Videomaker Reviews the NewTek NDI HX-PTZ1 Camera

Not long ago I openly admitted that I wear the rants in the family. This goes along those lines. It was inspired by the Chris Monlux’s review of the NewTek NDI HX-PTZ1 Camera published January 14th by Videomaker Magazine. I found this review to be deeply disappointing, and I’d like to tell you why.

First, take the time to read their review. I’ll wait. And you need the context.

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NDI-to-HDMI on the cheap?

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.

ClueCon NDI Feed on Monitor

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.)

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How-To: Using an RTSP Stream as a Source for a WebRTC application

This post arises from a question posed by someone via Quora. I’m not all that engaged with that Q&A platform, but this question seemed novel, so I offered an answer. I thought the answer worth sharing in a little more depth, so I offer it here as well.

The question was, “How can I use the RTSP stream from an IP camera as a source for a WebRTC application?”

There are two parts to solving this puzzle; (1) Connect to the RTSP stream and (2) Make it appear like a webcam to the client application.

Obvious Answer: vMix

At the outset, let me say that I would address this using vMix. vMix solves both parts of the puzzle handily. If this is all that you needed to achieve, the $60 Basic HD license would suffice.

Of course, you’d need to learn a little about the application, which is deep. To my mind it’s fun, but some might find it daunting. Further, vMix requires a considerable host platform. You’re not going to run it on trivial hardware.

Let’s just say that we’d like to solve the problem with less spending and requiring less knowledge overhead.

Less Obvious Answer: VLC & NDI Tools

VLC is the ubiquitous, open source media player. Available on all platforms it can play anything I’ve every wanted to open. Beyond files, it can open network streams. I’ve used it to listen to my local PBS radio station. I’ve also used it to watch video streams from our Grandstream surveillance cameras, as shown below.

VLS viewing RTSP stream

NDI stands for Network Device Interface. It’s a network protocol, developed by Newtek of TriCaster and Video Toaster fame, that allows low-latency, lightly compressed video to be passed over a gigabit Ethernet network. NDI is impressive, but I won’t wax poetic about that here.

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Observations of the vMix 17 Public Beta

Last week saw the release of the vMix Fun Time Live Show for March which was punctuated by the public release of a beta preview of vMix 17. The official release of vMix is being timed to coincide with the annual NAB Convention, which is April 16-21 in Las Vegas.

In the middle of 2015 vMix replaced Wirecast as my preferred desktop video production software. vMix is effectively a production switcher. It allows me to combine various audio and video sources in real-time, the results being sent to a Hangout-On-Air or recorded to disk. It handles webcams, graphics, animations, video capture cards, live desktop capture and even PowerPoint files with ease. Further, it does so while being less hardware intensive than its competition.

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