@mjgraves
Would be great if vmix brings in the 4K that you can scale down to emulate pan a zoom shots with merge transitions in 1080 and 720 projects.

Keep us posted when you do the tests, as this would make a great stationary camera option.

-s

I had a briefing from Logitech last week. They report that when operating at 1080p or 720p the digital zoomed video is very good, the result of staying near 1:1 sensor pixel to output size. Don't expect PTZ control, or any kind of PTZ emulation.

In a discussion with a friend who is a telecom pundit, he revealed that the camera is capable of MJPEG. That's key to getting 4K over USB 3.

There's some hope that it might have 4:2:2 sampling and not 4:2:0.

Even at 5 gbps, 4K uncompressed is a lot of pixels. 8.8 mpixels in fact.

Yesterday I discussed this camera with a friend who is a serious video conferencing/UC pundit.

https://talkingpointz.com/logi-brio-4k-webcam/

Logitech today advised that they've sent me a sample to evaluate. the notes the sent have confirmed that it delivers 4K30 using MJPEG to pass the USB 3 link.

Had to turn the volume down cuz he's kinda annoying. It would have been nice had he mentioned how he was recording the video.

I've found that my older i5 laptop can record 4K30 to disk. But that's about it. No streaming at the same time.

Compared to the C920 or C930e the Brio does a much better job with high contrast scenes. My office has two terrace doors that let in a ton of sunlight. The Bria handles that without turning into white smudges the way the older models do.

It needs a really fast PC to do it justice, but so far it looks like the best webcam that's ever been offered.

I will eventually do a more complete review, but in order to do it justice I've ordered a new desktop. My old one simply can deliver 1080p or higher.

I should say that one of the reasons I switched from Wirecast to vMix was the fact that vMix is so much more efficient in the use of hardware resources. I probably got another year from my old desktop by switching to vMix.

I purchased the Brio (received today), and upgraded to the vMix 4k recently. FYI, I can't get it to input anything higher than 1080 in vMix.

In the input settings, I set the zoom to 5, and the image quality compared to the full zoom of the c930e for comparison, was much better than the c930e. Much sharper image.

I did find I preferred the 1080 29.97fps over the 1080 59.94, as the higher frame rate caused more stuttering of the video.
Backwards, I know, but this is on an old ASUS p6T deluxe v2 with a xeon x5680 hex core processor with hyper-threading, 18GB memory, and a GTX 970 GFX card.

I'm outputting vMix @ 1080p, with an Amcrest PTZ camera input @1080, The Brio @ 1080, The C930e @ 1080, a C920 @ 1080, and a lifecam studio @ 1080. Render time is 7-8ms with activity in all cameras, and the vMix CPU is topping out at 21%.

The Brio is an excellent replacement for one of my c270 webcams, but a bit pricey for not being able to access the full resolution.

One thing I noticed is it's closeup resolution is outstanding. I took a wine cork to within 3 inches of the brio, and it's text was very sharp, unlike the c930e.

and did you inout the camera in a usb3 port? thats required for 4k to work.

To be clear, I have a Dedicated 4 port USB3 PCIe interface in which all my webcams are connected.
https://www.amazon.com/H...mp;keywords=usb3+rocket.

As for controlling the frame rate, I was not aware this could be done outside the presets while setting up the inputs.
I always configure as 29.97, or 59.94. On occasion I have also configured as film 24 FPS.

Of the Brio, The C920, and the C930e, I rank image quality as follows.

Brio, best
C930e next best after tweaking configuration to smooth video
C920 Easier to configure than the C930e, but image isn't as good as c930e IMO.

Refer back to this post...
https://forums.vmix.com/....aspx?g=posts&t=3645

I have been able to use Brio at 4k30 with zero latency. It only supports MJPEG at 4K.

It taxes my old laptop, which is running the vMix trial. The license on my production vMix system doesn't support 4k.

I'm awaiting the arrival of a new production system to more fully explore what Brio can do.

The improved handling of highlights & lowlights is worth the price, even at 720p or 1080p.

On my new desktop the Logitech Brio runs fine. It must be connected to a USB 3.0 port to achieve 4k30. It's better to not use a USB 3.0 hub or extender.

If I also have the C922 webcam connected the Logitech Camera Settings app does not find the Brio. With out that app available you lose control of the digital PTZ, color settings, field of view, etc. It does retain the last known settings.

If the Logitech Camera Settings app is running (and shows a preview of the cameras's stream) you cannot add Brio to your vMix project. vMix complains that the system is resource deprived. Close the Settings app and vMix can get the stream from the camera.

Thereafter, open the Settings app and you will NOT see the camera preview, but you will have live PTZ control from the Settings app. PTZ control from vMix does not work.

Also, after loading their utility for Windows Hello I can log into my vMix machine by simply letting the camera see my face.

The image quality is good, but not spectacular. The detail is good but it's a bit noisy.

I noticed this as well. vMix seems to take some time when it must down sample the webcam stream. If you set the Brio to the same resolution as the project you won't see that lag.

In cases where real-time performance is critical, like video conferencing, this will make it impractical to use different portions of a 4K wide shot as various, different, lower-resolution scenes.

I'd be curious to know the process by which vMix does such down sampling. It seems that it's a circuitous path, or perhaps involves some buffering.