Multimedia

Laszlo Agocs

Qt 5.5, computer vision, and the Nitrogen6X

Published Thursday June 4th, 2015 | 3 Comments on Qt 5.5, computer vision, and the Nitrogen6X
Posted in Embedded, Graphics, Multimedia, Qt Quick 2

In a previous post we have introduced one of the many new features of the upcoming Qt 5.5: the ability to easily integrate image processing and vision algorithms with camera and video streams via Qt Multimedia. It is now time to see the briefly mentioned OpenCV-based example in more detail. Nitrogen6X is a single board […]

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Laszlo Agocs

Qt Quick with the power of OpenCL on Embedded Linux devices

Published Monday April 20th, 2015 | 9 Comments on Qt Quick with the power of OpenCL on Embedded Linux devices
Posted in C++, Embedded, Graphics, Multimedia, OpenGL, Qt Quick

Many Qt users encounter a need to integrate GPU compute solutions into their Qt-based applications. What is more, with the advent of compute API implementations and powerful GPUs on embedded devices, using OpenCL or CUDA on an Embedded Linux device is a reality now. In a previous post we looked at NVIDIA’s Jetson TK1 board […]

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Laszlo Agocs

Introducing video filters in Qt Multimedia

Published Friday March 20th, 2015 | 15 Comments on Introducing video filters in Qt Multimedia
Posted in Graphics, Multimedia, OpenGL, Qt Quick

Qt Multimedia makes it very easy to get a video stream from the camera or a video file rendered as part of your application’s Qt Quick scene. What is more, its modularized backend and video node plugin system allows to provide hardware accelerated, zero copy solutions on platforms where such an option is available. All […]

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Pimp my video: shader effects and multimedia

Published Wednesday February 29th, 2012 | 29 Comments on Pimp my video: shader effects and multimedia
Posted in Multimedia, OpenGL, Qt Quick

Introduction A topic which has been receiving quite a bit of attention recently is the use of shader programs to apply effects within Qt Quick applications. Once you have grasped the basics of the shader programming language, embedding the shaders in your application is made really easy by Qt Quick, with the result that stunning […]

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Testing QtQuick 2 (Qt 5) on your n9/n950

Published Monday November 21st, 2011 | 5 Comments on Testing QtQuick 2 (Qt 5) on your n9/n950
Posted in Embedded, Lighthouse, Maemo, MeeGo, Multimedia, OpenGL, Qt, Qt Quick | Tags: , ,

QtQuick 2 promises superior performance, a new particle system and a host of new possibilities: http://doc.qt.nokia.com/qt5/qtquick2-whatsnew.html It is also quite ripe for testing if you are into that kind of thing. This is my personally recommended approach to testing QtQuick 2 on your n9(50) at this point in time and I have to stress that […]

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Qt 4.7.4 Release Bundle for Symbian News

Published Tuesday November 8th, 2011 | 25 Comments on Qt 4.7.4 Release Bundle for Symbian News
Posted in Multimedia, News, Qt, Qt Quick, Qt SDK, QtMobility, Releases, S60, Symbian

Today we are making available the Qt 4.7.4 release bundle for all Symbian^3, Symbian Anna, and Symbian Belle devices. The Qt SDK 1.1.4 update has the necessary Symbian Anna and Belle build targets available allowing application development for Qt 4.7.4. Nokia Store deployments are also possible. This is a big release for Qt developers. In this […]

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QtMultimedia in action: a spectrum analyser

Published Tuesday May 18th, 2010 | 17 Comments on QtMultimedia in action: a spectrum analyser
Posted in Multimedia, S60, Symbian

In the previous post, we looked at the QtMultimedia audio APIs, and discussed when you might want to use them. In this post, we’ll look at a demo app which uses these APIs, and discuss how it was developed, how it makes use of QAudioInput and QAudioOutput, and some of the challenges which needed to […]

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Low-level audio processing with QtMultimedia

Published Monday May 10th, 2010 | 21 Comments on Low-level audio processing with QtMultimedia
Posted in Multimedia

One of the new features introduced in Qt 4.6 is the QtMultimedia module. The ‘big picture’ view of QtMultimedia has been presented in an earlier post to this blog, and has been recently updated. Here I want to take a closer look at the low-level audio APIs in particular, to discuss the types of applications […]

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Qt 4.7 scope change regarding Qt Multimedia

Published Thursday May 6th, 2010 | 21 Comments on Qt 4.7 scope change regarding Qt Multimedia
Posted in Multimedia, Qt Quick, QtMobility, WebKit

Over the past few releases, Qt has become richer, more powerful — and bigger. So far we have been using the same source code repository for all the modules that are included in Qt 4.x releases, but during the integration phase of Qt 4.7, it has become clear that we need to make Qt more […]

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Eskil Abrahamsen Blomfeldt

Qt (de) Spotify running on a Nokia N900

Published Friday October 23rd, 2009 | 5 Comments on Qt (de) Spotify running on a Nokia N900
Posted in C++, Labs, Multimedia, Qt, Uncategorized

Since there is currently no official Spotify client that can run on Embedded Linux (wine doesn’t run on arm architectures), and since I really wanted to have access to my Spotify account from my N900, I decided to give the open source Spotify client library called “despotify” a run. This is a library of C […]

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