Useful info for developers.
When developing software for installations that need to remain up for very long time without being restarted, it is pretty relevant to monitor it to verify it is working properly.[...]
Many devices nowadays come with a notch at the top of the screen. You can clearly avoid drawing where cutouts are placed and ask the system to create a window[...]
The old days of OpenMAX and omxplayer are now almost gone. Raspberry Pi has long moved to DRM/KMS and V4L2. Using omxplayer from Qt had the great benefit of reducing[...]
Rendering YUV frames is pretty frequent when it comes to video streams. For instance, frames coming from a camera or frames resulting from the decoding of compressed streams may be[...]
It has been some time since Qt 6 was released. Now that Qt 6.2 is almost out, I guess it is time to have a look at how Qt 6[...]
I frequently need to measure the frame rate in a Qt/QML application to have an idea of how heavy the changes I’m making are. In the past, I found two[...]
While porting this blog to WordPress as an experiment, I came across a pretty frequent problem: using requirejs in a WordPress post. In my case, requirejs is needed to use[...]
This post is mostly for myself 🙂 In some cases, couldn’t find out why, but shared directories fail to mount in VMWare on Linux. In these cases, this is the[...]
There are a few solutions to get a browser with good performance on Raspberry Pi 2, but I wanted to test solutions that provide this to a Qt app on[...]
OpenGL is a good technology, and playing around with it on Android can be real fun! 🙂 By streaming a video to texture it is possible to create interesting effects,[...]
i.MX 6 is a good device. Qt runs pretty well on it. Also a plugin for hardware accelerated and zero-copy rendering seems to work pretty well. Simply building Qt for[...]
For many uses, playing video while animations are running is pretty useful and it is also considerably stressful for the GPU. I therefore tested a couple of cheap chips with[...]
The new ports of Qt to mobile systems like Android, iOS and WinRT are getting more and more reliable. I just wanted to have a look at the current stage[...]
EDIT 02.25.2015: It seems to be missing even in Ubuntu 14.10. But probably the quickest way to install is: I was trying to develop an application that uses gstreamer 0.10[...]
I really don’t like FileMerge.app: I’ve always been feeling that Mac OS was missing a good tool like meld. Actually this turns out to be simply false: installing meld on[...]
There are some pretty common libraries that come very handy in some situations when developing for common embedded systems like Android and iOS. One of this is the ICU library,[...]
According to what I read around, it should be possible to install some build of Qt 5 using apt on Raspberry by adding the Qt repo: read here. However, some[...]
Ok, I’ve been waiting to do this for quite some time but never had the time to actually do it. I tried this quickly twice but without success because of[...]
I’ve been recently asked to do a little research on how to implement animations on a video surface in Android, somehow similarly to how I did in the previous posts[...]
After compiling Qt 5.0 for Raspberry Pi, I wanted to try all the modules. I compiled and tested the simplest modules first, like: Everything worked quite smoothly, without any change,[...]