Imagemagick on ARJ (English)

Optimizing JPG and PNG files for the web

Fri, 05 Jul 2024 00:00:00 +0000

I often post images on the web but I rarely think about optimizing the files properly before uploading. Here is a solution for how to do it programmatically in the terminal.

Asking ChatGPT for help

ChatGPT is great for some things, including suggesting program code for well-known problems. However, while it came up with something that worked right from the start, it took a few iterations to come up with a solution that does what I want. I wanted it to work on all image files in all the subfolders (using a recursive search), reduce the images to maxium 1920 pixels, and optimize them without recompression.

Programmatically resizing a folder of images

Wed, 13 Apr 2022 00:00:00 +0000

This is a note to self about how to programmatically resize and crop many images using It all started with a folder full of photos with different pixel...

Making 100 video poster images programmatically

Tue, 15 Jun 2021 00:00:00 +0000

We are organizing the at RITMO a week from now Like many other conferences these days this one will also be run online Presentations have been prerecorded...

Creating different types of keyframe displays with FFmpeg

Sun, 01 Mar 2020 00:00:00 +0000

In some recent posts I have explored the creation of and In this blog post I will explore different ways of generating keyframe displays using the very...

Creating image masks from video file

Fri, 21 Feb 2020 00:00:00 +0000

As part of my exploration in with FFmpeg and ImageMagick I tried out a number of things that did not help solve the initial problem but still could be...

Creating multi-exposure keyframe image displays with FFmpeg and ImageMagick

Fri, 21 Feb 2020 00:00:00 +0000

While I was testing visualization of some videos from the earlier today I wanted to also create some keyframe image displays This can be seen as a way of...