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Dicaffeine: Using a Raspberry Pi 4 to Display an NDI Stream

The past couple of years I made a lot of use of an NDI-based video-over-IP strategy in producing the live stream and archival sessions for Cluecon in 2018 & 2019. One of the things involved in that production was displaying an NDI stream, produced in vMix, to a pair of local projectors.

Given budget constraints, I opted to use a pair of SFF Windows PCs running Newtek’s NDI Studio Monitor. I selected some used Lenovo M73 Tiny, which cost me about $200 each on Ebay. With an i5-4570 CPU and Intel HD Graphics 4600, they did the job well enough, each delivering 1080p30 to its associated projector without issue.

Lenovo M73 Tiny

Given additional budget, I’d have opted for BirdDog Mini NDI adapters over the little PC’s. These little FPGA-based devices can be set to decode or encode. Also, they can be powered over Ethernet, giving added flexibility, but at a cost of $500 each.

At the time, there was no way to decode NDI on an device with an ARM CPU, like the Raspberry Pi. That has recently changed. Dicaffeine is a new NDI player for Raspberry Pi. The basic version is free and I’ve been tinkering with it for a couple of weeks.

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It seems that webcams are important after all

For quite a few years I’ve believed that webcams are an important tool in the arsenal of personal communications. I’ve also wondered openly when they would evolve beyond a relatively simplistic state. For example, it took a long time for a USB 3 connected webcam to arrive.

This morning my wife was researching webcams for some of her staff. While she has a long history in broadcast production, she’s currently a public relations and corporate communications professional. Her staff are fielding requests from TV stations seeking to do remote interviews using tools like Skype, Zoom, Webex, etc.

Logitech Streamcam frontal

Since they have existing desktops, they don’t have built-in webcams. She was looking for webcams to add to these existing computers. Off the top of my head I recommended Logitech’s latest, which is known as the StreamCam.

Introduced in February of this year, the StreamCam is a brand new product. Unlike the Brio 4K webcam, reviewed here a while back, it’s USB 3.1 Type-C connected, delivering 1080p60. It’s likely a better solution than Brio 4K for most people.

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About Speakerphone Quality

A short while back, over in the VoIP forum on DSL Reports, long-time participant Stewart asked a question that seemed like it was written for me. Of course, I answered. The matter is related to one of my most favorite posts: Can You Hear Me Now? Headset vs Speakerphone In The Home Office.

With a little reflection, I realized that I didn’t want this discussion to simply fade away, so I’m adding a copy here.

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