Dahua DVR FAQ

Dahua DVR FAQ
From User Manual V2.606
1. DVR can not boot up properly.
There are following possibilities:

• Input power is not correct.
• Power connection is not correct.
• Power switch button is damaged.
• Program upgrade is wrong.
• HDD malfunction or something wrong with HDD ribbon.
• Seagate DB35.1，DB35.2，SV35 or Maxtor 17-g has compatibility problem. Please upgrade to the latest version to solve this problem.
• Front panel error.
• Main board is damaged.


2. DVR often automatically shuts down or stops running.
There are following possibilities:


• Input voltage is not stable or it is too low.
• HDD malfunction or something wrong wit the ribbon.
• Button power is not enough.
• Front video signal is not stable.
• Working environment is too harsh, too much dust.
• Hardware malfunction.


3. System can not detect hard disk.
There are following possibilities:


• HDD is broken.
• HDD ribbon is damaged.
• HDD cable connection is loose.
• Main board SATA port is broken.


4. There is no video output whether it is one-channel, multiple-channel or all-channel output.
There are following possibilities:


• Program is not compatible. Please upgrade to the latest version.
• Brightness is 0. Please restore factory default setup.
• There is no video input signal or it is too weak.
• Check privacy mask setup or your screen saver.
• DVR hardware malfunctions.


5. Real-time video color is distorted.
There are following possibilities:


• When using BNC output, NTSC and PAL setup is not correct. The real-time video becomes black and white.
• DVR and monitor resistance is not compatible.
• Video transmission is too long or degrading is too huge.
• DVR color or brightness setup is not correct.


6. Can not search local records.
There are following possibilities:


• HDD ribbon is damaged.
• HDD is broken.
• Upgraded program is not compatible.
• The recorded file has been overwritten.
• Record function has been disabled.


7. Video is distorted when searching local records.
There are following possibilities:


• Video quality setup is too low.
• Program read error, bit data is too small. There is mosaic in the full screen. Please restart the DVR to solve this problem.
• HDD data ribbon error.
• HDD malfunction.
• DVR hardware malfunctions.


8. There is no audio when monitor.
There are following possibilities:


• It is not a power picker.
• It is not a power acoustics.
• Audio cable is damaged.
• DVR hardware malfunctions.


9. There is audio when monitor but there is no audio when system playback.
There are following possibilities:


• Setup is not correct. Please enable audio function
• Corresponding channel has no video input. Playback is not continuous when the screen is blue.


10. Time display is not correct.
There are following possibilities:



• Setup is not correct
• Battery contact is not correct or voltage is too low.
• Crystal is broken.


11. DVR can not control PTZ.
There are following possibilities:


• Front panel PTZ error
• PTZ decoder setup, connection or installation is not correct.
• Cable connection is not correct.
• PTZ setup is not correct.
• PTZ decoder and DVR protocol is not compatible.
• PTZ decoder and DVR address is not compatible.
• When there are several decoders, please add 120 Ohm between the PTZ decoder A/B cables furthest end to delete the reverberation or impedance matching. Otherwise the PTZ control is not stable.
• The distance is too far.


12. Motion detection function does not work.
There are following possibilities:


• Period setup is not correct.
• Motion detection zone setup is not correct.
• Sensitivity is too low.
• For some versions, there is hardware limit.


13. Can not log in client-end or web.
There are following possibilities:


• For Windows 98 or Windows ME user, please update your system to Windows 2000 sp4. Or you can install client-end software of lower version. Please note right now, our DVR is not compatible with Windows VISTA control.
• ActiveX control has been disabled.
• No dx8.1 or higher. Please upgrade display card driver.
• Network connection error.
• Network setup error.
• Password or user name is invalid.
• Client-end is not compatible with DVR program.


14. There is only mosaic no video when preview or playback video file remotely.
There are following possibilities:


• Network fluency is not good.
• Client-end resources are limit.
• There is multiple-cast group setup in DVR. This mode can result in mosaic. Usually we do not recommend this mode.
• There is privacy mask or channel protection setup.
• Current user has no right to monitor.
• DVR local video output quality is not good.


15. Network connection is not stable.
There are following possibilities:


• Network is not stable.
• IP address conflict.
• MAC address conflict.
• PC or DVR network card is not good.


16. Burn error /USB back error.
There are following possibilities:


• Burner and DVR are in the same data cable.
• System uses too much CPU resources. Please stop record first and then begin backup.
• Data amount exceeds backup device capacity. It may result in burner error.
• Backup device is not compatible.
• Backup device is damaged.


17. Keyboard can not control DVR.
There are following possibilities:


• DVR serial port setup is not correct
• Address is not correct
• When there are several switchers, power supply is not enough.
• Transmission distance is too far.


18. Alarm signal can not been disarmed.
There are following possibilities:


• Alarm setup is not correct.
• Alarm output has been open manually.
• Input device error or connection is not correct.
• Some program versions may have this problem. Please upgrade your system.


19. Alarm function is null.
There are following possibilities:


• Alarm setup is not correct.
• Alarm cable connection is not correct.
• Alarm input signal is not correct.
• There are two loops connect to one alarm device.


20. Remote control does not work.
There are following possibilities:


• Remote control address is not correct.
• Distance is too far or control angle is too small.
• Remote control battery power is low.
• Remote control is damaged or DVR front panel is damaged.


21. Record storage period is not enough.
There are following possibilities:


• Camera quality is too low. Lens is dirty. Camera is installed against the light. Camera aperture setup is not correct.
• HDD capacity is not enough.
• HDD is damaged.


22. Can not playback the downloaded file.
There are following possibilities:


• There is no media player.
• No DXB8.1 or higher graphic acceleration software.
• There is no DivX503Bundle.exe control when you play the file transformed to AVI via media player.
• No DivX503Bundle.exe or ffdshow-2004 1012 .exe in Windows XP OS.


23. Forget local menu operation password or network password
Please contact your local service engineer or our sales person for help. We can guide you to solve this problem.

DVR And Static IP

I am trying to access my dvr from a remote location, COX gave me a static ip and subnet mask and the same gateway that the modem uses but now running through a linksys router, I can access the DVR thru the intranet (192.168.1.2) but not with the static ip they gave me... the dvr has only one port (80) set , is there something I need to do in router settings to make it viewable over the internet??

You, you have to change some settings in the Linksys router. The Linksys router has only one WAN port, the port that connects you to the internet. All the other ports are behind the router integrated firewall. Therefor, you have to forward port 80 to your DVRs ip address.

Proper setup for the dvr is not port 80. It should be another port like 7000. You do not apply your provider static ip here. The dvr gets private static ip. You configure the router to forward to that private static ip on port 7000. You access the dvr remotely by putting in the wan ip and the port number in this format wanipaddress:port To access it internally you put privateipaddress:port

Assuming your lan ip is 192.168.1.x with gateway 192.168.1.1 You would start with your routers dhcp scope. I would suggest setting it to start at 192.168.1.11 to 254. This leaves you 10 ips to use statically. Next you go to your dvr and set its ip as static 192.168.1.2 255.255.255.0 with gateway 192.168.1.1 You change the port from 80 to say 7000 [you don't want to use 80 for your dvr] Save the settings. Test the settings by going to your computer and in IE [or whatever you are using] type in the address bar 192.168.1.2:7000 [note the colon : ] and hit enter. You should have the dvr web interface come up. Now you move on to external to your network access. Go back into the router and port forward to 192.168.1.2 listing the port 7000. Save the router settings. Go to the status page or wan interface and write down the wan ip your router presently has. Now from a outside of your lan pc [friends house or internet cafe] put into IE that wan ip and port number just like you did when on the lan but replace the lan with wan ip wanipaddress:7000 for example. You should once again get the dvr interface.

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BDXL

BDXL

The BDXL format supports 100GB and 128GB write-once discs and 100GB rewritable discs for commercial applications. It was defined in June 2010.

cctv in kerala

Sony launches six new DVRs, all write to BDXL and play back in 3D

Sony launches six new DVRs, all write to BDXL and play back in 3D

Well, Sony is a little late to the party on this one, two days behind Panasonic announcing six new BDXL-writing DVRs. But, the company is definitely still on the BDXL bleeding edge, announcing its own suite of six devices, ranging from 320GB to 2TB of internal storage and all but one offering dual tuners. When those tuners have filled that storage they can all write to 100GB BDXL discs, which we'll remind you one more time are not backwards compatible with current Blu-ray players. Finally, all six of them support 3D playback, because if you're already jumping on the BDXL bandwagon you surely have your 3D HDTV well and truly dialed in by now. Sony isn't saying just how much these six will cost, but the premium model with 2TB of storage ships in Japan on September 25. For the rest you'll have to wait until October 22.

Akihabara News Sony

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CCTV in kerala

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we also deals with all type of office automation works

Our Services

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  CCTV Cameras

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Setting up explorer for remote viewing

Infrared Security Camera

An infrared security camera has infrared LED lighting (light from a different region of the electromagnetic spectrum than we normally use to see) installed around the outside of the lens of the camera. This lighting allows the camera to capture a good image in no light at all. With a little bit of light (called low light) the infrared camera can capture a picture that looks just like daytime. People use infrared security cameras for businesses that have the lights out at night (in case of break-ins). Or for outside, nighttime viewing. Keep in mind that even at nightime there is a normally some light from the moon, stars, or street lights.

Infrared cameras are often called "Night Vision" cameras because they can 'see' at night. However, do not confuse "Night Vision" with "Day / Night Cameras". Day / Night cameras do not have infrared lights built in. More about those types of cameras below.

Infrared security cameras will provide a color picture while the light is good. When it gets dark, the camera will switch to infrared mode and illuminate it's built-in infrared LEDs. In infrared mode the image is captured in black and white - this is true of all infrared cameras. The level of light required to capture a good picture is referred to as a camera's lux, the lower the lux the better the camera can see in low light. For example a camera with 0.003 lux is better than a camera with 0.2 lux. Infrared cameras are considered to be 0.0 lux in infrared mode - in other words they can 'see' with no light at all.

Infrared cameras are also compared by how far they can see in total darkness. This is generally a result of how many infrared LEDs are built into the camera. Our 600 Line Color Outdoor Infrared Varifocal Bullet Camera can see up to 125ft. with no light at all!

If you are going to use an infrared camera outdoors, its best to use a outdoor weatherproof bullet style camera. This is because if you use an indoor infrared camera and need to put it in an outdoor housing, sometimes the infrared light reflects off the glass of the housing. Some people get acceptable results if the camera is absolutely flush up to the glass thereby reducing the glare. An alternative solution is to use a day / night camera which has an extra sensitive imaging chip that allows it to capture a good picture in low light situations without using infrared lighting. This works well for example if there are street lights outside or an exterior light that can be left on at night. Keep in mind that cameras without infrared lighting will not capture an image with zero light. The other issue to consider is that infrared cameras require more power (more amperage). The power requirements are provided in the specs for each camera.

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Optimization of CCTV camera settings

Optimization of CCTV camera settings

 

Introduction

When selecting a model of a camera we are usually interested in possibility of adjustments to various operating conditions. Of course, more advanced models have more capabilities, simpler devices keep some parameters fixed.
However, in order to be able to take full advantage of the adjustments, please refer to their technical data and user manuals. We here are discussing a number of typical settings having an impact on the quality of the image, both positive and negative. Such knowledge will help you achieve the best practical results of the camera operation.
The impact of changes in camera settings will be demonstrated for ACTI cameras, but the rules apply to other types of cameras from different manufacturers.

Resolution

The main parameter which describes image quality is its resolution. It says about how many points the whole image consists of. Of course, the larger the resolution, the better the image quality or larger area that can be monitored. In contrast, it creates a greater demand for bandwidth and increases the volume of recorded material. Typical resolutions: CIF (320 x 240), VGA (640 x 480), D1 (720 x 576), SXGA (1280 x 1024), UXGA (1600 x 1200).

Comparison of VGA and SXGA resolutions

Frame rate

The parameter specifies how many frames are generated/transmitted in a unit of time - the more frames the smoother image. PAL television system has adopted 25 frames per second (fps), which is regarded as completely smooth image. However, due to bandwidth restrictions, video surveillance systems often use in practice frame rates 5 to 10 fps, which are quite sufficient. Of course, there are specific cases that require to use high frame rates, even 100 fps, but such solutions are not popular. Lower frame rates are used to control crowds, higher (25 fps) to monitor the behavior of individuals, the highest to record quick processes (e.g. crash tests).

Compression

A very important feature of IP CCTV camera is the kind of video compression. It shows technological level of the camera. The better compression, the lower bandwidth requirements - at the same level of subjective quality. Popular video compression formats are MJPEG (in fact linking consecutive frames compressed as JPEG files) and MPEG-4 (creating complete images one every several frames and refreshing them till the next complete frame only by the changes). The latest and most advanced compression method is H.264 (MPEG-4 Part 10, or MPEG-4 AVC), a block-oriented motion-compensation-based codec standard. It contains a number of new features that allow it to compress video much more effectively than the previous standards, such as multi-picture inter-picture prediction and lossless macro-block coding. In practice, the "gain" of H.264 in comparison with MPEG-4 ASP (bandwidth, file size, or transmission time) is about 30%.

Comparison of popular compression formats at a given quality

Video settings

ACTi cameras have Video Settings menu that enables the operator to set parameters associated with network transmission: resolution, frame rate, compression method, serial and network port settings.

Screenshot of video settings menu of ACTi cameras

Back Light Compensation (BLC)

This function is the ability of a camera to compensate the brightness of the subjects with a large amount of background light that would make it practically impossible to see any details of the subjects. Backlight compensation consists in adjusting the gain of the camera to improve exposure of the subjects that are in front of a bright light source. It allows to identify the foreground. Unfortunately, the background also becomes even brighter.

BLC off	BLC on

Wide Dynamic Range (WDR)

This feature of image sensors has been introduced relatively recently. It extends the action of BLC. Due to operation based on the analysis of exposures of single cells, at the same time it can brighten dark elements and darken too bright ones. The image processed this way allows to clearly see details both in the foreground and bright background.

WDR on

White Balance (WB)

This is a function that influences representation by the camera all the colors, in reference to "white" color. In automatic mode, the reference point for white is the brightest point in the image. Because the camera often monitors an area where the brightest point isn't really "white", the colors in the image can be far from those we consider "real". The solution is to preset colors corresponding to natural or artificial lighting, as well as to save camera settings for a "white" pattern.

Correct white balance	Incorrect white balance

Automatic Gain Control (AGC)

This allows an increase in sensitivity, enabling operation in lower light conditions. However, it should be borne in mind that with the strengthening of the signal, the noise is amplified as well. So the AGC level has to be set carefully, on a trial-and-error basis.

AGC at 10/255	AGC at 100/255

Automatic Electronic Shutter (AES)

The possibility of extending the time of opening the shutter allows to increase the exposure of the image sensor. This is a very useful feature in areas with low light, since a longer exposure time results in a brighter image. However, it is not free from drawbacks. The problem is blurring of moving parts of the image. This is due to the fact that the objects move significantly during the period of opening the shutter, being reproduced all the time. Another important limitation is the frame speed of the camera - the opening time cannot exceed the frame time.

Short shutter interval	Long shutter interval

Sharpness

JPEG compression has a disadvantage - it generates blocks with undesirable texture. This causes strange patterns in the picture. The effect is particularly visible in dark scenes. The solution to this problem is to reduce the sharpness of the image. Reducing this parameter, you can smooth out the "noise" caused by the compression. Of course, too big reduction would result in a blurred image.

Sharpness at 200/255	Sharpness at 100/255

Camera settings

All the settings described above can be found in Camera Settings that allow to adjust parameters of the image. 

Screenshot of Camera Setup in ACTi cameras

Summary

Modern IP cameras offer many options for adjusting to operating conditions. The mechanisms used in the devices allow them to work in almost all environments. The image quality obtained depends also on the skills of the installer. Please note that the manufacturer presets the parameters to some default conditions that are typical for a specific model. In actual conditions the installer can improve the picture quality. However, it happens in some cases that inexperienced installer worsens the image from the camera to a degree that he may suspect the device is broken. So, if the default settings are satisfactory, there is no need to "experiment". In any case, the changes of the parameters should be made very carefully.

 

What is CCD chip?

A CCD(charge coupled device) consists of several hundred thousand individual picture elements (pixels) on a tiny 1/2", 1/3", or 1/4" chip. Each pixel responds to light falling on it by storing a tiny charge of electricity. The pixels are arranged on a precise grid, with vertical and horizontal transfer registers carrying the signals to the camera's video processing circuitry. This transfer of signals occurs sixty times per second. The 1/3" CCD chip is the most widely used sensor format these days; its size is 5.5mm (diagonal), 4.4mm (horizontal) and 3.3mm (vertical). The 1/4" sensor format, recently being used in color cameras, is 4mm (diagonal), 3.2mm (horizontal) and 2.4mm (vertical). The CCD chip's electronic shutter plays a major role in making a fantastic and reliable picture. * CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor) image sensors are two different technologies for capturing images digitally. Each has unique strengths and weaknesses giving advantages in different applications. www.meowglobal.com

What is Electronic Shutter?

Electronic Shutter, one of the major features of CCD camera, is not really a moving shutter, but a clever piece of signal processing. Under low light conditions, the CCD is allowed to gather signal at the electronic shutter speed of full 1/60th of a second. Under brighter lighting conditions, the video processing chip automatically responds by reading the CCD and then immediately "early purging" it, resulting in precise control over the video level. Even at a shutter speed of 1/100,000th of a second, the CCD camera is still delivering 60 images per second, but each image is gathered over a much shorter period of time. It doesn't end with the CCD...the image is constantly monitored and optimized by advanced on board signal processing circuitry. The end result is a fantastic picture, with no fiddling, no adjustments, and best of all, unbelievable reliability.


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Advantages Of H.264 Over Other Formats

h.264
Better compression and lower file size than mpeg4, but the iPod's processor can only play videos encoded with h.264 up to 320x240 and 768kbps/sec (I've read that h264 is processing power hungry). And, I've read several threads that say h264 takes longer to encode. So I assume h.264 is good for videos that will only be played back on the iPod itself.

mpeg4
Worse compression and higher file size than h264 but the iPod can play mpeg4's that have been encoded with a larger resolution and higher bitrate...and again, am assuming this has something to do with mpeg4 requiring less processing power than h.264 hence the iPod being able to handle mpeg4's with higher resolution and bitrate than h264


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Video Compression and Transmission Terms

Term	Definition
Bandwidth	Its popular meaning refers to the amount of data that can be transmitted per second over a wire or network. When it comes to video surveillance applications you need a high amount of bandwidth to transmit the large files. For remote viewing, 56K modems will not work well. DHL is OK, and cable modems or T1s (or better) are best. And you also want the best video compression you can afford to make the files as small as possible.
CIF	Common Intermediate Format - a set of resolutionstandards used in video applications, defined as follows: FCIF = 352 x 288 ('Full CIF' or just 'CIF') QCIF = 176 x 144 ('Quarter CIF') SQCIF = 128 x 96 ('Sub-quarter CIF') 4CIF = 704 x 576 ('4 times CIF')
CODEC (aka "Code-Decode" or "Compression-Decompression")	A term referring to any technology used to compress and decompress large files such as audio and video files for efficient data transfer.
Compression Standard (or compression algorithm)	A standard approach or 'formula' for compressing (and decompressing) data (in our case, video and audio data). There are many standard image or video compression algorithms available today (many are described below) and new ones come out each year.
D1	D1 is a video resolution standard. In NTSC it is 720 x 480 pixels. Its affect on video compression and transmission is due to the fact that the excellent resolution of a D1 image produces larger files to be compressed and transferred.
H.264 Compression (aka MPEG4+ or MPEG4-Part 10 or AVC (Advanced Video Coding))	The latest MPEG4 compression technology, released in 2003. H.264 provides excellent video compression. You get the same quality image as MPEG4 even at the higher resolutions like full screen D1.
ISO (aka International Organization for Standardization)	ISO is an international organization founded in 1946 that organized and reviews standards worldwide. Their members such as ANSI (American National Standards Institute) and OSI (Open Systems Interconnection) create the standards and they review them for completeness and other criteria. ISO is not an acronym; the name derives from the greek word iso, which means equal.
lossy compression	Sometimes a compression algorithm will lose some detail of the original image in its compression of that image. An algorithm that loses some detail of the original image is called a 'lossy compression' algoritm. JPEG, for example, is considered to be a 'lossy' compression.
NTSC	National Television Standards Committee - the analog video representation standard used in the US and South America. Compare to PAL
PAL	Phase Alternating Line - the analog video representation standard used in Australia, and most of Europe and Asia. Compare to NTSC.
JPEG compression (aka Joint Photographic Experts Group)	A standard format for image compression (defined by the group who gave it its name) It was first introduced around 1986 and is a very common image format used on the web. JPEG is only used for photo (single frame) images (not video). JPEG is a 'lossy' image format - some of the detail of the image may be lost in its compression.
JPEG2000 compression	An update to the JPEG compression standard. Released in 2000, this standard offers both lossless and lossy compression and provides much better image quality at smaller filesizes than JPG does. File extension is ".jp2".
MPEG compression (aka M-JPEG or "Moving Picture Experts Group")	A standard format for video compression first introduced around 1988. MPEG achieves high compression rate by storing only the changes from one frame to another, instead of each entire frame. Although MPEG is lossy compression, the loss of image detail is generally imperceptible to the human eye except at the highest resolutions. MPEG has gone through several revisions as follows:  MPEG or MPEG-1 - The original MPEG, produces image quality similar to a conventional VCR MPEG-2 - used in DVDs MPEG-3 - there wasn't one MPEG-4 - combines MPEG-2 and Apple's QuickTime technology (see below for more details)
MPEG4 compression (aka MPEG-4 or H.263)	MPEG4 was standardized in 1998 by the ISO and combines MPEG-2 and Apple's QuickTime technology. This resulted in a nice clear picture but also compressed much better than previous technologies.
MPEG4+ compression (aka H.264)	The latest MPEG4 video compression technology. See H.264compression for more information.
proprietary compression algorithm	This refers to a compression algorithm that does not follow one of the compression standards such as MPEG4. Many times a proprietary algorithm will follow a standard mostlybut then tweak it in some specific way. The result may be a better (more efficient or better quality) compression but the downside is that since it uses a proprietary formula it may not be compatible with other products. Many DVRs and IP systems will use a proprietary algorithm within their product (for example to store the images to the hard drive) but provide interfaces in standard formats to communicate with other systems (for example when backing up a particular video event to a DVD).
Resolution (or Resolution Standard)	Resolution is a measurement of the quality or level of detail of an image. Usually expressed in terms of pixels, dots, or lines per inch.CIF and D1 are examples of some standard resolutions. The higher the resolution is, the greater the detail and number of pixels in the image will be, and also the larger the resulting video file will be.
Run Length Encoding (RLE)	This is a very simple form of data compression in which sequences of the same data value which occurs in many consecutive data elements are stored as a single data value and count, rather than as the original sequence.

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