IP Video from Mobile Devices to Laptop.

*For Steve and Helen

Guide 1.1

Getting a video and audio stream from the camera and mic on a mobile device to a computer, on a local wi-fi network.

*difficulty - Beginner really (It is that easy!)


This guide will use software from NewTek. The software is currently free, but I believe it may not remain free following this month: www.newtek.com


Preparation. Make sure all the devices you want to use here are on the same Wi-Fi network.

1. Go to the app store and install this app, NDI HX Camera on your Apple mobile devices.
2. Open the app. Touch the NDI button at the bottom of the screen. When it is solid blue it is broadcasting an AV feed to the network.
3. On your MacBook, go to https://ndi.tv/tools/. Install all the tools that are available for your operating system.
4. Once installed, open the Newtek NDI Video Monitor. It'll be a blank screen to start with.
5. In that app click File on the toolbar, you'll see the name of the phone that was set up first (and still broadcasting?) with the NDI Camera. Click in until you get to [NDI HX Camera] for that device - select that.
6. Bingo! You now have a wicked HD spy camera! ;) Also, if you have the mobile device with you whilst doing this, you may want to mute the speakers on your laptop as you'll be hearing a lot of feedback probably (headphones will avoid this problem).

There are versions of the apps for Microsoft operating systems. I think the camera app is Apple only. I highly recommend getting this software on as many devices as possible in the event it ceases to be a free resource.

*I was going to do pictures and everything... but they would have just been candy and not necessary as you'll discover.

UPDATE: Also install the NDI HX Capture IOS app on phones and iPad. This is like the Camera app but broadcasts the screen of your device (i.e. what you see). Super useful!

The next guide will be taking the feed(s) and broadcasting to somewhere useful on the internet.

James

Little things I have seen recently that I want...

First up:

A Big Keys keyboard. As a colleague said... I was drawn to this like a moth to a flame! ;)
This looks ace for a tech box. It's actually designed as a high viz keyboard for visually impaired people. Colourful with extra large keys. I'd say ideal for techies too.

Next up:

Go Button. An app that has been bought by Figure 53, the makers of QLab. I shared it on Facebook and it's picked up a lot of likes and a few shares as I pitched it at my choreographer and dancer friends that I feel could really do with it. This app runs on IOS and gives you the ability to use tracks you have on your phone in a cue stack. With fades and times and other bits and pieces that would let you build a show in rehearsals. Or even use for a live event.

Eek, well it looks like I was full of empty promises... promising to be more regular on this blog.
I've recently helped a colleague get going on one so I think I may have the will again.
Been very busy over the last few years. I'm still at my job, I still freelance.
At DC today I finally completed the replacement of all the MR16 halogen spot lights  with LED. I'm fairly chuffed with this, hence the post.
This is a pic of the last one going in. I've used Simply LED's NxtGen sources. Seem robust, but above all they have a nice colour and really useful wide beam angle.

Exif data

Must remember to remove the exif data, or change it in some of the photos I give to people. This is because Facebook seems to want to automatically use the copyright in the description and so my web address is being published.
Not that this is a bad thing... more that it has caught me unawares and it currently points here... so you can see that I'm a little out of date!
Maybe this is a kick I need to get this blog running again?
Lets see...

Blimey.. not again!

Sorry, not neglecting you. Just I've been boring myself recently and didn't want to inflict it on you.
Interesting post coming up over the weekend.. promise! :o)

RCF ART 322A attention

You remember this post where I found out where the awful smell and not a lot of noise was coming from? Well the spare parts eventually came (note to self, try to avoid Italian kit.. getting burned too often by it!).
So here I thought, just gotta pop this in and away we go again. Erm, no.
Well the new driver went in well enough, unfortunately when hooked up to a signal not a lot came out. Bugger!
Here I was in two minds. This came from the perceived closed boxed'ness of an active speaker - you'd think it was more complicated than an outboard amp for some reason?
On the one hand I just wanted to pass the problem on to someone else.
And on the other there was no way I wanted to pay SLX to just look at it for £70 to find that it was an easy fix or totally knackered.
Naturally I got my screwdriver out. This is what I saw and did:

RCF ART 322A - Backplate

 1. Just take out the slightly larger screws from the backplate housing

2. Prise the guts out and lay somewhere handy and then unscrew the little screws from the zinc plated covering that goes around 3 sides. Remove this cover leaving the back plate, centre electronics, an end support and heat sink.

RCF ART 322A - amp hanging out

RCF ART 322A - not a lot to see here!

3. Now, there aren't many 'user serviceable parts' inside here but there are quite obviously two fuses!



I took a look at these... hummmm there appears to be an airgap inside them. Sweet, could this be it?

RCF ART 322A - see the fuses? They are it for user serviceable.

4. So pop em out and wander round to the stores to get replacements... F4A... knickers, everything but... ok then Maplin next... Ah, everything but. Ho humm. Fine, CPC for next day, everything but too... blimey these fuses are weirdly rare?
Ah, of cause, Italian... they wouldn't consider it good design if you could order parts easily!! Anyway... RS came up with the goods.
£1.17 for 10 fuses inc postage... Awesome. They came today.. got stuffed straight in... and... Woop... firing on both drivers again :)

I'm glad I at least looked at - let alone fixed this speaker as when you have little bits of knowledge like this in your arsenal you can really save someones day, not to mention wallet! :)

Mind: I was still flabbergasted at how little there was inside the amp considering it is a 450+W amp. Goes to show how much of a general purpose amp is wasted because it has to cover a lot of uses.

There is this game we play...

And hopefully he will be man enough to admit that he looked at this page and so I will have passed it on in a much more interesting way than that in which I came by being IT for a while.

Oh, and I promise I'll post properly again soon... got some nice pics of the inside of an RCF ART speaker coming up next, if I fix it!

Yesterday's Trouble!

Wilo Pumps in the DC plant room

So yesterday morning I was woken up by a phone call from Dance City's AD with email server problems. We tried sorting it over the VPN but in the end a local hard reset was what was required.
But I couldn't avoid coming in as he also informed me that the plant had shut down due to a leak and so there was no heat... worse still was that the janitor was about to have a go fixing it!!
I arrived to find leaks from the 3 of the 4 sets of Wilo  pumps you can see, but with most water coming from an expansion joint. I isolated this, the on call engineer from Integral fixed it later.
I spend more time in this room than I feel I want to... and why does the plant always break down when the operations manager is away.

Gel/colour/filter...

Call it what you want - I just know I detest sorting it.

DC Crossover store

So it is certainly a job I hate... and it's what probably makes me miss my assistants the most. No matter how hard I try, the store where it's all kept always looks like a bomb has gone off in it when I'm left to my own devices.

On the upside: I have found a load of colours I had no idea we had
On the downside: no idea where I just filed them! :/

So, that's where the burning smell was coming from!

RCF Art 322A bass driver - burned out!

Andy pointed out to me that there was a problem with one of our monitors at DC, an RCF Art 322A.
My ears had been blocked up with a cold so I wouldn't have been able to tell... but I had noticed the smell... just hadn't thought about it!

Here is what I found inside the cabinet! Oh well... only £189 +vat and delivery for a replacement!!!

Anyone knows who makes these drivers, I'd be happy with an OEM if it were half the price.

Next consideration is to put some limiting on the system it's used in... I've been trusting the users not to overdrive the speakers... 1st mistake!! ;)