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KDE: Summer with Kdenlive, Linux perf and KCachegrind, Qt at KDAB and Plasma 5.16 Beta

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KDE
  • This Summer with Kdenlive

    Hi! I’m Akhil K Gangadharan and I’ve been selected for GSoC this year with Kdenlive. My project is titled ‘Revamping the Titler Tool’ and my work for this summer aims to kickoff the complete revamp of one of the major tools used in video-editing in Kdenlive, called the Titler tool.

    [...]

    After the backend is done with, we begin integrating it with Kdenlive and evolve the titler to use the new backend.

    A great long challenge lies ahead, and I’m looking forward to this summer and beyond with the community to complete writing the tool - right from the backend to the new UI.

  • Linux perf and KCachegrind

    If you occassionally do performance profiling as I do, you probably know Valgrind's Callgrind and the related UI KCachegrind. While Callgrind is a pretty powerful tool, running it takes quite a while (not exactly fun to do with something as big as e.g. LibreOffice).

    Recently I finally gave Linux perf a try. Not quite sure why I didn't use it before, IIRC when I tried it somewhen long ago, it was probably difficult to set up or something. Using perf record has very little overhead, but I wasn't exactly thrilled by perf report. I mean, it's text UI, and it just gives a list of functions, so if I want to see anything close to a call graph, I have to manually expand one function, expand another function inside it, expand yet another function inside that, and so on. Not that it wouldn't work, but compared to just looking at what KCachegrind shows and seeing ...

    When figuring out how to use perf, while watching a talk from Milian Wolff, on one slide I noticed a mention of a Callgrind script. Of course I had to try it. It was a bit slow, but hey, I could finally look at perf results without feeling like that's an effort. Well, and then I improved the part of the script that was slow, so I guess I've just put the effort elsewhere Smile.

  • KDAB helps unu build Qt-based UI

    Those of you who’ve visited KDAB’s offices in Berlin, will know we have a fleet of electric scooters for our staff. You may have even tried one yourself!

    Today, unu, the Berlin-based mobility company that makes them, launches their latest electric scooter – the unu Scooter.

    The unu Scooter has been completely redeveloped, is more open to sharing and rental services and has the fastest acceleration you’ll find in any electric scooter, courtesy of its Bosch engine.

  • Help Test Plasma 5.16 Beta

    Plasma 5.16 beta was released last week and there?s now a further couple of weeks to test it to find and fix all the beasties. To help out download the Neon Testing image and install it in a virtual machine or on your raw hardware. You probably want to do a full-upgrade to make sure you have the latest builds. Then try out the new notifications system, or the new animated wallpaper settings or anything else mentioned in the release announcement. When you find a problem report it on bugs.kde.org and/or chat on the Plasma Matrix room. Thanks for your help!

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.