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EW7: Powerpoint does not work through NDI after black screen

Today in the service i found a bug/error which I could reproduce:


  • In EW7 the Output is set to NDI
  • In the schedule I have a simple powerpoint with 6 slides
  • Before I select the powerpoint, I set the screen to black (Ctrl-B)
  • Then I double click on the powerpoint and the first slide is selected.
  • At the right time in the service I end Black screen with Ctrl-B so that the Powerpoint is shown
  • The first slide of the Powerpoint is shown in The Live view in EW7 and on NDI 
  • Now the error begins: When i select the next Powerpoint Slide it shows in Live View but in NDI the first slide stays on: NDI does not refresh when i change the slide in EW7.

As a solution i quick selected a song and after that selected teh powerpoint again and after that it worked just fine: Changing a slide in the powerpoint resulted in Live View and NDI change.

In summary: When the screen is black (Ctrl-B) and I select a Powerpoint --> Turn off black screen --> selecting next slides works in Live View in EW but fails over NDI: The first slide stays on in NDI.

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Additional information:

  • Laptop Lenovo Legion 5 17ACH6H 82JY
    AMD Ryzen7 5800H
    Nvidia 3060RTX
    16GB RAM
    SSD 512 GB & Win10
  • NDI from EW7 --> (a) OBS and (b) NDI Studio monitor for the beamer
  • MS Office 2019

Can anyone give some feedback on the error i found?

I am having the same issue. Power point through the alternate display as an ndi output only show a black screen.

What build number of EW are you running? This should be fixed in the newest build. 7.3.0.13

Hi Dan, I am running the latest version 7.3.0.13. Here is the funning thing. I'm running a trial version of the same build on my home PC and it works fine. I do have a newer video card for the church PC, to assist with stream encoding not to try and resolve this issue. If that does help I'll reply here that it did. For reference, the current video card in the church PC is a AMD HD 5700 and will be moving to a GTX 950.

ok, yeah, let us know if the video card fixes the issue.

Changing out the graphics card did not help. It will display presentations built in EasyWorship but not powerpoint presentations. I only shows a black screen

So here's the full breakdown. I am running the latest version of obs. Along with version 5 of ndi along with the latest version of the obs-ndi plugin. I have now a GTX 950 graphics card running the latest NVIDIA drivers. When I initially put the card in it displayed the PowerPoint in one test. From then on it no longer does so. It will display every other output ie: songs, scriptures, even YouTube videos using the registry key workaround. Previously to the graphics card upgrade it wouldn't play YouTube videos even with the workaround. So that's an improvement. For transparency sake, here's the way I have the ndi software and the OBS ndi plug-in installed. If you install the obs-ndi plugin it gives you the option of installing version 4 of the ndi software which I declined so sad it would use the version 5 of ndi to ensure that there was no conflict how to plug in trying to use the old version. We have 3 physical monitor outputs running at 1080p. One control monitor 1, 1 projector Sanctuary monitor and a single TV on the back wall that is now the fold back monitor.

Try following the steps in the article from the link below to set the video card use for EW and PPT and see if that does anything. 


PPT black through NDI



Already saw that document. It only applies to computers with switchable graphics. This computer does not. 

I saw that document already and it only applies to computers with switchable graphics. This one does not. 

i met same problem.

in my chruch computer, using gpu gt730, sending ppt through ndi alternate screen show blank in obs

but in my home computer, using gpu gtx950, work fine


so my solution is install ndi application, and turn on ndi screen capture in easyworship computer

and the obs computer capture 2nd monitor / live screen of the easyworship computer.


also i notice that if the computer cannot sending ppt through ndi alternate output

ndi screen capture hx also will now working, because hx using hardware decoder, but the non hx using software decoder

This is not a bug. Your video card the GT 730 is not powerful enough.  To use the NDI you need to really have a video card that is in the recommend not the minimum. 


gt730 in easyworship work fine with song, and play video 4k, sending to alternate ouput 1080p ndi.

and for powerpoint work fine if using ndi screen capture.

tested and already running regullary in my church.

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