Raspberry Pi News - Page 174 of 182 - CNX Software

January 26, 2013March 28, 2013 by Jean-Luc Aufranc (CNXSoft) - 9 Comments

Raspberry Pi Now Has Experimental Support for VP6, VP8, MJPEG and Ogg Theora Video Codecs

The guys working on the Raspberry Pi (mainly dom) have added preliminary support for VP6, VP8, MJPEG, and Ogg Theora free video codecs, as well as Ogg Vorbis audio codec. Unlike H.264, MPEG-2 and VC1, those are not handled by the hardware video decoder in Broadcom BCM2835 processor, but are accelerated by the Videocore GPU. This means that only SD (and possibly 720p) videos are supported for those codecs. The best way to get support is probably to patiently wait for the Raspberry Pi foundation to release a new Raspbian image, but in case you couldn’t possibly wait, here are the steps to follow: Download and run Hexxeh’s rpi-update script in the Raspberry Pi in order to get the very latest build:

wget https://github.com/Hexxeh/rpi-update/raw/master/rpi-update
chmod 755 rpi-update
sudo ./rpi-update

wget https://github.com/Hexxeh/rpi-update/raw/master/rpi-update

chmod 755 rpi-update

sudo ./rpi-update

Add the following two lines to /boot/config.txt:

start_file=start_x.elf
fixup_file=fixup_x.elf

1 2	start_file=start_x.elf fixup_file=fixup_x.elf

Reboot the Raspberry Pi The GPU firmware is now updated, but you still need the latest version of omxplayer. […]

January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Qt on Embedded Systems – ELCE 2012

Lars Knoll, chief maintainer for the Qt Project, gives a presentation about Qt on embedded systems, including a demo with the Raspberry Pi at the Embedded Linux Conference Europe 2012 in Barcelona, Spain. Abstract: For well over 10 years, Qt has been used in many types of embedded devices, ranging from high-end medical systems, through mobile phones and smartphones, all the way to simple devices like coffee makers. This presentation will show some of the work that has been put in Qt throughout the years to support embedded devices, some of the challenges that the development team faced in order to bring a fully-featured desktop toolkit to resource-limited devices, along with solutions they came up with. Time permitting, the presenter will also show Qt demos running on an embedded device. This session is intended for embedded application developers looking to make use of the capabilities of recent hardware, as well […]

January 16, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Your New ARM SoC Linux Support Check-List – ELCE 2012

Thomas Petazzoni, embedded Linux engineer and trainer at Free Electrons, describes the steps he followed to add a new Marvell SoC to the mainline kernel at ELCE 2012. Abstract: Since Linus Torvalds raised warnings about the state of the ARM architecture support in the Linux kernel, a huge amount of effort and reorganization has happened in the way Linux supports ARM SoCs. From the addition of the device tree to the pinctrl subsystem, from the new clock framework to the new rules in code organization and design, the changes have been significant over the last one and half year in the Arm Linux kernel world. Based on the speaker’s experience on getting the support for the new Marvell Armada 370 and Armada XP SoC support in the mainline Linux kernel, we will give an overview of those changes and summarize the new rules for ARM Linux support. We aim at […]

December 31, 2012May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

MK802 II Mini PC Now Costs as Much as Raspberry Pi Model B. Let’s Compare Them!

MK802 mini PC quickly went viral as it launched in May 2012 for $74 US, and since then many Chinese manufacturers have jumped into the market bringing both new faster devices, and the price down. AllWinner A10s, a low cost version of AllWinner A10 used in MK802, was also launched specifically for this market to bring costs even lower. Today, I’ve been informed an HDMI TV dongle based on AllWinner A10s that sells for $36.55 on Tinydeal.com which is a very good price, but decided to check on Aliexpress to look for comparable deals, and found one shop selling MK802 II for $34.91 including shipping via China Post, which makes it cheaper than the Raspberry Pi model B selling for $35 excluding shipping. Both products target 2 different markets, as MK802 is oriented to the consumer market, and Raspberry Pi targets the educational market, but in practice, it appears people […]

December 20, 2012December 21, 2012 by Jean-Luc Aufranc (CNXSoft) - No Comments

Digia and the Qt Project Release Qt 5.0

The Qt Project and Digia have announced the release of Qt 5.0, which is available via Qt 5.0 page on qt-project.org, or via qt.digia.com/qt5 for commercial customers. Qt 5.0 comes as a full SDK package including Qt 5 framework, Qt Creator 2.6.1, examples and full documentation. Qt 5.0 is available in source code and binary format for Linux (64 and 32 bit), Mac OS X (10.7 and 10.8), and Windows. You can read more about the main changes and new features compared to Qt 4.8, on my previous blog post about Qt 5 Alpha. A video showcasing some of the key features of Qt 5 has been uploaded to Youtube. The video above is actually a screen capture of a Qt 5 based application using Qt Quick, OpenGL and WebKit, running in a Mac. Audio has been added with iMovie application. You can try this Qt 5 Launch Demo by yourself by […]

December 19, 2012December 19, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

3.95 Euros RPI-UEXT Breadboard & UEXT Adapter for Raspberry Pi is Now Available

Last month, I wrote about an upcoming T-shaped adapter for the Raspberry Pi that can easily plug into a breadboard, and provides a UEXT connector that can bring new features (RTC, GPRS, sensors, relays…) to the Raspberry Pi via low cost external UEXT modules. Olimex has just announced the RPI-UEXT adapter is now available for 3.95 Euros. To connect RPI-UEXT adapter to the Raspberry Pi, you’ll need to purchase a 26-pin ribbon cable and a breadboard if you don’t have these already. Olimex provides those 2 for respectively 2 & 2.95 Euros. That means a complete set would cost 8.90 Euros. As discussed on my first RPI-UEXT post, what makes this little board really interesting are all the existing UEXT modules (over 20) that bring new features at very low cost. Olimex uploaded a video showing the Raspberry Pi, the RPI-UEXT and the MOD-IO UEXT module connected together, with the Raspberry […]

December 17, 2012December 17, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

libavg on Raspberry Pi

libavg development team has recently announced a beta port of their multimedia library to the Raspberry Pi. libavg is a high-level development platform for media-centric applications using Python as scripting language and written in C++. I came to know this platform as I tried Xibo Digital Signage, and I tested it on ARM platforms. Up to know this would only work using software rendering/decoding, and everything was painfully slow on ARM, but libavg developers are now making use of OpenGL ES to boost graphics speed. More work is needed, and they intend to eventually support features such as hardware video decoding (OpenMAX possibly via gstreamer) and compressed textures. Installing libavg on Raspberry Pi. Pre-built packages are available for Raspberry, so installation is pretty straight forward:

sudo apt-get install libxml2 libpango1.0-0 librsvg2-2 libgdk-pixbuf2.0-0 \
  libavcodec53 libavformat53 libswscale2 libboost-python1.49.0 \
  libboost-thread1.49.0 libsdl1.2debian libxxf86vm1
wget https://www.libavg.de/site/attachments/download/190 -O libavg-raspberry.tar.bz2
sudo tar -C /usr/local -xjf libavg-raspberry.tar.bz2

sudo apt-get install libxml2 libpango1.0-0 librsvg2-2 libgdk-pixbuf2.0-0 \

libavcodec53 libavformat53 libswscale2 libboost-python1.49.0 \

libboost-thread1.49.0 libsdl1.2debian libxxf86vm1

wget https://www.libavg.de/site/attachments/download/190 -O libavg-raspberry.tar.bz2

sudo tar -C /usr/local -xjf libavg-raspberry.tar.bz2

Running Samples Apps 32 samples are located in /usr/local/lib/python2.7/dist-packages/libavg/samples/ directory, and they rely on X11, so first start LXDE:

startx

startx

Open a serial console (LXTerminal) […]