Here are my findings.

Caveats

These are not Google Glasses. These are £15 DVR Sunglasses. They are cheap and nasty and don't look anything like the futuristic Google Glasses. They record VGA quality video and have a mono microphone suitable for picking up close range sounds. There's no visual feedback.

I popped out one of the lenses to make it look everso slightly more like Google Glass.

Recognition

Several people in the bar asked if I was wearing Google Glasses - for an as-yet unlaunched product, there are plenty of people who know about them. In swinging London, at least.

I walked down Oxford Street to get some cash - there are a few moments when people seem to recognise that I'm not wearing a normal piece of eyewear.

The video should give you a good idea of some of the pitfalls of life logging - not to mention the tediousness of always on recording.

I'm A Creep

From playing back the footage, I spend a huge amount of time staring at breast and arses. Am I a lecherous old creep? Well, only partly. Because the glasses have a fixed camera, the record whatever my nose is pointed at - not where my eyes are looking. My head is facing forward but my eyes are pointing left - I'm looking at you but recording what's ahead of me.

So, if you were to pick out the worst moments of my video, you'd see me oggling a collection of bums (male and female) and checking out a swathe of chests (again, male & female).

Just like President Obama.

More than embarrassing, it also means you don't capture what you are actually looking at. Unless the lens has an incredibly wide field of view, you're going to miss out on a whole lot.

That's my story, and I'm sticking to it!

Eye Contact

Amazed by how @edent’s low-rent Google Glass-alike affects conversations. Even eye contact fails. Glass is doomed. Archived Source

Initially, people stared at the glasses rather than me. That was quite disconcerting. As the evening wore on, the glasses faded into the background and people seemed to get a lot more comfortable with them. It's quite easy to forget that you are recording - or that you are being recorded. Which leads to...

Don't Record That Please

Tom Scott & I were having a chat, when suddenly he let slip one of his frequent rants about how David Cameron was born in Kenya (or something). He immediately realised he was being recorded and asked for me to edit out the last few seconds of footage. Naturally I sold his bizarre and spiteful theories to the tabloid press in the hope of ousting him from his throne as King of the Interwebs.

We quickly came up with a universal gesture which means "please delete the last 10 seconds of recording."

I’ve invented a ‘scissors’ gesture for “cut what I just said out of your lifelog”. It might have another meaning Archived Source

The scissors is fairly recognisable to both humans and computers. The "snip snip" meaning "to cut out" is fairly unambiguous and rarely conflicts with any other common gesture. It also has added significance in the UK.

Other people just seemed to forget that I was recording. Within a few moments they were bitching about their jobs, spouses, health - all the usual things that friends grouse about. They are reliant on my continuing friendship to keep those conversations private. That's a really uncomfortable feeling. I don't want people to be friendly to me because they're afraid I might post to YouTube a video of them talking about how much they hate their boss.

In a way, we've always had this problem. But before it was restricted to "he said she said" - now there's evidence.

Low Light, High Volume

Some of the most awkward social situations - and some of my fondest memories - happen in darkly lit bars with thunking music. I've no idea how well the real Google Glasses will perform, but it's likely they'll be overwhelmed by the noise and - unless they include infrared lighting - be practically useless in low light situations.

Towards the end of the evening, Shoe Blogger Sabrina Johnson - came up to me to ask if I was really wearing Google Glasses. Here's the only barely usable piece of video.

Final Thoughts

I've experimented with perhaps the least interesting - but most controversial - aspect of Google Glass. We already have the ability to record our daily lives, but a cheap pair of Video Sunglasses make the process a lot more subtle - and virtually effortless.

One of my favourite sci-fi books is "The Light of Other Days"

It explores, in part, what would happen if we could see into the past. Imagine if you could rewind to any point in your personal history and rewatch old arguments. If you could see whether you really were as funny as you thought. If you could add up how much time you spent playing Tetris.

Watching back my drunken escapades was, ironically, a sobering experience. I thought I had a good time last night, but it appears I spent much of the evening queuing for drinks, looking at my phone, or trapped in conversation with a bore. My inebriated wit isn't quite up to the standard of Oscar Wilde.

I've trapped my memories on silicon wafers. Not just my memories - but slices of other people's lives as well. Those recordings are now my hostages - and I don't know how that makes me feel.

File Sizes

The glasses, it turns out, record in 1.1GB chunks. If you really want to know the details, the videos are

1,231,771,216 bytes
1,233,678,696 bytes

Each file is 30 minutes and 1 second long. Annoyingly, there is a gap between the videos of roughly 10 seconds.

My calculations from earlier were incorrect - an 8GB card is enough to hold just shy of 4 hours of video.

Compressing

I'm hosting the video on archive.org. One of their services is to re-encode the video into a web-friendly format. What's quite stunning (to me) is the inefficiency of the MJPEG codec which the glasses use.

The change in quality is negligible - as you can see from the demo.

I wonder how much more expensive the glasses would be if they recorded in an efficient format like Ogg Video? Obviously, there would be battery life considerations - but being able to record 10 times as much video on a single memory card is a big gain.

Another demo

This is using flash, however, Archive.org also offer HTML5 video which I'll be moving to after #NaBloPoMo has finished.

I wondered if anyone was selling them second-hand on eBay. They weren't. But there were a whole load of clones. "Spy Sunglasses DVR" and the like. Some were technically very impressive - bluetooth, mp3 players, fm radios - all built in.

I went for the cheapest pair I could find. 1280x960 video resolution (actually 640x480 - more on that later), no built in memory, and shipped from Hong Kong.

Total cost? £16.50. A damned site cheaper than the Immortal glasses - but would they be any good? After two weeks on a slow boat from the East, they finally arrived...

So, how well do they work?

Test Videos

Sunshine Test

Walking down Brick Lane in the dark

The video glasses I purchased said that they recorded at 1280x960 - in fact, they're only half that at 640x480. The seller has agreed a partial refund. I'm not convinced that the 1280 version would be any more than interpolated upwards.

Test Pictures

The resolution of the pics is 3264*2448. Click the pictures for full size.

The Specs (geddit?)

• Weight: 52g
• Battery:5V DC 450mAh
• Recharging Time: 3-6 hours
• Continuous working Time: 2-3 hours
• Picture Resolution: The rather odd 3264*2448.
• Video details (based on usage, not manufacturer's details)
• Video 640*480
• Audio is driven by a mono microphone on the left side.
• Mplayer says: VIDEO: [MJPG] 640x480 24bpp 29.710 fps 5479.8 kbps (668.9 kbyte/s)
• Mplayer says: AUDIO: 24000 Hz, 1 ch, u8, 192.0 kbit/100.00%

Once plugged in to USB, the camera just shows up as a USB mass storage drive. No software needed. Works perfectly on Linux.

lsusb produced

05e1:0b02 Syntek Semiconductor Co., Ltd

The Down Side

Look, it's a piece of sweatshop produced plastic. Don't expect the world, ok? That said, there are a few minor niggles.

• Mini USB rather than Micro USB. All of my gadgets use the new standard - I have plenty of mini cables, but it's a pain that this doesn't support the new standard.
• Limited to 8GB MicroSD card. To be fair, that's ~2 hours of recording time - which is what the battery is rated at.
• The lenses of the sunglasses seem to be smoked glass and don't offer any real UV protection.
• The lenses are meant to be removable (I've got a clear pair of lenses coming) but I can't find any way to remove them.
• Glasses are lightweight but feel quite fragile.
• Glasses are a little tight for my big head.
• The mono microphone picks up what the wearer is saying reasonably well - but other sounds can be quite muffled. I think this is because the mic is pointing downwards.

All that said, I'm reasonably impressed with them.

Setting The Time

One of the problems with buying cheap tat from China is that the instructions are... obtuse.  As you can see in the above videos and pictures, I managed to screw up the time initially.

To set the time correctly, create a file called "time.txt" in the root directory. Open it up in your favourite text editor and type the time using this format.

2010.11.05 13.45.30 Y

That's "YYYY.MM.DD HH.MM.SS" The "Y" at the end tells the camera to place a timestamp on every video and picture. If you don't want a timestamp, write it as

2010.11.05 13.45.30 N

Once the file is saved and the camera turned on, the time will be set and the file automatically deleted.

Comparisons

Comparing the video to the hyper-expensive Looxcie

And the Immortal

I think this generic set holds up very well.

Conclusion

Under twenty quid? Bargain! It certainly falls in to the "good enough" category.