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April 22, 2013 by Jean-Luc Aufranc (CNXSoft) - 22 Comments

You-Get – Video Download Script for YouTube, YouKu, DailyMotion, and More

YouKu is the equivalent of YouTube in China, and earlier today I wanted to download a video from the service, so I’ve looked for an application or script that can do the job in Linux. I’ve finally come across you-get, a python 3 script that claims to be able to download videos from an impressive number of websites, namely: YouTube Vimeo Coursera Blip Dailymotion Facebook Google+ Google Drive Tumblr Vine SoundCloud Mixcloud Freesound JPopsuki VID48 Niconico (ニコニコ動画) Youku (优酷) Tudou (土豆) YinYueTai (音悦台) AcFun bilibili CNTV (中国网络电视台) Douban (豆瓣) ifeng (凤凰视频) iQIYI (爱奇艺) Joy.cn (激动网) Ku6 (酷6网) MioMio h NetEase (网易视频) (v.163.com) PPTV.com QQ (腾讯视频) (v.qq.com) Sina (新浪视频) (video.sina.com.cn) Sohu (搜狐视频) (tv.sohu.com) 56 (56网) Xiami (虾米) Baidu (百度音乐) (music.baidu.com) SongTaste I won’t try all, but just test it with YouKu and YouTube. First things first, let’s install it:

git clone git://github.com/soimort/you-get.git
cd you-get
sudo apt-get install python3 python3-setuptools
./you-get -V
make install

git clone git://github.com/soimort/you-get.git

cd you-get

sudo apt-get install python3 python3-setuptools

./you-get -V

make install

Time to go to youku.com and download a video:

you-get http://v.youku.com/v_show/id_XNTQ1OTk3NTAw.html
Video Site: Youku.com
Title:      1 second boot QT app in linux-sunxi with  A10
Type:       Flash video (video/x-flv)
Size:       5.45 MB (5711001 Bytes)

Downloading 1 second boot QT app in linux-sunxi with  A10.flv ...
100.0% (  5.4/5.4  MB) [========================================] 1/1

you-get http://v.youku.com/v_show/id_XNTQ1OTk3NTAw.html

Video Site: Youku.com

Title: 1 second boot QT app in linux-sunxi with A10

Type: Flash video (video/x-flv)

Size: 5.45 MB (5711001 Bytes)

Downloading 1 second boot QT app in linux-sunxi with A10.flv ...

100.0% ( 5.4/5.4 MB) [========================================] 1/1

Success! […]

February 2, 2013February 2, 2013 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Replicate CAPE Adds 3D Printring Capability to the Beaglebone

Beagleboard.org launched the Beaglebone Cape Design Contest back in November, several designs were submitted, and yesterday, they announced the 3 winning CAPEs who will be manufactured and sold by Circuitco Electronics: Replicape by Elias Bakken – 3D printer cape Interacto by Chris Clark – Cape with a triple axis accelerometer,a gyroscope, a magnetometer and a 640×480 30fps camera. Geiger cape by Matt Ranostay – Geiger counter cape Since today I’ve started to write about 3D printing, let’s carry on and have a closer look at the Replicape. The Replicape 3D printer cape includes: 5 stepper motors (X, Y, Z, Ext1, Ext2) 3 high power MOSFETs (PWM controlled) for 2 extruders and 1 HPB 3 medium power MOSFETs (PWM controlled) for up to 3 fans 3 analog input ports for thermistors 3 inputs for end stops (X, Y, Z) Programmable current limits on steppers motor drivers (SMD). No need to manually adjust […]

January 15, 2013January 31, 2013 by Jean-Luc Aufranc (CNXSoft) - No Comments

Beaglebone: The Perfect Telemetry Platform? – ELCE 2012

Matt Ranostay, technical staff at Ranostay Industries, gives a presentation about a telemetry system based on Beaglebone at the Embedded Linux Conference Europe on November 5, 2012. Abstract: The author will discuss his ongoing and other team members efforts to develop hardware and software that reports sensor data to the community. This talk will be split into several parts a) types of useful sensors b) hardware design of Beaglebone capes c) and telemetry reports to Pachube/Cosm. Demonstrating that in the new world of cheap prototyping boards with I2C, GPIO, and SPI that anyone can setup a decent monitoring system for home security, automation, and weather reporting. There will be a live demo of prototype geiger counter + weather station. The audience targeted is the professional hobbyist who likes to hack on microcontrollers in their spare time. It will take little to medium knowledge of electrical engineering to follow this talk. […]

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) […]

October 29, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Xibo Digital Signage Version 1.4.0 Released

Xibo has just announced the release of Xibo 1.4.0 (codename: “Brorsen”). Contrary to version 1.3.0 which was a development release, Xibo 1.4.0 is a stable release and you should consider updating your current installations if you want to take advantage of some of the 27 new features and/or 108 bug fixes. This version replaces the previous stable version (1.2.2) released 18 months ago. If you are not familiar with Xibo, it is an open source Client/Server digital signage framework that can run in Windows (.NET implementation) and Linux (Client: Python, Server: LAMP). For some more details, you can read my introduction to Xibo and/or a “getting started” tutorial I wrote some time ago. Main new features in Xibo 1.4.0 Significant improvements to permissions – View, Edit and Delete permissions can now be set on the following items: Library Media Layouts Regions in Layouts Media on Region Timelines DataSets Display Groups […]

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

ConnectPort X2e SEP 2.0 Compliant Home Energy Gateway with Zigbee Connectivity

Digi International announced the “ConnectPort X2e for Smart Energy”, a Linux-based Home Energy Gateway with Zigbee connectivity based on Freescale Home Energy Gateway Reference Platform powered by Freescale i.MX28 processor. The “ConnectPort X2e for Smart Energy” is upgradable to comply with the new Smart Energy 2.0 Profile (SEP 2.0) and enables ZigBee devices on a Home Area Network (HAN) to communicate with an energy service provider. The new gateway is a low-cost, enhanced version (hence the “e” in X2e) of Digi’s ZigBee Smart Energy Gateways. The device connects ZigBee Smart Energy devices from a Home Area Network (HAN) to an energy service provider via broadband. It supports over-the-air updates of connected Smart Energy devices, making it easier for utilities and application partners to establish and maintain large Smart Energy device deployments. The company offers two models namely: ConnectPort X2e, ZigBee SE Coordinator for stand-alone Smart Energy networks that do not […]

January 24, 2012July 17, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Linux Debugging: Listing Shared Libraries at Runtime

I had a library (a python plugin) that crashed and outputted the “very useful”: illegal instruction I tried pdb (the Python Debugger) to find the issue without success. So I tried to add some printf to this library but none were outputted at runtime. So I guessed the illegal instructions was generated by the shared libraries. Let’s see how many libraries we’ve got: ldd libbrowsernode.so | wc -l 125 Oh dear!… 125 libraries.. This is where panic sets in. Luckily, there is a simple way to list the dynamic libraries as they are loaded (and some more useful info). Simply set: export LD_DEBUG=files before running your program. This is extremely verbose, so I recommend you redirect the output to a file. This method allowed me to find undefined symbols during dynamic libraries load time with errors such as: opening file=/usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so [0]; direct_opencount=1 14121: 14121: /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so: error: symbol lookup error: undefined […]