DASH), an index file (e.g., index.m3u8 ) is often used to manage different quality levels of the MKV source. Common Commands for MKV Indexing mkv index
OBS natively writes MKV with a good index. However, if you remux to MP4 after recording, you’ll lose the MKV index anyway. Without a proper index, you cannot "seek" (jump
: It stores the start and end times for chapters, allowing users to skip between specific scenes. Managing and Repairing the Index Without a proper index
: The progress bar may be unclickable or snap back to the beginning. How to Rebuild an MKV Index