Gracef

Hi,netvisiondvr has trial software, you can download it from the website.

Hi,just like they said each brand of capture card has its own software and you can not mix or match software and cards,but the stablity of software is different. You'd better choose the most stable software with cards.

Hi,ayalas,PC-DVR is easy to expand,i mean you can plug up to 5 dvr cards on a pc to up to maximum 64 channels.but stand alone dvr can't.

on the other hand,stand alone dvr is not easy to be infected virus.

besides,pc-dvr has more demand on software,so it's convenient to add more function.but stand alone dvr can't.

Hope it's useful to you!

I am delighted to inform you Netvision hybrid DVR system is available, which will accept both analog video input through cards and IP camera/video server digital input through an Ethernet port.

Hi, in fact, hardware compression dvr 2*16ch can be 960fps in DCIF resolution in real time. and it's hybrid solution can meet your need perfectly.

Grace

Hi, in fact,most H.264 hardware compression cards can support maximum 64 channels.so it can be cater to your need of 50----60 IP cameras solution.

Additionally, as to the IP surveillance system software , i think the most important aspect is the software function but not only how many brand IP camera can support.

Hi,i am agree with ravenss,in fact,only has 3-6 fps.the lag problem depend on the rate of internet transmit and mobile CPU.

HI,we often recommend Intel motherboard and ATI graphics.So i think they are best for pc-dvr.

hI,NV4008HF can be 4CIF resolution realtime when recording. which can meet your demand perfectly.

hi,to my knowledge,motion detection work well according to the contrast.If the place is too dark,maybe motion detection can't work well.

Ya,don't mind where it comes from.just can meet your needs is good.Normally,some software compression cards can meet your needs and cheaper, but now some new model hardware compression cards is cheaper too,and can meet your needs perfectly.

HI,I am Grace,from China netvision technology. Nice to know all of you!

hehe,netvision hardware compression cards can support maximum 64 ch.

Hi,NV4016HC and NV4016HCS H.264 hardware compression card can do 480fps on 16 channels at D1 in Realtime in preview.

In recording,NV4008HF can do 240fps on 8 channes at 4CIF in Reatime.

Hi, for the best recording quality,please set the resolution at

704*576(PAL)、704*480(NTSC) ,please have a try!

hi, Now that you have a 16ch system,if you want to expand it to 32ch, just stack a 16ch cards on the PC. And if you want to expand it later, it same to do so. the Hardware compression cards can support maximum 64ch.

hi,Geovision is software compression card,it is good,but like what you said is a bit expensive,which can't support many channels,and compress data by chipsets of PC CPU but not the CARDS. maybe you can try the hardware compression cards.

Chateau maybe is a France brand.

rabindra,i think it's the problem of the graphic card,or the graphic card's driver is not be installed correctly.Please reinstall your driver or change a nother graphic card to try.

Please take the hardware compression cards into account,which adopts TI chipsets,which is very reliable and stable.

in fact,there are many brands dvr adopt the advanced H.264 compression technology,just the function of software is different.

In a word,the image quality of 2*16ch dvr is better than 32 ch dvr,in fact ,you can plug two 16ch dvr in one pc.

[edit by mod - please stay on topic, he didnt ask what is better or worse, thanks]

One my frends have use the netvisiondvr for almost the same requirements like your. he is satisfactory with it.

grace_fdf@hotmail.com

hi,bruce, the flexibility of pc dvr is better than embedded dvr,and pc dvr is more easy to extend function,and the upgrading of pc is easier than embedded dvr.and the cost performance of pc is better than embedded.

but the stability of embedded dvr is better than PC dvr.

Grace feng

hi,yes,the two streams have different bitrate

we use TI

Grace