http://dietzm.de/cgi-bin/weblog_basic news - technical stuff - photos Mon, 07 Dec 2009 00:13:07 +0000 http://backend.userland.com/rss092 en Ich habe heute ein Wer kennt wen Widget für mein Nokia 5800 MusikXpress gebaut. Es ruft einfach die mobile Version der WKW Webseite auf (http://mobil.wer-kennt-wen.de/) Download: Wer-kennt-wen Widget (wkw.wgz) http://dietzm.de/cgi-bin/weblog_basic/index.php?p=45 I've migrated my nanoblogger based weblog to the Strato Weblog Basic which is based on WordPress The migration was very error prone, because Wordpress adds a "br" after each line. Also Strato does not allow to use a custom theme and the build-in theme has only a width of 800px. So, the most ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=44 Ive create a new version of the commandline videograbber tool MDGrab. (see downloads) New Features: -send keep alive packets -authentication added -webcam control added (up,left,right,down,nightshot) -some fixes It required the following jars which you can find here: http://jakarta.apache.org/commons/ -commons-logging -commons-httpclient -commons-codecs Example command to view live video on linux: java -cp commons-httpclient-3.0.1.jar:commons-logging.jar:commons-codec-1.3.jar:MDGrab.jarde.dietzm.webcam.MDGrab 192.168.0.55 - admin adminpw | mplayer - ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=34 The Ovislink Airlive WL-5460CAM has a security hole which allows you to access the buildin Linux system, read and modify configuration files. How ? -Open the web interface of the webcam -Choose configuration -Store/backup your configuration into a file -Open this file with a text editor -Search the section with the /sbin/ifconfig .... line, this ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=24 I've finished the first version of a java based video grabber tool. It grabs the live stream of the ovislink webcam and stores it into a file. MDGrab Java Package (JRE 1.5.x required) To start the video grabber command line tool, enter the following command: java -jar MDGrab.jar [webcam IP-Address] [output filename] http://dietzm.de/cgi-bin/weblog_basic/index.php?p=26 To get the plain mpeg4 video stream I had to remove Cellvisions additional header structure. The header seems to be always 40 bytes long, and index 24-27 are the size of the following video data. In java it look like this: byte[] hdr = new byte[HEADERSIZE]; int r ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=27 After some hours of network tracing. I found out how the Webcam works: It has multiple TCP Ports open: Port 80 = Web Interface. All commands to control the webcam (pan&tilt...) are http requests.It also handles the authentication Port 5000 = Stream initialization. Port 5001 = Streaming Port, sends the video packets Port 500 ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=28 Meanwhile I found out that the Ovislink Airlive 5460CAM is equal to the Cellvision CAS670W. Cellvision seems to be the original developer of the Webcam, while tracing the network traffic I found a lot of "Cellvision" strings in the package header. Cellvision offers a Aragorn SDK which is a documentation of a webcam ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=36 I've bought a Ovislink Airlive 5460CAM Webcam. It's a really nice Webcam with integrated Wireless LAN and Pan&Tilt function.A detailed specification could be found here Ovislink AirliveAfter unpacking the webcam, I found out that the java applet was missing, instead an ActiveX plugin was required to use the Webcam. WTF...So, I've decided to ... http://dietzm.de/cgi-bin/weblog_basic/index.php?p=6 I've installed the little Endian Debian port on my NSLU2. Summary: +The official Debian Apt repository can be used +More packages available +Faster software updates -Worser network performance http://dietzm.de/cgi-bin/weblog_basic/index.php?p=39