Category Archives: Videos

Sledging through the 5th

This is, I think, wonderful.

When I first saw it, someone had appended a Spanish title, so I presumed that it was created by an artist with whom I didn’t share a language. No textual language, anyway, because this is a testament to how art can capture emotions that we all share!

It was created by Doodle Chaos.

Connecting external microphones to your Mac

If you have a USB microphone, it’s easy to plug it into your computer. But if you have an analog one, intended to be used with anything other than a computer — say, a camera, sound system or voice recorder — the chances are that it may not work, unless your computer has a dedicated microphone socket.

My Macs have a headset socket, into which you can plug combined earbud/microphone combinations such as you might get with your phone. But it tends to think that anything else you plug in there is just a pair of headphones, and that you probably want to keep using the built-in mic on the machine.

I did some experiments to work out how to persuade it to use an external microphone. It’s not one of my slickest videos, but it should serve its purpose!

Update, a few days later:

Even though the above solution works, it’s almost certainly easier, if you don’t have a microphone socket on your computer, to use a USB audio adapter, like this one.

I was hesitant about this, because I wasn’t sure of the likely quality of the analog-to-digital converters in a cheap USB peripheral, but it turns out to work very well for normal use. That would be my recommendation now, if you have a spare USB socket!

Equipment for recording lectures

One of the big challenges facing lecturers in the University here is that, for at least the next term and probably the whole academic year, all of the lectures need to be recorded. Most of the small-group teaching, practical sessions, and so forth will be going ahead — with extensive Covid-prevention measures in place — but there’s no way we can pack big lecture halls full of people in the way we’ve become accustomed to over the last few centuries, so lectures will all be delivered online this year.

One aspect of my University job recently has been to find and evaluate some of the kit people might want to use for recording, either at home, or in the meeting rooms in the department that we’re equipping for this purpose. (At home, the sitting room has been converted into a recording studio for the 21 lectures Rose needs to get on disk!)

I’ve been making videos of some of my tests and experiments, mostly for internal use, but some of them might be helpful to others. If you should be considering purchasing a USB desk-standing microphone, for example, you might be interested in one of my recordings from yesterday:

I’ve been gathering some of these into a YouTube playlist as well:

Recording Equipment for Lockdown Lectures

I’ll add more there in due course, so do subscribe to my channel if it might be of interest.

Experimenting with a Sony ZV-1 while walking around Barrington

I’ve been experimenting with a Sony ZV-1. This is a compact yet very capable camera, and if I wanted to purchase something explicitly for vlogging, this might well be it. Assuming I wanted to spend 700 quid in the process, of course.

Yesterday, I took it with me while walking the dog, and was really quite impressed. In the process, I produced a video which talks too much about a particular bit of Cambridgeshire for those who are interested in cameras, and too much about cameras for those primarily interested in walks in Cambridgeshire.

I fear the overlapping set in this Venn diagram may be rather small, but it was for my own interest more than anyone else’s; I’ll just put it here just in case there should turn out to be anyone else in that small and exclusive club of South Cambs Vlogging Dog Walkers…

(Most of the audio is recorded using an Instamic)

Look through the window!

Today’s very quick tip for improving your video calls.

This one’s pretty obvious, of course. You won’t need to be told this. But perhaps you’ll have a friend who does?

One man and his vlog

Yesterday I realised I was looking particularly suave and debonair, so decided it would be the right time to point a camera at myself. Mmm…

If you want to try using a decent digital camera for videoconferencing, you normally either need:

  • something which will capture an HDMI output signal from your camera and feed it into your computer over USB, like the Elgato Cam Link,

  • or you need some software which can capture the live preview output and make it available to your operating system as if it were a locally-connected camera. On the Mac, I do this with a combination of Camera Live – which makes it avaliable as a ‘Syphon’ server – and CamTwist, which can take a variety of inputs, including Syphon, and blend them into a ‘virtual camera’ output. There are various tutorials online on how to do this. OBS is a similar popular app, but doesn’t yet support virtual camera output on the Mac.

  • Finally, for some versions of some Mac apps, you may need to remove the app’s signature (which identifies it with a certain set of permissions), to enable it to see virtual cameras as well as physical ones. At the time of writing, Zoom needs:

$ codesign --remove-signature /Applications/zoom.us.app/

P.S. Sadly, various other people have used the phrase ‘One man and his vlog’, so I can’t pinch it on any kind of long-term basis 🙂

Gymnasium

Danny MacAskill is always entertaining. This is quite superb, and inspiring for those of us who commute by bike and get a thrill out of riding off a kerb.

An early webcam TV appearance

In October 1999, I was interviewed by Leo Laporte on ZDTV’s ‘Call for Help’ programme. Yes, this is just another interview about the Trojan Room Coffee Pot, but it’s interesting to me for several reasons.

Firstly because, even though it’s nearly 20 years ago, I’ve only just seen it! They kindly sent me a VHS tape of the episode at the time, but (no doubt with good intentions) they encoded it with a rather unusual 50Hz variety of NTSC, and I’ve never been able to play it. It was only last week that, before throwing it out, I went to the trouble of tracking down somebody who was able to tell me that, yes, indeed, there was actually something on the tape…

Secondly, it was quite a challenge to do the recording. They sent me a camera in advance, and I had a slightly older PC which didn’t have the brand new USB ports that were just starting to appear, so I had to dismantle it, install an ISA card, and then repartition my hard disk and install Windows 95, because neither the Linux nor the Windows NT operating systems I had on there were supported by 3Com’s software.

But chiefly, it’s a nice nostalgic snapshot of tech life not too long ago. The rest of the episode provides helpful hints like: you’re probably used to installing hardware in your machine before inserting the CDROM or floppy with the drivers, but with USB it’s a good idea to install the drivers first. Files you download over your modem may be compressed and you’ll need a thing called WinZip to see what’s inside them. And Chris Breen (later an editor at MacWorld), comes on to explain that if you’re trying to play DVDs on your computer and they keep skipping, it may be because you’re connected to a network that does something called DHCP. The PC can’t do that and play back smoothly at the same time, so it may be worth disabling DHCP before you start watching. Oh, and there’s also a section about how, if you have a laptop, you may find it a pain to be tethered to your modem, but there are some wireless networking options becoming available, and the one that looks most promising for the future is this thing called 802.11…

The clip I’ve uploaded shows the interview from the studio in California, with me in Cambridge, and we’re joined by Don Lekei from Canada a bit later. It’s hard now to remember just how rare it was at the time to see people on TV live from remote locations. That normally needed satellite linkups, or very costly kit attached to extremely expensive international ISDN calls. For Don and I to talk casually from the comfort of our own homes on opposite sides of the world was enough to get the hosts of a tech show pretty excited. You’ll note that we both use telephones as well, though, because there wasn’t any suitable audio channel…

Anyway, Leo is now the head of the substantial TWiT netcasting network, so I guess networked video worked out well for him too 🙂

Eyes in the back of my head

Just before Christmas, Tilly (my spaniel) and I went to the Dordogne and back in our campervan. I made a video about it, which, while it may be of interest only to travel vlog and ‘van life’ enthusiasts, does have a bit of novelty value, because I filmed it on a spherical (360-degree) camera.

This means that after you’ve watched it, you can go back and watch it again from a completely different angle and see what was happening behind you!

I’ll put the link here, rather than embedding it, because this is something you want to watch on the YouTube site. Or, better still, in the YouTube app on your tablet, or phone, or VR headset…

You can find the video here.

If I had had more time, I would have made it shorter 🙂

This was really just an experiment for me, and I learned a great deal about the challenges and opportunities of filming and editing this particular medium, which I may write about in due course.

A healthy glow

Here’s a little video selfie of me breathing. Pretty exciting stuff, eh? The reason I look so strange is that it’s taken with a thermal camera: the white and yellow areas are warm, the blue and black ones colder. I haven’t decided whether or not it’s an improvement on my normal appearance.

One reason for our interest in this at the Lab is that you can clearly see my nostrils getting cooler as I breathe in, and warmer as I breathe out. So a thermal camera is a pretty straightforward way for a computer to measure my breathing rate.

But I had some fun playing with the camera at home, too. Pointing it at my hall floor showed glowing tracks where the hot pipes run under the tiles, allowing me to see how the radiators in different rooms are connected up.

When I was looking around upstairs, I noticed some light patches on the floor and wondered what they were. It took me a moment to realise that Tilly had trotted up behind me to see what I was doing, and had silently departed, leaving only warm paw-prints behind her as evidence.

All you need is Lovie?

Last night we went into London because the kind people at the Lovie Awards, the European branch of the (rather better-known) Webby Awards, had been good enough to give me an award, mostly for the work that friends and I had done in creating the first webcam.

I was a bit embarrassed about this, partly because I didn’t think I deserved it, and partly because of the name, but I got over the latter, at least, when I discovered that it’s in honour of Ada Lovelace.

Anyway, the tradition is that you have to give a little speech containing the word ‘Love’. The other tradition, which nobody told me, is that the speech should be about 30 seconds, which is why I look a bit more flustered than usual here! I was trying, not very successfully, to edit my speech on the fly. But I got away with it because mine was the last award of the evening.

It was a great and responsive audience, which, sadly, you can’t hear on this video.

Computerphile

Sean Riley creates the Computerphile YouTube channel, which has clocked up nearly a million subscribers, and produces some great stuff, especially for the geeks among us.

I had fun talking to him about the early days of the Trojan Room Coffee Pot.

© Copyright Quentin Stafford-Fraser