# PLEX-Update breaks MKV-Playback? **URL:** \ **Category:** General Discussions\ **Created:** [February 24, 2017, 2:55pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511 "2017-02-24T14:55:19Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [February 24, 2017, 2:55pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/1 "2017-02-24T14:55:19Z")
The last PLEX-Pass-Update (1.4.2.3400) breaks the playback of mkv-files on my PMS. I have it running in a VM of El Capitan, files stored on a NAS (Synology). Everything was working just fine, till the update. example: I can not play movie “xy.mkv” with the latest update (1.4.2.3400), but when I revert PLEX to Version “1.3.4.3285”, the exact same file plays again, without any problems … For now I keep automatic update-download disabled. \*\*\* problem solved! latest 1.5.x Update fixed the issue for me \*\*\* ---
**Author:** ![Peter\_W](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/peter_w/32/6556_2.png) [@Peter\_W](https://forums.plex.tv/u/Peter_W)\ **Post date:** [February 24, 2017, 4:37pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/2 "2017-02-24T16:37:52Z")
Not heard of that issue before. Any particular client that causes it or is it all clients? Is it transcoding on the affending client or not? Please also - [https://support.plex.tv/hc/en-us/articles/201643703-Reporting-issues-with-Plex-Media-Server](https://support.plex.tv/hc/en-us/articles/201643703-Reporting-issues-with-Plex-Media-Server) - follow those instructions after a reboot + recreating the issue. ---
**Author:** ![Westlam](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/westlam/32/87280_2.png) [@Westlam](https://forums.plex.tv/u/Westlam)\ **Post date:** [February 24, 2017, 6:48pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/3 "2017-02-24T18:48:49Z")
I’m having same issue. I have a synology and a Windows PMS running latest version and the Windows PMS say’s it’s unavailable while the Synology will play it after a longer than normal loading time. Both are accessing the same files. ---
**Author:** ![barney007](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/barney007/32/9090_2.png) [@barney007](https://forums.plex.tv/u/barney007)\ **Post date:** [February 24, 2017, 8:14pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/4 "2017-02-24T20:14:08Z")
I am not having the problem. I am running it on osx. All my stuff is mkv and I have seen 3 people playing mkv ---
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [February 24, 2017, 10:28pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/5 "2017-02-24T22:28:22Z")
Well, I tried to play different mkv’s after updating to the latest PLEX-PASS (v 1.4.2.3400), some would just not play anymore … The error said “es konnte keine playback-sitzung für diesen Titel erstellt werden (No playback session could be created for this title)” and something about wrong Metadata(?). But once I reverted PLEX to the previous version (v 1.3.4.3285), the exact same mkv’s that threw errors before played flawlessly … I tried to play the files remotely via AppleTV(newest version), iPad, Computer. And locally over the Web-Interface. Same results everywhere. I am using PLEX for like 6 years now & never had this issue before either. Luckily I can just revert my OS-X System to a previous snapshot & have it working again. But of course I prefer being able to update without PLEX stopping to work. ---
**Author:** ![Peter\_W](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/peter_w/32/6556_2.png) [@Peter\_W](https://forums.plex.tv/u/Peter_W)\ **Post date:** [February 25, 2017, 9:20am UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/6 "2017-02-25T09:20:23Z")
Yes, for sure, I would also prefer if you (and Westlam) would be able to update and play MKV files as it has worked before. Sadly, I can’t do much without logs capturing the failed play attempt. What I can tell is that it is all Mac-stuff so I might not be the best suited to solve this but I’ll find someone who is if that should be the case. Since it is Mac, I know it does not support MKV and will have to at least remux, so the transcoder sort-of comes into play at the minimum. Logs would show more. ---
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [February 25, 2017, 10:54am UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/7 "2017-02-25T10:54:18Z")
well thanks Peter, I’m gonna wait for the next update, try again & then send logs before reverting to the working version of PLEX, if this bug keeps occurring. ---
**Author:** ![mdnitoil](https://avatars.discourse-cdn.com/v4/letter/m/f07891/32.png) [@mdnitoil](https://forums.plex.tv/u/mdnitoil)\ **Post date:** [February 25, 2017, 2:13pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/8 "2017-02-25T14:13:47Z")
I think part of the problem here is that MKV is just a wrapper, so saying some MKV’s play while other don’t is a little misleading. For what it’s worth, I keep all my files in that format, usually h.264 4.1 video, but a range of audio compressions. Between the 2 servers I run, there were 3 separate streams going last night. Two of them to Ipads and the third transcoded to the older Sony app. No playback issues for us. ---
**Author:** ![markstubb](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/markstubb/32/144306_2.png) [@markstubb](https://forums.plex.tv/u/markstubb)\ **Post date:** [February 25, 2017, 11:14pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/9 "2017-02-25T23:14:45Z")
same issue here. playback of an mkv works fine on 1.3.4.3285 but not on 1.4.2.3400. 1.3.4 is the version i upgraded to 1.4.2, so i just rolled back to it on my qnap. Here’s the particular movie i was having issues with ---
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [May 3, 2017, 6:49pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/10 "2017-05-03T18:49:49Z")
Running Plex Version 1.5.5.3634 now, and the MKV-issues are gone. 🙂 ---
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [August 18, 2017, 12:15am UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/11 "2017-08-18T00:15:52Z")
Issue is back again :# ---
**Author:** ![tiki-plex](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tiki-plex/32/1929_2.png) [@tiki-plex](https://forums.plex.tv/u/tiki-plex)\ **Post date:** [October 4, 2017, 9:21pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/12 "2017-10-04T21:21:34Z")
and issue is back again PLEX version 1.9.2.4285. just can’t be possible, that i need to change all the mkv’s with handbrake … hope the next update will fix it again … ---
**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\ **Post date:** [January 7, 2020, 10:49pm UTC](https://forums.plex.tv/t/plex-update-breaks-mkv-playback/181511/13 "2020-01-07T22:49:13Z")