3R Max DVR Info and Ethernet FTP Telnet login

The 3R MAXDVR4000 is a 1U rackmount DVR with four composite inputs.

There is not much info out there about them, there are two IDE hard drives inside formatted with resizerfs, a Axis Video Controller serial and Ethernet port.

If there hard drives are no longer working, they can be removed and replaced with another pair of working drives.  The sizes do not have to match either.  The drives are formatted and file and folder structures are copied on to the new hard drives upon power up.  You may notice a file called 'Hdd_Image.tgz' copied on one or both drives, containing the default info.

Conducting a Wireshark trace on the Ethernet port, yielded a default static IP of 192.168.0.60, with a Telnet and FTP server.

Default login credentials are:
root
pass

Default front panel password is 0000
 

Files can be easily pulled from the unit using FTP and the unit work in a circular buffer mode.


Some console dumps:

Axis Developer Board LX release 2.0.0
Linux 2.4.5 on a cris (ttyp0)

[root@3R-miniMax /]112# mount
/dev/root on / type cramfs (ro)
proc on /proc type proc (rw)
/dev/flash2 on /mnt/flash type jffs (rw)
tmpfs on /var type tmpfs (rw)
/dev/hda1 on /mnt/hda1 type reiserfs (rw)

[root@3R-miniMax /]643# cat /proc/cpuinfo
cpu        : CRIS
cpu revision    : 11
cpu model    : ETRAX 100LX v2
cache size    : 8 kB
fpu        : no
mmu        : yes
mmu DMA bug    : no
ethernet    : 10/100 Mbps
token ring    : no
scsi        : yes
ata        : yes
usb        : yes
bogomips    : 166.40

[root@3R-miniMax /]643# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/flash2               1920      1344       576  70% /mnt/flash
tmpfs                     8432        48      8384   1% /var
/dev/hda1......

Some more info can be found from: http://www.chinasaixin.com/3R/3R/body02b-02_01.htm

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Motion webcam two webcams change order on boot /dev/video0 persistent linux ubuntu

Copied from various resources on the web, Original Reference Here

When using Motion http://www.lavrsen.dk/foswiki/bin/view/Motion with multiple usb webcams, sometimes the dev order of the webcams changes on reboot of a machine. 

i.e.  /dev/video0 becomes dev/video1

This can seriously stuff things up.  To overcome this, create a udev rule to lock/assign a device dev location.

First do a lsusb, notice that I have two webcams, one is built into the screen and the other is USB connected.

Take note of the ID of the webcam you want
i.e 045e:00f7


Now do a:
sudo touch /etc/udev/rules.d/25-name-video-devices.rules


Edit this file and enter the following:
SUBSYSTEM=="video4linux", BUS=="usb", SYSFS{idVendor}=="045e", SYSFS{idProduct}=="00f7", NAME="video5"


I assigned the webcam to give a default location of /dev/video5 so it would never conflict with other webcams fitted in the future (hopefully)

Don't forget to modify your ~/.motion/motion.conf file and change the video device to /dev/video5


What happens if you have two webcams and they are both the same?  Fuuuuuuuuuuuuuuuuu!!!!!!!!!!!!!!!

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DIY Video Bauln, Mk1 FAIL

Trying to make a video balun to convert 75ohm unbalanced to 100 ohm UTP balanced is hard, when there is no design available and it is clouded is secrecy.

There is a patent for them out there, google patents has a copy, but from what I can see, there is no way it could work on composite video without DC restoration on the receiving side.
I decided to make a simple voltage balun, using ferrite rings from a old motherboard.

The result was a fail, the picture has poor colouring and the image was tearing.

My next design will be a current balun.
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Networking and Computing Videos

A great resource, this guy teaches very well.  If you don't want to read pages of stuff then eli's videos are what you need.  Subject include networking and computing and also other Stuff.

Everyman Videos






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