Is there a way to get VMIX to work with multiple USB webcams at the 720 or 1080 settings? I’ve been able to get up to four webcams to work only if they are set to lower resolutions. USB 3.1 and USB-C provide more than enough bandwidth but it always gives a USB bandwidth error message when the webcams are set to higher resolutions.
Given my long-running exploration of webcams, I felt that I was especially well positioned to address this question. After all, how many people have a collection of such items readily at hand? While I answered in the comment trail on facebook, I think the info is worth sharing here as well.
Our friends a Logitech made some news recently. They introduced the C920s HD Pro Webcam. This model is a minor respin of their older C920, which was and remains, the most popular webcam in the world, despite the introduction of several new models.
What’s changed vs the older variant? Not much. The “s” in the C920s name supposedly denotes stereo microphones, which should impact almost no-one. It also has an external privacy shutter. That’s a nice thing. In the past those concerned about privacy bought one of these after-market solutions.
It’s curious to compare the C920s to the C922x Pro Stream Webcam which was introduced around 18 months ago. These two models are very similar. The major technical difference is the fact that the C922x can deliver 720p at 60 frames/second, which is potentially of interest to the game streaming crowd.
From a bundling point of view the C920s gets the external privacy shutter, while the C922x comes with a 3 month trial of XSplit.
The C922x originally included a copy of Personify’s Chromacam. I’m told that offer has been withdrawn. I tinkered with ChromaCam but found it less than useful. Such a tool trades performance for the convenience of not having to setup and light a green screen. I’ve rarely seen an acceptable result.
Xsplit now offers VCam, which is their own freestanding background removal tool.
I accept that my opinion may be harsh. It’s informed by direct experience with Ultimatte and broadcast production switchers in a past life.
The biggest change brought by the new model is the fact that it’s sold as UVC compliant. The old C920, while basically UVC compliant, by default installed a Logitech driver. That driver did not allow more than one camera to be used per computer. The XSplit team found that the Logitech driver leaned hard on the CPU, which was a problem for gamers streaming their game play.
It was trivially easy to hack Windows into treating the C920 as a generic UVC webcam. I did this so long ago I can’t even remember how. Happily, if you buy the C920s you won’t have to. The C920s will simply appear via the built-in UVC driver of your host OS.
I continued to use the 1More headset for listening to podcasts, most typically when I was walking the dogs. The means that I used them quite routinely. So, it’s worth noting that, after two-and-a-half years, they’ve reached a point where they are physically degraded to the point of not being usable. In essence, I’ve discovered their lifespan.
The insulation on the wires from the point of the Y to the individual ear buds is now seriously brittle and falling away. This happened more on the right-hand side, which has the volume control. That’s because I often listen using just that side while walking the dogs. This helps me maintain greater situational awareness, which is important when walking two large dogs on leash.
At this point, the wire from the 3.5mm plug to the Y-point is not similarly degraded. I expect this is because it has a protective covering of woven cloth.
I cannot recall another headset that was so short-lived.
I’ve been tinkering with Raspberry Pi for some while. It’s fun little platform. I’m actually awaiting the delivery of an Asus Tinker board so that I can explore the use of such an SBC that’s capable of UHD video output.
Back then, there was nothing like the Pi, so I used a Soekris Net 4801. Being Intel-based, it could run a lightweight Linux-based OS and regular Asterisk distro. I used Astlinux, which was brand new at the time.
Everything old is new again. Except me, of course.
There is no question that Newtek’s NDI is rocking the world of video production. Whether in corporate video, educational video, live streaming or low-end broadcast, it allows a transition to IP transport that’s profoundly attractive in many ways.
NDI delivers high quality video at very low latency, under one frame of video. A 1080p60 NDI stream requires at most around 150 mbps. This is ideal for production applications, which are quite separate from transmission/delivery, where lower bitrates are preferred and some seconds of delay is tolerable.
In the early days of NDI, if you needed to view an NDI signal on a monitor that required a Windows PC running NDI Studio Monitor. This is an application that can pick the stream off the network and display it on a monitor. It has some nice features, like the ability to overlay a second stream (picture-in-picture) and show audio metering.
I used this approach at Cluecon 2018, with a very small PC purchased just for the task (pictured above.)