Proclaim - video playback performance over NDI?

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Kevin Menzel | Forum Activity | Posted: Wed, Mar 31 2021 8:20 AM

Hello, 

I'm experiencing some slight performance issues - exclusively when playing back videos - over NDI from Proclaim to OBS. Slides, announcements, anything static is working fine.

When playing a video, the NDI input into OBS gets a bit choppy. The playback both in Proclaim itself, and on the projector output, is perfectly fine. OBS is on a second computer, which is also doing camera mixing.

We were running Proclaim on an older system, and when video was playing, the CPU was spiking. We recently upgraded, and though the CPU is under considerably more load when streaming video over NDI than slides, it was not spiking anymore. Should mention that this is Windows 10, fully patched, latest version, with all the latest drivers. NVIDIA 1650 graphics card.

I was wondering if others were having similar issues with their Proclaim -> NDI -> OBS setups, and if there might be any tips people might have in terms of improving performance to get a smooth video stream between computers (if this is something that anyone else is doing).

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MJ. Smith | Forum Activity | Replied: Sun, Apr 4 2021 2:49 PM

bump for visibiliity 6

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David Thomas | Forum Activity | Replied: Thu, Apr 8 2021 9:09 AM

Kevin Menzel:
We were running Proclaim on an older system, and when video was playing, the CPU was spiking. Should mention that this is Windows 10, fully patched, latest version, with all the latest drivers. NVIDIA 1650 graphics card.
re

Having a similar issue to your OLD configuration. We are not using a second computer. We suspect that the video card supporting 3-displays in Proclaim (desktop, House & Confidence) plus OBS mixing is overloading the GPU so that it is overflowing to CPU processes. Would appreciate any recommendations from others on reliable Graphics Card (how much graphic memory?) for Win10 PC running 3 displays plus OBS.

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Chris Martin | Forum Activity | Replied: Sun, Apr 11 2021 8:53 PM

We are also experiencing what may be a related issue. We have a livestream computer running vMix, not OBS, and noticed in the last week or so that the video feed was getting choppy (lots of digital noise). We intake 2 NDI feeds from video cameras (PTZOptics) and 2 NDI feeds from Proclaim (a full slide and a lower third feed). We noticed tonight that when receiving the feeds from the two cameras alone, we were using about 12MBps of network bandwidth (6 per camera, as expected) and the image was clear and stable. When we added the Proclaim feeds that jumped to 380MBps with spikes up to 450 and the choppiness reappeared. It seems that Proclaim is sending extremely high bandwidth NDI feeds that are overwhelming our livestream computer.

Has there been a change to the bandwidth of NDI feeds from Proclaim recently?

Is there a setting to cap it?

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Jordan Sjodin | Forum Activity | Replied: Tue, Apr 13 2021 11:40 AM

We haven’t changed anything with the bandwidth/quality. But it could be what we are doing is too much for some machines. 

thanks everyone for the various info. We are investigating this more now

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Posts 1
Eric Newswanger | Forum Activity | Replied: Fri, Apr 30 2021 2:00 PM

Jordan, 

Is there an update on this or any way we can turn the quality settings up for NDI outputs?  I've recently switched from a physical interface to NDI with Proclaim to increase flexibility with video switching and I have definitely noticed a difference in smooth playback.  It seems like random frames get dropped.  The system that Proclaim and vMix are running on is not maxed out by a long way.

Having said that, I really thankful NDI as it is something I have used in our production for the last 5 years.  

Thank You

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Jordan Sjodin | Forum Activity | Replied: Fri, Apr 30 2021 2:30 PM

No updates yet, but providing settings for NDI to help adjust it to suit your needs/hardware is on this list! Thanks for chiming in.

Eric Newswanger:

Having said that, I really thankful NDI as it is something I have used in our production for the last 5 years.  

Glad to hear it!

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Posts 51
Andy Bleach | Forum Activity | Replied: Mon, Jul 5 2021 5:22 AM

Hi I've also noticed choppy video on NDI output from proclaim. We run proclaim on a new Mac which is not overloading. Having control over the NDI data rate would be very handy. You can control the NDI output data rate from vmix so mimicking how vmix do this would be great.

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Jordan Sjodin | Forum Activity | Replied: Fri, Jul 16 2021 2:00 PM

Hey all, we shipped some updates recently. one is a new 'low bandwidth' option that you can check in the Display settings within Proclaim (Display > hit the gear on the custom output). This uses a similar scaling factor we have seen in other apps and greatly improves performance (lower cpu pressure. Lower bandwidth usage on the network)

We have also streamlined some of the code on Windows which further improves NDI and SDI performance.

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