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Wirecast 12.0: Sources Frequently Freeze when Multi-Viewer is Enabled

I am running Wirecast 12.0 with 2 PTZOptics NDI cameras.  I have one monitor set up for control and switching, one set up to monitor the live output and one with multiple windows to show my various sources as well as my live and preview feeds. 

I officially ran the system during our morning worship service for the first time this past Sunday.  During the service, the two camera sources froze repeatedly so that the video was static in wirecast.  I think the control from the PTZOptics IP controller still worked, however.  Rebooting the cameras would bring everything back online for a short time. 

Lastly, I closed the multiviewer monitor that displayed my various sources and the sources no longer froze.  I checked the computer processor speed when the sources froze and everything seems to be running well. 

 The computer system I am using is new and meets or exceeds the specifications given by Wirecast.

Does anyone have an idea of what the issue might be? 

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  • Gerry Poston said:
    Does anyone have an idea of what the issue might be? 

     Multi-Viewer is heavily GPU dependent. So you'd need to test for that.

    Gerry Poston said:
    have one monitor set up for control and switching, one set up to monitor the live output and one with multiple windows to show my various sources as well as my live and preview feeds.

     Which means your GPU is running three monitors. Perhaps your GPU is stressed.

    Gerry Poston said:
    Lastly, I closed the multiviewer monitor that displayed my various sources and the sources no longer froze.  I checked the computer processor speed when the sources froze and everything seems to be running well. 

     This may indicate your GPU is also involved in decoding the IP cameras. Or it may well be coincidental. You'd have to test for that.

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  • CraigS Thanks Craig! I’ll take a look and see if that was is the issue. I ran the task manager on Sunday when the problems occurred and don’t remember any issues with the GPU but not sure that I specifically looked at that. 

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  • Gerry Poston You may want to post your complete config and system specs. Perhaps Multi-Viewer and IP cameras are coincidental and one may not really impact the other and it's something else happening concurrently.

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  • I ran the system again yesterday and am still having the video feed from the cameras freeze up occasionally.  Rebooting the cameras and restarting wirecast temporarily fixes the issue but then it happens again some time later.  I have one display that shows all of my sources and I left that display turned off, but that didn't seem to help. 

    For reference, here is my system configuration:

    HP Computer (Attached) running Wirecast 12

    2 PTZOptics cameras (1 NDI 30X and 1 NDI 20X)

    PTZOptics IP Super Controller

    2 Monitors:  2 HPer 23 inch displays,

    1 hdmi output to several TV displays within the church

    Multiviewer configured to show main screen on 1st monitor (HPer 23"), live feed on second monitor (HDMI Output to several other TV displays within the church), and 10 panel viewer on third monitor) (HPer 23")

    1 remote computer that displays song words, etc on a projector screen (accessed through desktop presenter)

    All networked through a TPLink TL-SG1016PE network switch and hardwired to the internet

    Computer Specs attached

    Things I have tried: 

    Turning off multiviewer 10 panel display) and associated monitor

    PTZOptics technician remoted in to my computer and configured the cameras

    Local computer company came in and configured my network

    Checked the GPU status during the issues yesterday and its running around 35 to 40%

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  •  One additional bit of configuration information:  I am streaming to facebook live as well.

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  • Gerry Poston said:
    I have one display that shows all of my sources and I left that display turned off, but that didn't seem to help

     So it may not be Multi-Viewer then if I understand you.
     

    It's possible the monitoring is completely coincidental to the issue.

    Reset Wirecast Preferences. Wirecast > Help > Send Support Information but select lower left Reset Preferences.
    Use only one monitor (remove the others from the computer entirely).
    Create a new document using only the two IP cameras and only do a local recording.

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  • I did as you suggested above and ran the system last night for about an hour and a half. I didn’t experience any video freezing issues and everything seemed to work some better. There was a noticeable difference of the video lagging behind the audio. My audio comes straight off of my mixer used in the sanctuary. Should I have to delay the audio coming in or should the video be coming in faster?  Why should I try next?

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  • Gerry Poston said:
    here was a noticeable difference of the video lagging behind the audio.

     That's not too unusual which is why we have the option for video or audio delay per source. Basically different types of sources can have decode latency and also different signal paths can also result in one timing different than another. 
    In Wirecast you delay the video and audio of each source individually. It can take a bit of testing to get them lined up. The control ranges from seconds to thousands of a second so there's flexibility best on the needs and types of sources.

      

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  • thanks Craig,  I can give that a try. Based on these most recent results, what do you think might have been causing the video feed to freeze?  I was using new blue titles as well as streaming to FB when it occurred before. Maybe one of those is hanging up something in the software?  

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  • Gerry Poston NewBlue might be using significant GPU resources which might have affected things. Some users are recommending they run Titler Live on a separate computer and use NDI into Wirecast. Of course one needs a second computer to do that.

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  • CraigS Thanks!  I’ll try it without new blue and see what happens.  

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  • Gerry Poston You're welcome of course. Let us know.

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  • Good morning Craig,

    This Sunday, I utilized the test program that you had me set up a week or so ago.  So, I ran just my two PTZ Optics NDI cameras as I did last Wednesday.  However, I added a desktop presenter shot from another computer and instead of recording locally, I streamed to Facebook.  I also added back both extra monitors.  One, I only used for viewing the task manager for the computer and the audio mixer of wirecast.  The other I used to monitor the live feed out to our dvd recorder and our choir monitor system (single multiviewer output). 

    Just before the service, as in other recent services, the camera sources in Wirecast froze.  When the cameras did freeze, I noticed the video displayed in wirecast began to skip for a couple of minutes and then froze totally.  Rebooting the cameras fixed the issue and I experienced no other freezing issues during the service.    However, video in the viewer within the camera settings (logging directly into the cameras using IE) seemed to be displaying properly. 

    I checked the GPU condition throughout the service, and especially during the freezing and task manager showed low GPU useage on all three graphics cards.  Most was on my main screen and it only showed an average of maybe 35% usage.

    Another thing I noticed is that my camera controls seemed sluggish.  I am using an external IP controller on the same network as the cameras and computer.  There is always a distinct delay in video getting to Wirecast, so I think that the issue might be that more in the display running behind instead of the actual control itself.  I need to test this further to be sure. 

    I did delay the audio by .5 seconds as you had previously suggested.  This helped the facebook feed some, but doesn't seem to affect the actual video shown in wirecast.  Should I see a difference in wirecast when adjusting the Audio delay?

     

    Thanks for your continued help!

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  • Gerry Poston Keep in mind the display in Wirecast might be conserving display resources. if the stream is good it means Wirecast is handling everything as it should.

    Since rebooting the cameras fixed the issue, perhaps something is impacting the cameras specifically. Is there anything else on the network that might be impacting things. 

    You mention Desktop Presenter. If you grabbing locally you should be using Wirecast Screen Capture. Desktop Presenter should only be used for sources coming from another computer on the network. Even in those circumstances, Newtek NDI Scan Converter may be a better choice as it's newer more efficient technology.

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  • CraigS I am using desktop presenter to pull video from another computer on the network. Even though I had it shown as a source, I didn’t actually use it yesterday. Also, I haven’t had an issue with it freezing as of yet. I am also looking to see if there might be something else on the network that might be causing the cameras to drop but so far, haven’t seen anything.  since it seems that the cameras are displaying correctly in the camera’s login screen, I am assuming it’s on the computer side of the system for now.  

    So, if I am understanding you correctly, the on screen monitors in wirecast might show a video delay?  Also, delaying the audio as discussed before will or will not have an effect on the wirecast displays?

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  • Gerry Poston If the delay is necessary it impacts the entire signal chain since the delay is on input.

    You may want to try NewTek NDI Tools NDI Scan Converter as an alternative to Desktop Presenter. Its impact on the network might be less of an issue. 

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  • Gerry Poston said:
    I am assuming it’s on the computer side of the system for now.  

     You may want to check the cameras in VLC Player since Wirecast uses similar technology.

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