aliensquale 0 Posted February 19, 2004 anybody know? Share this post Link to post Share on other sites
qman 0 Posted February 20, 2004 Well, if you are here in the US, we all in opinion think that between me and AVconsulting, there is no one better Share this post Link to post Share on other sites
squale 0 Posted February 20, 2004 what are you a distributor for? what is the best possible price you can get me a Geovision GV-250 card for? email me at: djmixerman@hotmail.com with the price other question... I talked to this guy from a CCTV dealership and he told me that BNC capture cards for CCTV are junk and will make your camera image look way worse than what it would like like on a stand-alone DVR system or even on the televsion. Is this true? Share this post Link to post Share on other sites
rory 0 Posted February 20, 2004 some of them are junk, GeoVision from what I have seen online looks clear, but they are not going to be as clear in full screen as a regular DVR with a CCTV monitor, at least not from what I have seen. I may be wrong though? Rory Share this post Link to post Share on other sites
AVCONSULTING 0 Posted February 20, 2004 The largest CCTV distributor in the U.S. is ADI. After that Tri-Ed and probably Alarmax. That doesn't mean you'll get the best pricing from them. Often you can find a smaller local distributor who specializes in CCTV that can get better deals. What area do you live in? Regarding picture quality of PC Based vs Standalone, that depends on whether your friend is referring to playback quality or viewing quality. A standalone will usually have better viewing quality since they are passing through baseband video signals to a conventional CCTV monitor. If you put a PC based side by side with say a Kalatel or DM you'll notice the embedded system looks better. Playing back is a toss up depending on the PC card you are using. Normally PC based systems compress the video more tightly than an embedded. This is good and bad. The good part is you can usually record two to three times as much video using a PC based as you can an embedded. You won't get as good of a playback though as the embedded. So there is a big trade off in picture quality vs amount of time you can record on a given hard drive. This is a decision your customer will have to make. Never any easy decisions when it comes to digital recording. Luckily there are people versed in both PC based and embedded systems on this forum who can give you their opinions on actual installations. Share this post Link to post Share on other sites
squale 0 Posted February 20, 2004 I live in New Jersey. Right now I need to decide on what type of card to get... Looking at the Geovision GV-250 card, it only says that it does 20 frames per second NTSC. Now tell me, is that really only 20fps or is it 30fps? I thought the LOWEST these card chips could give you is 30fps NTSC?? Share this post Link to post Share on other sites
rory 0 Posted February 20, 2004 I live in New Jersey. Right now I need to decide on what type of card to get... Looking at the Geovision GV-250 card, it only says that it does 20 frames per second NTSC. Now tell me, is that really only 20fps or is it 30fps? I thought the LOWEST these card chips could give you is 30fps NTSC?? no most all DVRs/Muxes, etc, split it up, its the current technology. As you add more cameras, it gets less per camera. Share this post Link to post Share on other sites
squale 0 Posted February 20, 2004 I live in New Jersey. Right now I need to decide on what type of card to get... Looking at the Geovision GV-250 card, it only says that it does 20 frames per second NTSC. Now tell me, is that really only 20fps or is it 30fps? I thought the LOWEST these card chips could give you is 30fps NTSC?? no most all DVRs/Muxes, etc, split it up, its the current technology. As you add more cameras, it gets less per camera. yes so you are saying that if in total the card only puts out 20fps if I have 4 cameras hooked up I am ONLY looking at 5fps... OUCH... Share this post Link to post Share on other sites
rory 0 Posted February 20, 2004 for recording, yes. 5pps is fine for most retail depends on how many cameras are connected, etc. Set up the pps and record, then playbackl and see if it is what you can live with. If not, makee it faster, or slower. NOTE: multiplexed video is never real time. check out these for an example of different playback speeds & camera numbers, these being on a 60pps single channel stand alone kalatel DVR. http://www.bahamassecurity.com/ms/shockwave.asp Share this post Link to post Share on other sites
rory 0 Posted February 20, 2004 for real time recording, you will need 1 DVR for each camera, like how casinos do it with VCRs, they have 1 VCR for each camera, so if they have 1000 cameras, they have 1000 VCRs,that pop out every 4-6 hours, and tapes are changed and archived. Rory Share this post Link to post Share on other sites
AVCONSULTING 0 Posted February 20, 2004 Rory is right about 5 fps being more than adequate for most recording situations. Unless you have some very special recording need such as gambling, or high value small merchandise like jewelry. If you can get a real GeoVision GV-250 for $75 then it is a great price. GeoVision has some really great features and is probably one of the best cards for the money. Share this post Link to post Share on other sites
