I've seen this problem a few times on google with various solutions none of which worked for me.
My setup is as following;
PMS: 1.1.4.2757-24ffd60
Linux 3.2.0-4-amd64 (#1 SMP Debian 3.2.60-1+deb7u3)
Clients:
Plex Web Windows (Chrome) 2.8.1
Plex for LG (NetCast) 2.6.9
I have 247Gb free on the drive PMS is installed on and 412Gb free on the drive the media is stored on, mounted as a separate drive on the same machine.
I've tried changing the Direct Play and Direct Stream settings with no effect as well as pass through of audio.
All my files are stored as mkv and range from 1Gb to 30Gb with Permissions set to 664, I've also tried setting the owner of the file to plex.
Anything else I can try?
Thanks