News items for tag webcam - Koos van den Hout

2014-08-04 IPv6 visitor stats 2014 2 years ago
Time to count IPv6 visitor percentage to different websites again:
SiteJuly 2009July 2010July 2011July 2012July 2014 my homepage 1% 2% 2% 3% 4% hcc!pcgg netwerkgroep 2% 2% 2% 3% 1% weather maps < 1% 5% 6% 7% 6% BBS files 1% 1% 1% 3% the webcam < 1% 1% < 1% 2% 2% The Virtual Bookcase < 1% 1% 1% 4% 87% Camp Wireless < 1% 1% 1% 3% 70% Weather station Utrecht Overvecht 1%
Interesting numbers. Results for The Virtual Bookcase and Camp Wireless are totally skewed thanks to some IPv6 bot constantly checking the site from constantly changing IPv6 addresses .. but without privacy extensions enabled.

Method: unique IPv6 addresses seen in the whole month / total unique addresses seen in the whole month.

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2014-05-19 (#) 3 years ago
At the moment my webcam at shows no new images: there is no outside camera location available.

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2014-02-06 (#) 3 years ago
The webcam image at is getting popular at the moment due to the use by peaking at 0.5 requests/second.

Since the image is imported from a different server in a proxying setup this was causing quite some traffic on my adsl line. The image doesn't update every second, so I had a look into caching possibilities with apache 2.2. I wanted to use the memory cache for just this one object but I started with the disk cache because it's easier to debug and see the files on disk. This didn't work, and I could not figure out why. I followed the instructions found in apache2 - Apache Reverse Caching Proxy - why isn't it caching? - but still no caching happening.

I set up a separate virtual server with the logging set to level 'debug' and found the following interesting line in the log:
[Thu Feb 06 16:24:59 2014] [debug] mod_cache.c(370): (12)Cannot allocate memory: cache: Cache provider's store_body failed!
This looked more like a memory cache problem than a disk cache problem. But the memory cache wasn't configured at all. I decided to remove the memory cache support completely and that fixed things with the disk cache. The debug log suddenly had the right messages:
[Thu Feb 06 16:25:59 2014] [debug] mod_cache.c(633): cache: Caching url: /camwindow.jpg
Now the webcam image is cached for 120 seconds. Which saves some traffic on the ADSL line.

Update 2013-02-10: Requests still going at about 0.5 requests/second at busier times. The proxy reduces the impact on ADSL traffic and ping delays.

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2012-08-03 (#) 4 years ago
Time to count IPv6 visitor percentage to different websites again:
SiteJuly 2009July 2010July 2011July 2012 my homepage 1% 2% 2% 3% weather maps < 1% 5% 6% 7% hcc!pcgg netwerkgroep 2% 2% 2% 3% BBS files 1% 1% 1% the webcam < 1% 1% < 1% 2% The Virtual Bookcase < 1% 1% 1% 4% Camp Wireless < 1% 1% 1% 3%
Interesting numbers. Websites with a more 'general' audience are now also growing this year.

Method: unique IPv6 addresses seen in the whole month / total unique addresses seen in the whole month.

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2012-04-13 (#) 5 years ago
Fresh cloudy skies on It's back, someone was kind enough to lend me some room in his window giving a nice view in a north-easterly direction.

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2010-08-03 (#) 6 years ago
There is an interesting relation between 'website with technical subject' and 'visitors with IPv6'. I counted the number of unique addresses of visitors via IPv6 to several websites I run for the month of July 2010 and found the following percentages: Comparing it to July 2009 (percentages between parentheses) does show growth.

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2010-03-08 (#) 7 years ago
Interesting weather this morning: snow started between 7 and 8, and it was nearly melted away again before 11. Overview on Uithof archive Monday 8 March 2010.

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2010-02-24 (#) 7 years ago
I just noticed something: the archive of in the Uithof in Utrecht now covers a longer period (now 3 years and approximately 3 months) than the archive of at the Beneluxlaan in Utrecht (which stopped just a bit over 2 years). How time flies.

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2009-07-08 (#) 8 years ago
Het is een regenachtige dag vandaag, maar de neerslagradar van het KNMI heeft momenteel geen data, en is maar naar de backup-methode overgeschakeld, zo te zien duitse radar. Op de webcam zijn de buien te zien die voorbij trekken.

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2009-05-25 (#) 8 years ago
Ik zag van het weekend dat er weer een duif zit te broeden in de conifeer voor het raam van onze werkkamer. Het leek me wel leuk om tijdelijk een uitbreiding te maken voor mijn webcam site zodat iedereen het nest kan volgen zoals Vogelbescherming Nederland ook doet met hun Beleef de lente project. Helaas, geen werkende extra webcam beschikbaar. De extra webcam op het werk geeft rare usb errors en weigert.

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2009-05-04 (#) 8 years ago
It seems the painters of the building were either very sloppy or aspiring vandals, they painted over the window right in front of my webcam on 7 April 2009. So I moved the webcam a bit.

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2008-11-24 (#) 8 years ago
First winter weather of this season: it snowed in large parts of the Netherlands yesterday. As a result the number of visitors to quadrupled. Most interesting new link to this webcam I found was an Italian site about the Netherlands where I think they describe it as a view of a palace. No, it's just a university building.

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2008-09-08 (#) 8 years ago
2008 09 08: regen Pouring rain this morning... the most interesting weather sensor at home would be a rain sensor, which is planned in the self-powering weather station.

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2008-03-25 (#) 9 years ago
Today is one of those if you don't like the weather, wait five minutes days. I have seen snow, hail and sun in the last thirty minutes and rain will probably happen too soon. The webcam shows interesting cloud views and the temperatures at home are dropping due to the snow on the roof.

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2007-10-30 (#) 9 years ago
I upgraded to Apache 2.2.x at home so now, and other sites at home can all be reached on IPv6 addresses. One downside: logresolve (the postprocessing apache log resolver) has absolutely no idea about IPv6 addresses.

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2007-01-22 (#) 10 years ago
For a while I had the webcam running from work pointing at a moderately nice view from the Kruyt gebouw pointing at the construction work for the new 'FE' building of the Hogeschool Utrecht. Since I used my standard webcam-scripts, there is a full archive, now online: Archive of webcam pictures from when the cam was in the Kruyt building. Enjoy, or something. I like this one: 8 am morning fog in October.

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2006-08-25 (#) 10 years ago
Moving at work to a new office with all the associated network reconnection problems, things getting lost and other issues. And a new view for my webcam.

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2006-08-15 (#) 10 years ago
My webcam is back generating fresh images. Still people visit it, so I might as well give them something to look at.

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2006-08-08 (#) 10 years ago
While transplanting the Coffeecam to new hardware I made a copy of the entire system to a different (more silent) harddisk. The next problem was getting grub to install itself on that second harddisk. Which was easy, given the hints on a Software RAID Howto. Grub does not complain when I tell it /dev/hdc will be the future (hd0). This is something that would be a lot more trouble to get right in lilo.

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Other webprojects: Camp Wireless, wireless Internet access at campsites, The Virtual Bookcase, book reviews, Weather maps