Pixel Streaming Freeze with high resolution

Hi there,

I’m using pixel streaming with Unreal 5 and has a tough problem. The streaming in my browser will freeze if I jump to other apps and then jump back:

When I move the cursor in the streaming, the image in the browser does not change but the image in exe file does change. And this status could keep longer when the screen resolution goes higher. It could be over 10 seconds with 4K.

I have searched the app.js of signaling server, there is a freezeFrame but is turned off by default.

Everything is deployed in local server . The Engine and Signaling server are both version 5.1.

Anyone has any ideas how this could happen?

Thanks a lot in advance!

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Hmm, have you considered background lag that is usually in applications today? One possible explanation for the freezing could be related to the browser’s resource allocation. When you switch to another application, your browser may be allocating more resources to the other application, which could cause pixel streaming to slow down or freeze. Similarly, higher screen resolutions can put additional strain on your system, which could also impact performance.

Another possible explanation is network latency. If your network connection is slow or unstable, this could cause delays or freezing when streaming graphics from Unreal Engine 5 to your browser.

I suggest you download Chrome, Firefox, and another browser to try on them all to see if it is the application, browser or network connection.

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Hi EliasWick,

Thank you so much for the response!

For the browser’s resource allocation, I tried to watch a 4K video online and there’s no such problem.

The network shall not be the reason since everything is in local server, including the signaling server.

And I have tried various browser and the problem does not change.

I’m wondering if this would be some internal limitation of pixel streaming or the limitation of encoder/decoder?

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Hmm, I can tell you that I don’t know or have a definitive answer. I suggest looking around the subject to perhaps learn more. I understand it may be difficult as it is hard to look for an answer in something you are not familiar with fully…

Do you experience issues when streaming in less than 4K?

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Exactly. It’s the first time that we are required to play pixel streaming with 4K. If we lower the resolution to 3K or 2K, it will still freeze but the freezing time would be shorter. And there’s no freezing or maybe we cannot feel it with 1080P

And here’s another situation: Once there’s something moving in the viewport, such as car, the view will not freeze. But if there’s nothing moving in the view, it will freeze. The audio will never freeze.

same problem in 5.1, is there any solution?