# PMS and MKV Header Info **URL:** \ **Category:** Feature Suggestions\ **Created:** [May 17, 2017, 3:13pm UTC](https://forums.plex.tv/t/pms-and-mkv-header-info/192300 "2017-05-17T15:13:11Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![Balthazar2k4](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/balthazar2k4/32/195988_2.png) [@Balthazar2k4](https://forums.plex.tv/u/Balthazar2k4)\ **Post date:** [May 18, 2017, 5:28pm UTC](https://forums.plex.tv/t/pms-and-mkv-header-info/192300/8 "2017-05-18T17:28:55Z")
> @NewPlaza said: > What I find confusing is I also edit the headers and do not have this issue. In fact, EVERY mkv file goes through a series of little batch files to remove all description for tracks, disable subtitles(except non-english dialogue), check video and audio tack is set, check for any other tracks. It really only takes 1 second to complete each file even on large 30GB-40GB files. > > To be honest, you may need to tell Plex to re-analyze the file or a [Plex Dance](https://forums.plex.tv/t/the-plex-dance/197064) altogether… Plex may not ever know the file has changed because of how small the header edit is. Interesting. I know that Plex respects the forced subs flag without issue. Just not sure why disabling subs isn’t working for me. I have tried re-analyzing the files, but I still get the same result. You are doing exactly what I want to do, but Plex isn’t cooperating fully. Guess I need to dig deeper into the problem. --- _[View the full topic](https://forums.plex.tv/t/pms-and-mkv-header-info/192300)._