fifi11

Chinese sellers have sent me a short D1 upsampled video . Actually it is ok to recognize someone's face at 2/3 meters . Quality is pretty good and the price low . In comparison with the 380 tvl cctv camera with CIF videos encoding I've used , it is far better .

Hi, I have contacted the chinese usb dvr seller and they all acknowledge that the dvr uses upsampling . Can someone tell me about D1 upsampled video quality in comparison with D1 and CIF . Is it worth using 520 tv lines cameras with an upsampler ? Thanks for your advices , Cédric

Hi yakki , Well chinese manufacturer seem to have a lot of imagination ... I wouldn't have thought at that ! One of the dvr I may be interested is this one http://www.estcctv.com/digital-video-recorder/digital-video-recorder-es-u608 The brand is eye sight , does someone knows this one ?

Hi, Does someone know about chinese usb D1 dvr quality like this ones http://cgi.ebay.fr/4-Channel-Super-USB-DVR-Video-Audio-Real-time-Network-CCTV-Capture-Card-100FPS-/260928471710?pt=US_Surveillance_Digital_Video_Recorders_Cards&hash=item3cc08c829e#ht_5947wt_1004 or this one http://www.made-in-china.com/showroom/kasselectronic/offer-detailBoXmzAKvfHke/Sell-USB-DVR-with-8-Channel-Real-Time-200fps-.html ? Thanks

I have looked closer to the specifications of the pinhole camera: it has 380 tv lines and 2.2mm focal length . With this camera, the quality of image is ok when the person is close enough , when the object is further it gets more difficult to distinguish someone's face . Maybe it's a problem of image resolution, or also of focal length , I don't know . I'd like the spy camera to be able to focus clearly on someone's face from 3 feet to 10 feet . What focal length should work for that ? Thanks

Simple in any conversation whether with Tried , ADI, any online store when we talk about Analog camera TV Lines of resolution we ALWAYS refer Hor resolution ( which is number of vertical lines) and you are the first who should know this you are welcome to call me and "argue" Hi ak357, Actually, I don't understand neither why the number of tv lines would equate more or less the horizontal definition, that I think is the number of pixel on a horizontal line . I thought the horizontal definition would be the number of vertical lines and the vertical definition the number of horizontal lines . In a 1024x768 display, 768 is the vertical definition and number of horizontal lines, isnt'it ? Thanks for your explanations

Hi , thanks for your answer ! When you say 560 tvl, does a 720 x 576 PAL camera would be ok ?

Hi, I am interested in a D1 1 or 4 channel dvr , that does D1 encoding ( 704 x 576 PAL ) I already have two 352x288 PAL cameras and wonder wether recording will be possible with this DVR , more generally can I use any HxV PAL cameras as slong as H is less than 704 and V less than 576 ? Thanks for your help !