aurmol

I tried all combinations. The Mail can't work. Anything I missed? SMTP Server: smtp.mail.yahoo.com Port: 465 (or 587 for secure) Anonymous: Blank User Name: (my email user name without @ and with tested) Password: (email password) Receiver (any email.. what should I put.. I tried different ones) Sender (any email... what should I put.. I tried different ones) Subject: (blank) Attachment (check or uncheck tested) Encrypt Type: NONE Event Interval: 120 Health Enable: Blank Interval: 60 Test: Mail Test Error always appear in the TCP-IP. Preferred DNS is 8.8.8.8 and Alternate DNS is 8.8.4.4 In the router isp DNS.. they are all zero someone was said to solve it by the the DNS entry, but there is none in my isp router. So what should I change it into. Any other clue how to make it work? Did yours work? What exactly did you put above?

In the dahua "Add Device".. there is a Register ID option.. this doesn't require you to do port forwarding and add DNS server to be able to remote access it.. what is the generic term of this technology? How does it exactly work? Is the serial number like some kind of DNS stored in the manufacturer servers? Many newer NVR/DVR hasvethis capability..

I've been using PSS the past 2 months and the only thing I can't figure out is the PC-NVR inside it. I can adjust its setting but where and how do you play back the recorded contents? Been figuring the past 3 hours and 2 months and still no clue. Thanks.

Hi, I have this Dahua recorder with built in POE with address 10.1.1.1. The 2 cams also made by dahua connected fine. But an external other brand camera connected to external router with 192.168.1.1 can't go online. Should the external router ip be set to 10.1.1.1 also? A separate question. Supposed there are 2 internet broadband access points connected to your network (I only have one but just asking in case there are two) and there is one dahua recorder with P2P access. When you access it remotely.. which of the 2 broadband access points would it use? is it random or how does it choose? Thank you.

Because the external router uses 192.168.1.1. Should I set it to 10.1.1.1? A separate question. At night in one of the dahua cameras. I need to set it to night mode so IR will turn on.. because it is still in colors even though the sides are dark. Is it possible to set the NVR so that at certain time, the night mode IR is enabled? You can't connect your camera like that. You will have to connect it directly to the nvr. I'm not sure about the night vision being turned on automatically. Let's say the dahua NVR has 8 channel but only 4 built in poe ports. You'll need a separate external router. My question is whether the router can be 192.168.1.1 and camera connected to it be 192.168.1.* and the internal poe switch 10.1.1.1.. so can these separate ip be mixed.. thanks.

Because the external router uses 192.168.1.1. Should I set it to 10.1.1.1? A separate question. At night in one of the dahua cameras. I need to set it to night mode so IR will turn on.. because it is still in colors even though the sides are dark. Is it possible to set the NVR so that at certain time, the night mode IR is enabled?

The ip configured is 192.168.1.4 and default gateway is 192.168.1.1 the internal switch setting is 10.1.1.1 so from experience you can mix cameras of different ip addresses? In the p2p recorder that is hard to connect.. what is the numbers of cameras connected? I have only use up to 4 channels but never have experienced with using more than 4.

but the other brand camera (jovision) won't go online when connected to a router with address 192.168.1.1. Should I set the router to 10.1.1.1 (just like the other dahua connected to the internal ip) too? or should 192.168.1.1 theoretically work? Well. I have to use 2 dahua NVR- 4 channel each because a single 8 channel NVR may really be saturated. Connection takes long in either but at least it still loads up. Why how many times longer did your clients experience in connecting p2p?

It was ages ago when I was using 5mp camera.. at that time I seemed to remember that you get more dramatic increase in resolution going from 800x600 to 2Mp. I forgot how much better when you get 5mp versus 2Mp.. practically. If Ip cams are justified over hdcvi/hdtvi/ahd.. it is the resolution. Also reviews said aptina sensor has greater dynamic range than sony exmor.. who here has reviewed or checked out the only dahua 5mp bullet cam.. http://www.dahuasecurity.com/products/ipc-hfw5502c-711.html Is it an aptina or exmor or others? how does it behave and image quality? Or maybe we should wait for the 4K (8 megapixel) if the increase not so significant? My cellphone has 12mp and nokia cellphone has 40mp.. so cctv resolution is like reminiscing memories decade ago...

The most logical is they default the exposure to 1/30 (even if it's on auto) at all low light targets to avoid motion blur. So instead of the 2Mp setting of the 3Mp needing more exposure (they just set it to 1/30). This explains all the noises of the 2Mp. By the way. The same S/N noise is present in the HD-CVI camera I tried before too. So at low light, it uses 1/30 instead of say 1/10.. to avoid motion blur. Maybe the S/N in the sensor not so efficient that is why not enough signal and requiring slower exposure. That said. I'd move over all this cctv now and go back to this years later when dahua produce a 12mp with incredible low light performance (if this wil exist at all in small sensors... maybe someday when adaptive optics with quantum entangled detection methods (like how the robin birds use quantum entanglement in their retinas to see magnetic fields) are used to make those tiny sensors perform like DSLR).

to continue above, the following is what occurred when the dahua 5mp and its 1080p setting (in red rectangle) is overlap transparently (just learnt this trick from Maxicon.. thanks and sorry for the off topic).

I tried the trick in the 4300s. The 2MP and 3MP images are directly taken from the sensor. But I've been thinking of something since days ago when comparing the noise. And you mentioned the issue when you said "note the exposures are different due to the different FOV". In the camera. Do they use separate light exposure sensor for the whole image or pixel by pixel? Because if it's pixel by pixel, the light should be the same no matter what part of the sensor you take the images (whether 2mp or 3mp). Yet in the noises comparisons I did. I noticed the reason the 2mp version of the 3mp 4300s is noisier is because they use the same exposure for both even its in auto... let's say 1/30. Because the noise present are light exposure noises, not compression noise (I studied the difference between S/N vs compression artifacts). So if I adjust the exposure of the 2mp version to make it say 1/25, the noises are better or almost equal to the 3mp. But at that time I figured exposure shouldn't vary with fov because the same pixel in the sensor pick up the same light (remembering the images on the lens sides go to the sensors at the sides.. so you just get the images of the sensor at center, the light should be the same). Btw.. trying the transparent trick (which I just learnt to do after years of using image editing), I found out the 1080p version of the dahua 5mp are directly taken from sensor, that is why the field of view is just one half, while that of 720p are compressed smaller from the original image (with D1 they took the center image and make it smaller). The 3mp version of the 5mp are taken directly from sensor with about 10% increase so the field of view is still half of the 5mp. I see more details at night in the 3mp 4300s than the 5mp that was why I returned it (let's ignore the 5mp for now as we focus on the exposure vs fov mystery). Thanks.

After numerous hours of testing. This is my finding. At daytime at 1/500 shutter.. 3mp and 2mp in the 4300s is almost indistiguisible. But indoor at 1/30 shutter speed, there is more noise (artifacts) in the 2mp setting of the 3mp. I think the explanation is this. When they do direct sampling of the 2mp (1080p) resolution of the 3mp full sensor. Do you think they just enabled the sensor pixels at the center (the 1080p part) or all of it? It's more likely they sample the entire 3MP then crop it in software to 2mp (1080p) but during the cropping and saving it.. there is more compression introduced resulting in more noise. I did dozens of saving and comparisions indoor. I can't share sample images now because they are on private property but anyone can try them (and to those who do.. please confirm it). Thanks.

MaxIcon. Any ideas why there are more noises in the 1080p setting of the 4300s than its 3MP resolution?

I have ip cams already and want to buy another cctv for another location. I want to try the Hdcvi or Hd-sdi since I want zero latency for live view. But I heard the Hdcvi is just low bitrate version of the HD-SDI.. and a dahua ip cam is better in quality than its Hdvci offering. Can anyone give a image sample of Hdcvi vs Hd-sdi vs ip? Are Hdcvi really that bad? I can't find an HD-SDI brand with manual alarm output.. so I seem to be stuck with either Hdcvi or another ip (but hate the latency).

Before I got my first camera. I talked to the axis resellers/installers. He said china cameras have missing pixels and his axis cameras worth over 10 times have full pixels. I checked. It's not true. If only he said axis has 10 times better low light or DSLR like sensor signal to noise ratio.. maybe I could think twice. Also they sell the axis to government institutions with unlimited budget by bribing the officials (our country just few hours boat ride from China). He also told me they don't sell NVRs. Anyway. If I can buy a used axis from ebay. Would this run in the dahua or even Hikvision NVRs with full motion detection capability? Or need a computer (or pc based) to run it? Checking Axis website. They don't give sizes of the sensors. Buellwinkle review has it listed at 1/3".. same size as dahua.. but for it to really perform optimum at low light.. it has to be as big as DSLR or about 1 inch sensor.

If you don't care for the input from people who do this kind of work all the time, you do have a few other options: - Buy some different cameras and test them to see the differences for yourself. - Take the salesman's/marketeer's/website's word on which will fill your needs. - Put yourself in the hands of a professional and let them take care of it. The first way is the best way, but takes time, work, and money up front. On the upside, you learn quite a lot about cameras doing this, and don't have to rely on other people's advice. This is how most of the users here have learned about cameras, what works, and what doesn't. The second way is something many people do the first time, then never again. The third way is good if you choose your professional well, but you're paying extra for the years of experience they've gathered following the first path. If you choose poorly, you're back on the second path. 99% of installers in my country just install analog cctv and dvr. IP cams are so rarely used that almost all installers haven't directly compared any dahuas with hikvision. They haven't even hold one as I asked many. Also I live near China. And Axis camera replacement will take a month because it has to come from the US. And the one or two Axis camera importers said their Axis cameras are better because the cheap cameras have bad pixels not working. They don't know the meaning of dynamic range, etc. Poor country.

Ip cams Alarm Output is very useful if it can ring your cellphone like those Gsm alarm system especially if your camera is in unattended remote building or house. I can imagine using a very cheap cellphone and having some kind of mechanical switch touching the call button in the cellphone and Alarm Output moving the switch to make the cell call you. Is there such accessories that can do this? Anyone has ideas?

Just an update. I went to the Samsung service center and have the phone reflashed. Push notification can work now. Apparent some other applications caused conflict in between the two dual sims and some system disturbances. But for ultra security. It seems a separate GSM alarm dialer connected to separate PIR is necessary.. because if the robbers cut off the building power supply.. there NVR can't even send notification.. unless it is put on UPS.. but then you can't hide both NVR, UPS in hidden area to keep them off robbers. And even if UPS functions, they can see the red IR lights in the camera and may even return to you to get the evidence. So gsm dialer with battery backup seems the best solution for instant at the scene police action. But if anyone has other thoughts. Please let me know. In my country. 90% of banks don't have security guards at night. They rely on cctv and mostly analogs. No joke.

After a day of testing trying out all combinations which includes using port forwarding, buying 2nd iDMSS plus in an IPAD and borrowing another Samsung phone and buying 3rd gDMSS installing in that phone and borrowing 3 mobile sims and exchanging them in all kinds of combinations. I determined the problem is in my Samsung phone.. it is a dual sim grand 2. I'll let the service center reflash it and if not successful. Push notification may not be compatible with dual sim Samsung and i'll have to buy another phone. But then. I still need to get a backup GSM dialer.. because the monitored building is a bank and no one to watch it at night. So need to rely on cctv and motion detection and 100% transmission of that signal which GSM dialer can certainly do (and upon live view confirmation will deploy SWAT team to surround the bank building for engaging and apprehension of the bank robbers).

I have 2 units of the same NVR4204. And I have bought the paid android gDMSS with p2p access. I have 1 unit at home to experiment and another at a remote location. While I can view the NVR remotely. Push notification can only arrive if I was at Wifi. If mobile internet. Push notification can't be received. I don't know why. Maybe p2p and push can't be used if mobile uses 3G and not Wifi. But note I can connect to the nvr remotely and adust setting such as enable Push Notification even in mobile internet. But it can't receive it. I also done experiment and have my home nvr (same model nvr4204) in front of me manually triggering the alarm input.. and just the same.. if the phone is in mobile internet. It can't receive it just like the first nvr. Again if I use wifi at home and my remote nvr detect something remotely. I can receive Push notification. If anyone knows the solution to this deep mystery. Please let me know.

Our country mobile isp has bandwidth of less than 3000 Mbps only so they disallow cctv streaming. If you are caught streaming for more than 5 minutes of 800 kbps videos. Your account will be disconnected for one day. Second offense your mobile sim will be terminated. So we can only remote view less than 30 seconds of live feed. Push notification can't work in mobile maybe because they banned it. But wifi can. And wifi only exist at home so when you are outside, the only way the nvr can contact you is by dialing your phone (because email doesn't work either).

I can't find the particular gsm module above after scouting the net for hours.. does anyone know of a cellphone with Alarm In (to be connected to the Alarm Out of the NVR) that can dial preset number when triggered? Alternatively, pls. think of any device that can move when powered with enough torgue that can press the green call button of any cell phone. Maybe a small 12 volts fan that can press it (but this doesn't have enough torgue). My NVR email notification just can't work in all combinations and my push notification cant reach my phone when it is in mobile mode (Push can only get in when cellphone in Wifi mode).. has anyone successfully negotiated Push in gDMSS while in mobile connection?

Did you notice the 3mp ip cams are narrower than the 2Mps (1080p) in the field of view even if the lens are 3.6mm? Why would anyone want to get narrower field of view? It's as if the 4:3 image was taken from the same sensor as 16:9 such as the sides are blackened? for example.. compare http://www.dahuasecurity.com/products/ipc-hfw4200e-509.html to http://www.dahuasecurity.com/products/ipc-hfw4300e-510.html the 1080p model has 88 degree horizontal field of view while the 3mp model has 72 field of view. All rest same including 3.6mm lens. Do both use the same sensor with the 3pm cutting the sides? If not, what sensors do they use? Is this true with all brands like Hikvision, Geovision, Axis, etc for lens of the same focal length (comparing 1080p vs 3mp)? btw.. the 1080p version uses the sony Exmor, while the 3mp uses the aptina sensor.. which can resolve more shadows and details at the grass for example (anyone has tested these)?

The DNS settings in the router do not matter since you have public DNS server(s) configured on the NVR(8.8.8.8 and 8.8.4.4). For gmail settings: SMTP Server: smtp.gmail.com Port: 587 (or 465 for SSL) User Name: your full email address (including @gmail.com) Password: (email password) Receiver (email address to send the alerts to) Sender your full email address (including @gmail.com) Subject: (whatever you want in the subject line...) Encrypt Type: TLS/STARTTLS(if using port 587), or SSL(if using port 465) I have tried every combination imaginable in 2 Nvrs. It just couldn't work. What I haven't tried is plugging the router cable into the built in poe port (default ip 10.1.1.1).. but it can mess up the ip of the router which is 192.168.1.1 I remember someone mentioned email can work by using the poe port.. anyone can clarify all this once and for all?