Windows server 2016 core + UCMA-WMA playback throwing exception. Missing codec?

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  I'm trying to get a UCMA application (Skype for Business application SDK) running in server core.  After making some modifications to the runtime installers, I've managed to get an app started, registered, placing, and receiving calls, but I'm running into an issue with playing back prompts.  The issue is that calling this code:

              WmaFileSource source = new WmaFileSource("0-9.wma");
              source.EndPrepareSource(source.BeginPrepareSource(MediaSourceOpenMode.Buffered, null, null));

  
  

  Throws an exception:

  Unhandled Exception: Microsoft.Rtc.Signaling.OperationFailureException: PrepareSource failed. Verify that the file is valid, has proper permissions, and can be accessed. ---> Microsoft.Rtc.Internal.Media.FileSourceException: OpenFile failed,hr=-2147467263
     at Microsoft.Rtc.Internal.Media.RtpAsyncResultNoResult.EndInvoke()
     at Microsoft.Rtc.Collaboration.AudioVideo._RtpMediaFileSource.EndOpenFile(IAsyncResult iAsyncResult)
     at Microsoft.Rtc.Collaboration.AudioVideo.WmaFileSource.EndPrepareSourceImpl(IAsyncResult ar)
     --- End of inner exception stack trace ---
     at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()
     at MCUDialoutRepro.Program.PlaceAVCall(String sipAddress) in D:\gitcode\prototypes\MCUDialoutRepro\MCUDialoutRepro\Program.cs:line 264
     at MCUDialoutRepro.Program.Main(String[] args) in D:\gitcode\prototypes\MCUDialoutRepro\MCUDialoutRepro\Program.cs:line 561

  I've verified that the file is available, accessible, and valid, and the same code works fine on a server 2016 machine with desktop experience installed.  I have the media foundation role installed, so I'm thinking that there's a missing codec for WMA.  I did try out the server essentials media pack, but that didn't appear to install. 

  I also pulled a list of dependencies on microsoft.rtc.collaboration, and found that there were a lot of missing dependencies on my server core system according to dependency walker:

  ACLUI.DLL
  AEPIC.DLL
  AVRT.DLL
  CERTCA.DLL
  COMCTL32.DLL
  COMCTL32.DLL
  COMDLG32.DLL
  COMPPKGSUP.DLL
  COREUICOMPONENTS.DLL
  CRYPTNET.DLL
  CRYPTNGC.DLL
  CRYPTUI.DLL
  DBGCORE.DLL
  DCOMP.DLL
  DEVMGR.DLL
  DFSCLI.DLL
  DMCMNUTILS.DLL
  DMPUSHPROXY.DLL
  DSREG.DLL
  EAPPCFG.DLL
  EDPUTIL.DLL
  EFSADU.DLL
  EFSCORE.DLL
  EFSWRT.DLL
  ELSCORE.DLL
  FECLIENT.DLL
  FMS.DLL
  IEADVPACK.DLL
  IEAPFLTR.DLL
  IEFRAME.DLL
  IEUI.DLL
  IMGUTIL.DLL
  INETCOMM.DLL
  IRI.DLL
  MFC42U.DLL
  MI.DLL
  MIUTILS.DLL
  MLANG.DLL
  MPRMSG.DLL
  MSFEEDS.DLL
  MSHTML.DLL
  MSI.DLL
  MSLS31.DLL
  MSOERT2.DLL
  MSVCP110_WIN.DLL
  NETAPI32.DLL
  NEWDEV.DLL
  OCCACHE.DLL
  ODBC32.DLL
  OLEDLG.DLL
  OMADMAPI.DLL
  POLICYMANAGER.DLL
  PRINTUI.DLL
  PRNTVPT.DLL
  PUIAPI.DLL
  RASAPI32.DLL
  RASMAN.DLL
  RTUTILS.DLL
  RTWORKQ.DLL
  SHDOCVW.DLL
  SLC.DLL
  TAPI32.DLL
  TBS.DLL
  TPMCOREPROVISIONING.DLL
  TWINAPI.DLL
  UIAUTOMATIONCORE.DLL
  VAULTCLI.DLL
  WEBIO.DLL
  WEBSOCKET.DLL
  WER.DLL
  WEVTAPI.DLL
  WINHTTP.DLL
  

  
  Can anyone think of what else I might be able to try to get this to work, or is this going to stay in the realm of "not supported"?  It would be nice to be able to support server core for our SFB apps (because containers eventually), but it's already starting to get pretty far off the support grid. 
  

  • Moved by BrianEhMVP Monday, July 10, 2017 8:32 PM

  Monday, July 10, 2017 8:17 PM