LinkDelight CCTV H.264 4CH DVR Card
CCTV H.264 4CH DVR Card Real-time 100/120FPS Audio/video Capture Security Card (SKU: ESC09)
As found on eBay: [[1]] Cost: around 22 $US
Features
This HD Digital Video Recording Card is installed to your computer host and the coming adapter cable connected with camera, to achieved host working as DVR and watch the camera image in LCD display. This DVR card is 4 channels, so it support 4pcs cameras and you can see 4 camera images in LCD display simultaneously.
- Video compression adopts advanced H.264
- Support widescreen display, including 1024*768 and above
- 4CH video 4CH audio, coming with 4ch video/audio connection cable
- Support smart mobile phone view, Windows mobile, Symbian mobile, IPhone
- Support Windows 2000 /2003 / XP / Vista / Windows 7 OS
- Support 4 split-screens playback and convenient to search recording files
- Support net remote preview, playback, record, PTZ control
- Support manual record, timer record and motion detection record
- PTZ: support multi-protocol, RS232/485, highspeed dome control software
- Support motion detection alarm & video lost alarm
- Security: multi-lever password, user right option, system keyboard lock
Kindly Note: This cable isn’t compatible with the system of Window7 64bit
Features
Model |
4004 |
|
Video |
Format |
NTSC / PAL |
Compression |
H ． 264 |
|
Input |
4CH BNC |
|
Output |
VGA |
|
Audio |
4CH AV |
|
Support OS |
Windows 2000 /2003 / XP / Vista / Windows 7 |
|
Display |
Frame rate |
NTSC:120fps, PAL: 100fps |
Resolution |
352×288 320×288 704×576 |
|
Split screen |
1 、 4 、 cycle |
|
Record |
Frame rate |
NTSC:120fps, PAL: 100fps |
Resolution |
352×288 320×288 704×576 |
|
Recording Mode |
Manual, Time, Motion Detection |
|
Mode |
1/8—8 times speed playback optional |
|
Net Function |
Transmission mode |
LAN / PSTN / ISDN / ADSL |
Transmission protocol |
UDP/TCP |
|
Connection Mode |
Clients software/ IE Browse/Smart phone client software |
|
Main functions |
Remote preview 、 Video playback 、 Remote control |
|
Alert |
type |
Motion detection, Video loss |
Linkage |
Channel record 、 Sound alerts |
|
Others |
PTZ |
Support multi-protocol,RS232/485,highspeed dome control software |
Back up |
USB 、 Network 、 CD-RW 、 DVD-RW |
|
security |
Multi-lever password, user right option, system keyboard lock |
|
Net Weight |
52g |
|
ZoneMinder
I was able to make this card under Ubuntu 12.04 server with a minimal amount of fuss. The Card is based on a Techwell 6800 Chipset, and I was able to find the appropriate Linux Drivers at this site:
Drivers: [Drivers]
Installation:
mkdir techwell cd techwell/ git clone git://gitorious.org/tw68/tw68-v2.git tw68-v2/ make sudo make install sudo modprobe tw68 lsmod|grep tw dmesg
I'm sorry I haven't kept a copy of the whole session. After compiling and "loading" the tw68 modules, you need to check that the modules are actually loaded (lsmod|grep tw). You should have the following output:
~$ lsmod |grep tw tw68 44633 2 videodev 86588 3 tw68 videobuf_dma_sg 18786 1 tw68 videobuf_core 25409 2 tw68,videobuf_dma_sg btcx_risc 13400 1 tw68
Issuing the dmesg command, you should see 4 "video devices" found, labeled from /dev/video0 to /dev/video3... Each video device is tied to an input from the card.
I haven't bothered yet with the "audio" part of it, so I can't tell you if that works or not. If you're able to test it, please update this wiki page to let others know...
Although I do get a lot of messages in dmesg, concerning "[261734.936103] tw6810[0]/0: [c5c8bb40/1] timeout - dma=0x05f8a000", the capture does work well.
[10/26/2012] I found that if you're using two cards you can end up with some really nasty artifacts that manifest themselves as white horizontal lines on the feeds, after doing some calculations finding myself close to saturating PCI bus, I found these instructions on the phillips page:
Do not forget to to increase "shared memory" at the end of /etc/sysctl.conf with kernel.shmall = 134217728 kernel.shmmax = 134217728 cause your card supports 640x480 pixel with 24 bit depth and thats more than 112Mbyte ;-)
doing this allows me to run 8 cams @ 12fps full 640x480 without artifacts
Zoneminder configuration
The following screenshots show how I configured the device in my zoneminder:
Observations
I currently have zoneminder installed on an Intel Atom 525 with 4 GB of RAM. This same system has the "LinkDelight CCTV H.264 4CH DVR Card" installed on it and monitoring 2 CCTV cameras at around ~20fps each (@ 640x480), with ~30 % Cpu Usage across the 4 "cores".
Mind you, it is also receiving a video stream from an IP camera @ 15 fps (640x480). I haven't enable any motion detection yet.
All-in-all it's a nice, cheap card that works for me.
