PTZOptics NDI Latency

Is anyone out there successfully using PTZOptics NDI camera and Wirecast on a MAC?  I just purchased the NDI key for my SDI PTZOptics camera.   I'm new to PTZOptics and NDI.   But I did have hopes for all the joys that NDI is advertised to bring.  Hopes are falling flat right now.

I'm getting 300 ms + of latency when I first capture the PTZOptics NDI camera with Wirecast.  Then that latency increases by around 3 MS every minute that the camera is connected to Wirecast.  For example, after 10 hours I'm seeing over two seconds of latency.

NDI Video Monitor with the PTZOptics NDI camera is consistently under 200 ms of latency regardless of how long the test runs.

When I use the NDI Cam app on my iPhone into either Wirecast or NDI Video Monitor the latency is consistently under 200 ms regardless of how long the test runs.

A new and clean user was created for my iMac.  Preferences on Wirecast have been reset.  The latest version of MAC OSX, Wirecast, NDI Tools and PTZOptics firmware have been installed.  Every variety of settings I could come up with have been tested.  PTZOptics NDI into Wirecast remains un-usable with its latency increasing by the minute.  I've contacted PTZOptics support and they tell me that if their camera is working with NDI Video Monitor then there isn't much they can do. 

Surely someone out there has solved this riddle?


My System Info

  • OSX 10.14.6 (18G2022)
  • Wirecast Version: 10.14.6 (18G2022)
  • Computer Model and CPU type:

    Model Name: iMac

      Model Identifier: iMac14,2

      Processor Name: Intel Core i7

      Processor Speed: 3.5 GHz

      Number of Processors: 1

      Total Number of Cores: 4

      L2 Cache (per Core): 256 KB

      L3 Cache: 8 MB

      Hyper-Threading Technology: Enabled

      Memory: 24 GB

      Boot ROM Version:

      SMC Version (system): 2.15f7

      Serial Number (system): DHXN105YFQPP

      Hardware UUID: 135DB7F6-73A1-59CD-B3DA-5E1C73A441CA

  • Input sources of the video: PTZOptics NDI (V63C_F16.HI_V6.2.79_24M_20190815) 
  • Complete hardware setup used for streaming: PTZOptics NDI 30X to a Netgear GS108PP switch to the 27 inch iMac listed above.  The router is from Xfinity.  Also tried my Netgear router with the same results.
  • Server and/or CDN name: N/A . The latency with Wirecast on my iMac.
  • Wirecast preference settings:  Preference file has been restored to factory settings.
  • Wirecast Canvas size: 1280x720@30 fps or 1280x720@60 fps or 1920x1080@30 fps or 1920x1080@60
  • Streaming and Recording encoder settings: Not streaming or recording 
  • Wirecast Output Statistics:  22% CPU usage
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