Holger Kinkelin

Dockerizing Stuff for Fun and Profit

When I want to play with $things, I mostly use virtual machines as throw-away systems that I can mess up with odd software I don’t want to install on my Mac or that simply does not run on it. A good while ago I looked into docker as a more lightweight and flexible alternative to a VM. However, I put docker aside as it wasn’t usable on a Mac at all.

FFMPEG vs My 'Go Low' Action Cam

I got myself a really cheap action cam. Think “China copy” and “Go Pro” and you know what I bought. However, for its 35 EUR price tag that thing is pretty cool. One problem with that cam is that it comes without any software. So you need to dig around a bit if you want to get creative with recorded movies and pictures. So far, I tried two things: time lapse videos from a sequence of photos and stabilized videos.

Testing Guetzli - Google's Perceptual Image Encoder

… a quick test of the Guetzli JPEG encoder published some weeks ago by Google. To my big surprise, you cannot encode TIFF or another lossless image format into JPEG. You need to export your RAW camera file first to JPEG @ 100% quality. Then you encode that file with Guetzli. Seems a tad odd to me, as you have a lossless compression two times. The speed of Guetzli is furthermore quite disappointing.

Using Two Different GitHub Accounts on the same Computer

Some days ago I created next to my private GitHub account another one for work. At first I was a bit confused how to authenticate to two different GitHub accounts. The solution is rather simple as my former colleague R. H. told me. At first, you need to create two different SSH keys id_rsa_work and id_rsa_priv. Of cause you can use your already existing SSH key for one of the GitHub accounts.

How to Display a Featured Photo on a Hugo-Powered Photo Blog's Front Page

I use the static website generator Hugo for this homepage. However I find that Hugo’s capabilities are somehow restrained if you post a lot of photographs like I do.

So far my approach has been to automatically generate markdown that includes the photos I want to show in a post chronologically. Furthermore I enforce that only the first photo is shown on the homepage with the switch. So my typical post looks like this: