A couple months back I started having a problem on all of my machines running EMBY Theater when attemping to play MP4 content. The problem is the MP4 content, no matter the application that created it frequently pauses or freezes making the content unwatchable. The same content plays back just fine on the same PC's using the Edge browser and also plays back just fine on other devices such as our iOS, Android, and Fire Cube devices.
The EMBY Theater machines are all Windows 10 Pro with nothing else installed on them. Some are completely fresh installs, others have been running for years. Hardware ranges from hex core Xeon to various i7 and i5 configurations. GPU's are either nVidia or Intel. The sever is dedicated and is more than ample for the task at hand. I tend not to think this is hardware related since the same machines playback the same content flawlessly when playing thru a browser. EMBY Theater plays back other content types just fine, such as MKV.
I've ensured both the server and the EMBY Theater clients are always running the latest EMBY software. So far none of the updates that have come have helped the problem. I also keep up with Microsoft updates on all of the machines.
I have not yet tried converting the MP4's to other content types as there simply too many MP4 videos to make it practical.
Thank you for your help and consideration.