iljitsch.com

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Hi, I'm Iljitsch van Beijnum. Here on iljitsch.com I publish articles and post links about a range of topics.

Also have a look at my business web site inet⁶ consult.

Skyline #17, everyone-loves-sunsets edition

Image link - posted 2022-10-28 in

My new e-book: Internet Routing with BGP

The book will be released the week of 17 November and it can be pre-ordered now from Apple Books in 51 countries and Amazon Kindle world-wide for US$ 9.99 / EUR 9.99.

Click the link for more details.

Full article / permalink - posted 2022-10-27

An accordion made of two Commodore 64s plays Scott Joplin ragtime

In an infinite universe, everything that's possible does in fact exist. I've long held the position that the internet is pretty much an infinite universe.

So of course a Youtube video where someone created an accordion-like instrument consisting of two C64s with bellows made out of 5¼" floppy disks playing Scott Joplin ragtime classics does exist on the internet. Enjoy!

Permalink - posted 2022-10-23

Skyline #16, firey sunset edition

Image link - posted 2022-10-17 in

The framerate conundrum

These days, most of us have devices that can shoot video. And that's no longer as simple as it was 25 years ago. Back then, if you lived in a "60 Hz" country such as the US, your video camera would shoot 30/60 frames per second. (See interlaced video on Wikipedia to understand why this is "30/60".) In parts of the world where the electrical grid runs at 50 Hz, such as Europe, our video cameras would use 25/50 Hz.

Because converting 24 frames per second film to 25 frames per second video is horrible (the image stutters once a second), in 50 Hz territories, film would be sped up to 25 FPS to show on TV or record on video tape or DVD.

These days, we all just watch Youtube where the video framerate can be 24, 25, 30, 50 or 60 FPS.

Most of us also have a video recording device in our pockets that usually supports at least several different framerates.

So... what's the best framerate?

Full article / permalink - posted 2022-10-04

Time to write a new BGP book

20 years ago this month, my book BGP: building reliable networks with the Border Gateway Protocol was published by O'Reilly.

My 20 author copies of the book arrived a bit later:

Full article / permalink - posted 2022-09-29

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