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