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A Windows Media player using C# and WPF. Designed for media playback at Kingdom Halls in situations where JW Library - the recommended player - is unable to be used (e.g. 3rd-party images). The emphasis is on ease-of-use above advanced function. Please report any problems in the Project Issues section.

Main Window

System Requirements

  • Windows 10
  • .NET 5 x86 or later
  • 4GB RAM
  • 250MB Hard disk space


If you just want to install the application, please download the OnlyMSetup.exe file (there is also a portable version if you'd prefer to just copy a folder). If you choose the portable version, you may also need to download and install the Microsoft .NET 5.0 Desktop runtime (x86) from here.


See the wiki for basic instructions and for information on where to get further help.


Use the Discussions area to ask for help, etc. Please limit discussions to those of a technical nature.

License, etc

OnlyM is Copyright © 2018, 2021 Antony Corbett and other contributors under the MIT license. The FFMpeg libraries are used under the GNU General Public License version 3 (a copy of which is in the FFMpeg folder). AutoMapper (Jimmy Bogard et al) is used under the MIT License. Unosquare FFME is used under the Microsoft public license. MaterialDesign themes (James Willock, Mulholland Software and Contributors) is used under the MIT license. TagLib.Sharp (Brian Nickel, Gabriel Burt, et al) is used under the GNU Lesser General Public License version 2.1. Serilog is used under the Apache License Version 2.0, January 2004. WPF Extended Toolkit Community Edition (Xceed) is used under the Micrsoft Public Licence. NAudio (Mark Heath) is used under the Microsoft Public License.