Author: tom

Speeding up and reducing resolution of videos

Sometimes it is necessary to speed up videos and/or reduce the resolution. This will typically result in a much smaller file size. ffmpeg and avconv allow video file manipulation on the command line.

These commands work on Debian, and will likely work on Ubuntu and other Linux distributions.

Speed up video, 2× speed:…

Implementing IPv6 Privacy Extensions (RFC4941)

IPv6 auto configuration on Linux will normally assign the same address every time when connecting to a specific network. This address would normally be formed from the network prefix and local interface MAC address. When using IPv4 your identity is slightly masqued by NAT. Although your single public IP address may be tracked, it is

Iperf – multicast IPv4

Using Iperf version 2.0.9 on Debian (Stretch) it’s possible to test networks using a multicast connection.

On the receiving end execute the command: iperf -s -u -B 239.1.1.10 -i 1

On the sending end execute the command: iperf -c 239.1.1.10 -u -T 3 -t 10 -i 1 -b 100M

This will run a bandwidth test using UDP…

Slovenia

Unlike one of my typical tours, where I would travel along a roughly planned route spanning a few thousand kilometers, I am basing myself this summer in the touristic town of Bled for six nights and making tours from there as well as doing a bit of hiking and cycling around the area.

New Purchase

As a 40th birthday present to myself, I am now the proud owner of a new BMW F850GS. It comes complete with pannier boxes and a top case, and tyres suitable for gravel roads. I will not write a review of the bike, as I’m hardly an expert but with over 50% more power than

Time to say goodbye to the Transalp

After 11 years and having toured through 29 countries, the Honda Transalp 700V, the first bike I bought new, has been sold and is on the way to a new life in Poland. I could not resist one final short tour into the Black Forest, and to take some video shots with the drone. A