Standalone WEB cameras for apartments and houses
Camera for home and apartment. Viewing angle 100. Micro SD support up to 64 GB, battery life up to 1.5 hours.
For home use on the market there are a great many different autonomous WEB-cameras with image transmission over the familiar Wi-Fi network. Thanks to the presence of this function, such cameras can be easily controlled remotely from anywhere in the apartment, and in the absence of wires, they can be used as covert surveillance cameras, placing them in a secluded place. Also, using a Wi-Fi camera, you can easily set up remote monitoring by connecting it to a computer and setting up an online broadcast using a suitable program.
Such self-contained surveillance cameras also have a built-in power supply and the ability to install a memory card. The operating time from the internal power source is about 1.5-2 hours. The cost of middle-class devices varies between 4-8 tons.
Portable cameras with memory card recording
For simple needs, say for the need to record some moments from time to time, including in a covert way, there are miniature surveillance cameras powered by an internal battery and recording to a memory card. However, the scope of their application can be quite diverse. both for conducting ordinary or covert observation, and for simply recording various interesting life events.
Mini camera with wide angle lens.
As an example of such cameras, we can cite the devices of the manufacturer Ambertek, which look like a regular flash drive or 3G modem. Let’s analyze one of the new DV135S products. This autonomous camera with a motion sensor has the ability to transfer data over a wi-fi network, and also records on a micro SD card (maximum memory capacity up to 32 GB). This model is small in size. 115 x 25 x 14 mm, and it weighs only 50 grams. Wide angle lens (170 ) the device allows you to cover almost the entire space even in a tight room, and you can shoot in the dark thanks to the built-in IR illumination. The battery life of this miniature device, according to the manufacturer, is 1.5 hours, with a battery capacity of 560mAh. In addition, the camera can conduct surveillance with a connected portable charger, which can increase its operating time tenfold.
The cost today is about 10 tons. R. It is worth saying that the device is made of high-strength plastic and metal, and looks very nice, and has a convenient clIP, thanks to which it can be discreetly placed on a jeans or a bag.
Solving the issue of power consumption and small memory
Standalone camera with memory card recording. Recording time 1 hour.
When buying a stand-alone camera, an important characteristic is the operating time from its own power source. usually this parameter does not exceed 2 hours, so for long-term autonomy you will in any case need to resort to alternative portable power sources. a battery, a portable memory with a large capacity.
In some cases, wind generators or solar panels can be used as alternative energy sources to power the autonomous monitoring system. But in view of the fact that the field of observation based on alternative power sources is only at the beginning of its development, the cost of equIPment will be much higher than usual, and by the way, there are practically no developments in this direction, although this opens up wide opportunities for experiments.
When the device is installed outdoors, a 32 GB SD card (this is the maximum available size of a memory card for all such devices, with the exception of some cases, and it is enough for about 24-30 hours of continuous recording) will not be enough, because even when setting up recording on the movement of unnecessary material will be a lot. Therefore, in cases of outdoor installation, we always recommend creating an autonomous surveillance based on a hard disk recorder, which will be powered by a battery and an uninterruptible unit. over, cameras for street surveillance will require much more.
Autonomous surveillance cameras: selection criteria, types and models
With the growing popularity and availability of surveillance systems, they began to be used almost everywhere. from ensuring control over the activities of employees of large and small enterprises to protecting private territory: an apartment, a country house or a summer residence. At remote sites, the use of conventional cameras is not always possible, since electricity is not widespread in our country.
In cases of such problems with the power supply of the equIPment in the places of its planned installation, it becomes necessary for a non-standard solution to the situation. The only reasonable way out of such events would be the use of autonomous surveillance cameras, which work thanks to a built-in power source. a battery, or a portable external battery or a portable charger. Also, you do not need to connect additional equIPment (recorder, hard disk), because most of these devices are equIPped with a slot for installing an SD or Micro SD card, which will record what is happening.
Among the advantages of such cameras for autonomous monitoring can be noted and ease of installation. they can be easily installed and configured, and not resorting to the help of specialists. They are also easy to operate.
Criterias of choice
Home standalone Wi-Fi camera Falcon Eye FE-ITR1300. The cost
Before buying standalone cameras, it is very important to determine the main technical points on which the choice of one or another device will depend.
Installation site. If you plan to install the camera outdoors, you should choose a model designed for outdoor surveillance, the main difference of which is the anti-vandal and sealed protective case. It will reliably protect the device from the weather and vandalism. It is also necessary to clarify the operating temperature range of the camera, in which it can record smoothly, and select a camera suitable for your temperature conditions. For our harsh weather conditions, it is better to purchase an outdoor autonomous camera with a good waterproof case, which is able to withstand both extreme heat and severe frosts.
Sensitivity and backlight. Also for outdoor use, such a parameter as the sensitivity of the device matrix is important. To conduct observation day and night, it is necessary to select a camera with a photosensitivity of 0.01,0001 lux, and two modes of operation. Color and Black and White. Such cameras automatically switch to black and white shooting mode at nightfall, which ensures acceptable image quality, when, as in the Color version, in twilight conditions, the picture begins to noticeably make noise. For shooting at night, it is necessary to have IR illumination, invisible to the human eye, but well perceived by the camera. Also, an advantage will be the ability to automatically adjust the lens aperture, which will allow you to open or close the aperture, depending on changing lighting conditions in automatic mode.
Resolution. If you need a clear and detailed picture, you should choose a camera with high recording resolution. HD and Full HD. These formats are now used in almost all modern digital cameras, and the recorded content significantly differs from analog devices for the better. Among analog systems, AHD cameras have recently appeared, which also provide high-definition images.
Basic models of autonomous surveillance cameras
The autonomy of cameras can be understood as several characteristics:
- Camera independence from external power sources;
- No need for additional storage devices.
Depending on this, there are 3 model lines of such devices:
- Standalone cameras with an internal power source, the ability to power from a battery or portable memory, and have a slot for a memory card;
- Standalone WEB-cameras;
- Standalone GSM or 3G surveillance cameras that do NOT require internal memory.
Let’s take a closer look at each of THESE groups, find out all the advantages and disadvantages, and also analyze examples of specific camera models.
Autonomous surveillance system using IP cameras
Standalone IP cameras are an excellent choice due to their high recording resolution and low power consumption. only 12V at full power. Today there are many such devices, and analog cameras are gradually becoming a thing of the past.
Standalone IP camera with Link nc326g memory card.
For acquaintance, we will give an example of such equIPment. an outdoor IP camera with the ability to record on a memory card and a 3G modem. Link NC326G-IR. This camera is the best suited for the implementation of autonomous surveillance for a summer residence or a country house, where there is no possibility of connecting to the Internet, if necessary, online broadcast or offline recording on a card. She has very good technical data:
- High resolution. 1280×720;
- Viewing angle 50 ;
- Support for microSD cards up to 64 GB, which will allow continuous recording for 2-3 days;
- Work in GSM networks for offline data transmission (works with all popular operators)
- Infrared illumination with a range of up to 15 meters;
- The maximum power consumption with the IR illumination on is 0.35A (the car battery with a capacity of 190 Ah is enough for more than 10 days of continuous operation of the camera)
- Protection class IP 66. waterproof, dustproof housing.
System power supply. The camera requires 12V power supplies. This issue is easily solved with the help of car batteries, and to stabilize the voltage, you can use an uninterruptible power supply, which will provide protection against increased load and short circuit thanks to fuses.
Camera setup. In order to configure the camera (3G modem operation, remote data transmission, motion detector, and other parameters), you need to insert a SIM card into it, connect the device to a computer and follow the steps described in the instructions. After setting, we disconnect the camera from the PC, and after that it will independently connect to the 3G network, and the registrar for this camera is NOT required.
PrincIPle of operation. This camera does not require a dedicated IP address and a router. to view the image from the camera, install the software from the disk, or, if it is absent, download a free application called AnyScene from the Android market or iTunes. The computer application must be included on the disc with the camera. After installation, it will be enough just to enter the device ID, and if the settings are correct, the image will immediately appear on the screen of your gadget.
With the help of several such devices, it is quite easy to implement autonomous surveillance for a summer cottage by placing cameras and batteries in hard-to-reach places to avoid damage or theft.
SURVEILLANCE CAMERAS with recording
Almost all systems existing today predict the ability to record images from surveillance cameras to a particular device. Let’s take a look at the main ways to create archives.
There are several ways to record information. It can be carried out:
- To a memory card;
- On a USB flash drive;
- HDD.
In the first two cases, the camera can work autonomously. The third option involves connecting it to a recorder or computer.
Analog cameras can only be used in conjunction with a DVR or PC. Thus, in order to organize the recording in this case, building is required “full” surveillance systems.
IP technologies make it possible to implement the recording option in any form, including on the side of the TV camera. Let’s look at each of THESE methods in more detail.
SURVEILLANCE CAMERAS with recording on the MEMORY CARD
This method is used, as a rule, by IP cameras. The depth of the archive obtained in this way is determined by:
- The memory capacity of the card (of course, it should not exceed the values supported by the device),
- Stream rate (depends on the resolution, the method of signal compression, the number of frames transmitted per time unit, the presence of the motion detection function).
For example, to record a 1.2MP image at 12 frames / second in H.264 compression for 1 hour, you need a card with a memory capacity
= 2.2 Mbit / s 3600 s / 8 = 990MB where:
- 2.2. Corresponding bit rate (Mbps);
- 3600. Recording time (seconds)
- 8. Conversion Ratio Bits to Bytes.
SURVEILLANCE CAMERAS with recording on a USB flash drive
At its core, a flash drive is not much different from a CD card. The most significant differences are:
- The maximum possible amount of memory;
- Connector type for connection.
If the memory card can be inserted directly into the camera body, then the flash drive uses the USB connector as a connector. It is usually placed on a flexible conduit outside the surveillance camera body.
Recording from camera to hard drive.
For analog cameras, it can be done using a capture (input) board installed in a computer or digital recorder, that is, a separate additional device is required. The IP camera can be connected directly to the PC, but, in any case, the camera here is NOT a recorder.
Surveillance cameras recording time.
Regardless of the recording method, the storage time is determined by the stream parameters and the capacity of the storage medium: HDD, memory card or flash drive. Considering at the beginning of the article the method of recording to a memory card, I gave an example of calculating the archive depth (recording time).
Recording software.
When using the recorder, a separate program is NOT required. It is contained in the device itself. For input boards Corresponding programs are supplied with the product.
IP cameras can also work with the software supplied with them. In addition, many of them have their own web client installed directly from the camera when it is first connected to a computer.
HOME SURVEILLANCE CAMERA with recording
The first thing to do before choosing a home camera capable of recording is determined by the goals and objectives that you are Pursuing. I constantly mention this, since this moment is decisive when choosing the technical characteristics and options of the device.
Several of the most common options:
- Installation of street surveillance to control the surrounding area;
- Installation of surveillance for observation of children, elderly relatives;
- Controlling incoming workers (I don’t like the word “servant”)
- Purchase of cameras for the purpose of organizing security surveillance.
In the first case, special “delights” not necessary. Therefore, you can install the recorder and connect cameras of any type to it. It should be noted that in this case, you can get a practically unlimited depth of the archive and DO NOT worry that the recording will be interrupted at the most inopportune moment.
For remote monitoring, a camera with support for recording to a card or flash drive will be useful as a way to level the variable speed of the Internet connection. If for some reason the Internet channel is temporarily “fall off”, the information will be saved on the side of the TV camera and when the connection is restored it will be sent to “cloud”.
For some reason, it is believed that the surveillance of incoming workers should be hidden. In this case, I don’t see any particular benefit in using a camera with recording on a built-in media at home. Installing a hidden camera is often more difficult than hiding a recorder. The exception is, again, remote access via the Internet.
If we talk about security, then in this case it is better to use surveillance in integration with burglar alarms. There are enough technical solutions to implement such tasks.
Thus, the use of surveillance cameras with recording for a private house in most cases may be impractical.
Wireless camera hide surveillance with recording
The temptation to use a recording camera for wireless covert surveillance is understandable. Let’s consider the advantages and disadvantages of such technical solutions.
The undoubted advantage, of course, is the lack of wires. This greatly simplifies the hidden installation process. I draw your attention, there are two possible options:
- Use of hidden cameras with the ability to wirelessly transmit data;
- Application of a stand-alone camera that works exclusively “to myself”.
The first option can cause inconvenience to camouflaged antennas and power wires. The use of an autonomous voltage source requires periodic replacement, which is quite inconvenient. A fairly reasonable question arises. why, in this case, write to a memory card or flash drive. There are several arguments in favor of this decision.
First, you can opt out of recording on the side of checkpoints. You can simply periodically remotely view the information on the carrier. If necessary, noteworthy files can be selected manually and downloaded.
Secondly, the wireless transmission rate may NOT be stable and may vary depending on the time of day, the electromagnetic environment, and the load on the Wi-Fi network. True, in addition to digital technologies, there are also types of wireless surveillance cameras, but IP systems are best suited for THESE purposes. But we are somewhat distracted.
The second method is applicable if a hidden camera is installed temporarily. Otherwise, the need to read information from the recorder will cause a lot of trouble.
RECORD FEATURES FUNCTIONS
When using any method of creating an archive in order to save media memory, such recording modes can be used as:
- Scheduled;
- By motion.
Schedule recording.
For this, the recorder has settings for the day of the week and time during which events will be recorded.
Motion detection.
A very popular and effective mode, the essence of which is to set the field of view, when movement is detected in it, the desired fragment will be saved on the appropriate media. A motion detector can be implemented on the side of an external recording device: a recorder or a PC, or directly by means of a surveillance camera. IP cameras have such capabilities.
Also pay attention to the overwrite function. When activated after the media is full of information, the oldest recordings will be automatically deleted, providing space for new files.
Concluding the topic, it is worth saying a few words about the organization of recording for covert surveillance systems. The temptation to use a camera with a memory card for this is quite large, however, the peculiarities of its installation can make reading (viewing) the necessary information rather difficult due to the limited access to the device in question, which was already mentioned above.
2014-2020 G. All rights reserved.
Site materials are for informational purposes only and cannot be used as guidelines and regulatory documents.
Technical features
Most often, archived data is stored on a hard disk or a memory card of the recorder. The hard disk has a large memory capacity and a high level of reliability. For professional systems, the hard disk is considered the only possible storage device, since we are talking about storing a huge amount of information. Models from leading manufacturers serve for several years (taking into account cyclic rewriting). But over time, any hard drive is demagnetized, and unreadable sectors appear on it.
Important! In surveillance systems, it is not recommended to use hard drives intended for stationary office computers. They are NOT designed for continuous high load, in particular for rewriting and playing data for several users at the same time. Check with your surveillance equIPment manufacturer or dealer for recommended hard drive models.
The memory cards that come with some IP cameras and car recorders are not suitable for storing large amounts of data. Standard models of 32 or 64 GB are enough for archiving from one observation point for 1-3 days, and then provided that the recording is carried out using a motion sensor. As a rule, this is sufficient for amateur needs.
What if you want to keep certain surveillance footage permanently? In such a situation, you can copy the archive files to a flash drive from a verified GoPro manufacturer. It is recommended to store it away from sources of electromagnetic radiation and places with high humidity.
HOW MANY MONITORING CAMERAS are stored
We have more or less sorted out organizational issues related to the storage time of recordings from cameras. Now you can move on to the technical side of the issue. As stated, the primary storage device for simple surveillance systems is the hard disk drive (HDD). Its capacity determines the storage time of the archive.
The fact is that no one will calculate the exact value for you. Indeed, in addition to factors such as:
- Surveillance camera resolution;
- Compression speed;
- The type of codec used, etc.,
There are moments that are difficult to determine, for example, the intensity of movement of people in the field of view. In addition, it can be different for different cameras in the surveillance system. In this case, it is worth determining the required storage time for each camera, calculating the required amount of memory for the recording time of a specific zone, and adding the results obtained.
However, as personal experience shows, in most cases, for surveillance systems that I classified as amateur at the beginning of the article, 1 TB of memory is quite enough. Nevertheless, it is still worthwhile to roughly estimate the HDD capacity.
It is worth noting that the calculation of the archive depth has no fundamental differences for analog systems and IP surveillance. Of course, there are subtleties here, but “household” level they are NOT fundamental.
Systems Safe city
In some cities, there is a common surveillance network that connects cameras in courtyards and entrances to apartment buildings, crowded places and at intersections. The unified information system ensures the safety of people, helps to identify the identity of offenders and provides evidence in the event of administrative violations or criminal offenses. Records from places of mass gathering of citizens are stored for 5 days, from educational organizations. for 30 days. In other cities, other dates may be set.
Hard disk FOR SURVEILLANCE
As already mentioned, the overwhelming majority of surveillance systems use a hard disk to record information. Besides a certain amount of memory, the HDD must have high reliability. At the same time, it is not at all necessary to buy a specialized hard drive for surveillance, especially since this is more a marketing ploy than a reality.
The characteristics of the hard disk always indicate such parameters as:
- Rotational speed;
- Built-in memory;
- Interface type.
The first two do NOT have a particular impact on the choice of HDD for surveillance systems. Unless, if it speaks about the spindle rotation speed, then a large number of revolutions can indirectly affect the durability of the disk in the recorder.
The fact is that the higher this indicator, the higher the operating temperature of the device. For a system with a large number of cameras and high recording rates, this can be critical. A speed of 5400 or 7200 rps is quite enough for our purposes.
As for the interface, most of the registrars use SATA, moreover, they are the most common. But nevertheless, when buying a disc at this point, pay attention.
I would like to remind you once again that formatting a hard disk erases the entire archive, although the registrar usually warns about this. But he does not say that there are two modes of working with HDD, but you need to know this:
- When the hard disk is full, recording stops; or, if the disk is full, overwriting is performed. new ones are written in place of the oldest files.
Another thing to remember:
- Any registrar has limitations on the volume of the supported disk;
- There are recorders with the ability to connect two HDDs.
All of the above will allow you to choose the right set of equIPment and ensure the required storage period of records. But keep in mind, when using the options discussed, a hard drive failure deprives you of all previously recorded information.
If high reliability of information storage is required, then you should use IP systems with information storage on the monitoring server, and use RAID arrays to create and store record archives. Expensive, of course, but a professional system is NOT cheap.
2014-2019 G. All rights reserved.
Site materials are for informational purposes only and cannot be used as guidelines and regulatory documents.
Records from surveillance cameras must be kept for a certain time, because the archive is often used to clarify controversial situations. In the article we will figure out what factors the storage duration depends on.
How many records are kept in private surveillance systems
The maximum recording time of the archive is determined on an individual basis and depends on several factors, including:
- Legal requirements;
- Industry interests;
- The time of obtaining permission to view and take action;
- Internal control regulations;
- The presence of recurring events.
For example, in some organizations there are services that assess the quality of the work of employees. Since thes are regularly and carefully viewed, there is a need for their long-term storage. If the auditor notices a dubious incident, he immediately report the incident to the manager.
Retailers often analyze seasonal shoppers’ behavior and cover large time intervals. In THESE cases, special recording processing programs and voluminous digital media are required. The situation becomes more complicated when surveillance affects the personal rights of citizens. Obtaining permission for access Takes a lot of time, and this should be taken into account when calculating the retention period.
Important! CCTV recordings in commercial systems are often stored for no more than two weeks.
How many surveillance cameras write
The surveillance system archive is a certain amount of information (recordings from surveillance cameras) stored on some medium. Most often, a hard disk (HDD) of the required capacity (volume) acts as such. Let’s take a look at the main questions about archiving records from a practical point of view.
Conventionally, surveillance systems can be divided into the following groups:
- Amateur;
- Semi-professional;
- Professional.
Accordingly, the requirements for the method of creating the archive and the storage time of records will be different.
The first group includes surveillance installed in the country, in a private house or apartment. As a rule, such systems have a very small number of cameras, the recording is carried out on the hard disk of the recorder.
As a rule, there are two factors that determine these terms:
- The time during which it may be necessary to obtain information for certain purposes;
- The budget allocated for equIPping the facility with a surveillance system.
Despite the obviousness of the first point, there are some nuances here. The fact is that modern recording systems allow you to create backup copies of the necessary fragments. Reservation is often done on a flash drive (USB drive), although other options are possible. it depends on the model and capabilities of the same recorder.
After that, a copy of the necessary files is created and stored for any necessary time, for example, for the duration of legal proceedings.
How many records are stored in UControl surveillance systems
The storage time in UControl systems depends on the number of cameras connected to the recorder, recording quality settings (resolution, recording rate and bit rate), recording type (continuous, motion detection or scheduled) and hard disk capacity. Simple rules apply here: the more cameras, the better the image quality settings and the more often the recording is made, the heavier the archive will be. For example, to record the actions of employees in the office, you can set the best resolution settings, the speed will be set to 12 frames per second (there will be a slight slowdown effect of objects moving in the frame), and the recording should be carried out by motion. To control employees, these parameters are optimal, and increasing the recording speed to the maximum possible 25 frames per second, the movement of objects will become very smooth, but this will add the volume of recorded data.
Calculations for selecting a hard drive:
| Qty cameras in system |
Used hard disk space | ||||||
| 500 GB | 1 TB | 2 TB | 3 TB | 4 TB | 6 TB | ||
| Archive size in days for the selected disk | |||||||
| analog 960H 960×576. 25 frames. / FROM 2048 kbps |
2 | 12 | 24 | 48 | 72 | 96 | 144 |
| 4 | 6 | 12 | 24 | 36 | 48 | 72 | |
| 6 | 4 | 8 | sixteen | 24 | 32 | 48 | |
| 8 | 3 | 6 | 12 | eighteen | 24 | 36 | |
| AHD or IP 1 MP 1280×720. 25 frames. / FROM 4096 kbps |
2 | 6 | 12 | 24 | 36 | 48 | 72 |
| 4 | 3 | 6 | 12 | eighteen | 24 | 36 | |
| 6 | 2 | 4 | 8 | 12 | sixteen | 24 | |
| 8 | 1.5 | 3 | 6 | nine | 12 | eighteen | |
| AHD or IP 2 MP 1920х1080. 25 frames. / FROM 8192 kbps |
2 | 3 | 6 | 12 | eighteen | 24 | 36 |
| 4 | 1.5 | 3 | 6 | nine | 12 | eighteen | |
| 6 | 1 | 2 | 4 | 6 | 8 | 12 | |
| 8 | 0.8 | 1.5 | 3 | 4.5 | 6 | nine | |
| AHD or IP 3 MP 2048×1536. 25 frames. / FROM 12288 kbps |
2 | 2 | 4 | 8 | 12 | sixteen | 24 |
| 4 | 1 | 2 | 4 | 6 | 8 | 12 | |
| 6 | 0.7 | 1.3 | 2.7 | 4 | 5.3 | 8 | |
| 8 | 0.5 | 1 | 2 | 3 | 4 | 6 | |
As a rule, for a small number of cameras, a hard disk with a volume of 0.5-1 TV is sufficient. If you use a lot of cameras or shoot at Full HD resolution or higher, it is better to purchase a drive with a volume of 2-3 TVs or more. For example, for a budget 4-channel Economy 7S kit with continuous recording and the best image quality settings, an installed 500 GB hard drive will be enough for 6 days of continuous recording. At the same time, for a 4-channel HD-SDI kit Profi HD under the same conditions, a hard disk of 2000 GB is enough for 4 days of continuous recording.
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1. To calculate, we need to know the size of the hard disk or memory card to which the recording is made. Available hard drives: 1TB, 2TB, 3TB, 4TB, 6TB, 8TB, 10TB, 12TB.
2. The size of the recording file from 1 camera / day.
The archive size will depend on:
– surveillance camera resolution (number of megapixels).
– number of frames / second. Usually it is 24 fps. For fixing the protected area, warehouses or in the office, 16 fps or even less will be enough. For dynamic scenes. for example, reading the license plate from passing cars, there are cameras capable of shooting at a speed of 60 fps. By reducing the number of frames, we are increasing the size of the archive.
– here is the level of motion in the frame. The coding aLGorithm compares the last few frames, if there are changes, they are recorded. If the picture is static, and there is little movement, then the size of this will be much smaller than from an object filming a busy intersection.
– here is the compression codec: h264. the most common and used codec; Since 2017, more and more equIPment has begun to appear capable of Compressing in h265. which allows better Compressing files by about 10-20%, thereby increasing the recording storage time for surveillance systems. For the h265 codec to receive the same distribution, at least a couple of years must pass. If you nevertheless decide to purchase such equIPment, you must take into account that, in addition to cameras, the recorder has support for the H.265 standard. And in the settings, check which codec is the default. Read more about the comparison of codecs read our material.
The table below shows the average values of the archive size from one surveillance camera per day, with different resolution, using the h.264 codec, with an average level of motion in the frame.
| Mp | Volume, GB / day |
| 1 | 16.5 |
| 1.3 | 21.45 |
| 2 | 33 |
| 4 | 66 |
| five | 82.5 |
| 8 | 132 |
| 12 | 198 |
3. The number of cameras in the system. As their number increases, the archive size increases in proportion to the number of cameras. Consequently, the storage time of the record is reduced by a factor of n. That is, with 4 cameras, the recording archive was stored, say, 30 days, if you added 4 more cameras to the same recorder, the recording archive will be halved (up to 15 days).
Let’s count.
Hard disk capacity / (File size from one camera per day Number of cameras) = How many days will be kept recording from surveillance cameras.
Example:
We have 1 HDD. 1 TB hard disk (Terabyte). this is
1000 GB. we convert everything into Gigabytes, so that the calculation is in the same number system.
Camera 2 MP (FULL-HD 1920 × 1080). recording archive per day Takes 33 GB (see the table above).
Number of surveillance cameras in the system 4 pcs.
1000 / (334) = 7.6 days of continuous recording, our archive will be about seven and a half days (maybe a little more if there are not many movements in the frame)
For the convenience of calculations, we suggest using our calculator: https://rucam-video.ru/raschet-emkosti-zhestkogo-diska.html
If the recording will go NOT around the clock, but by the motion detector, then the number of days received can be multIPlied by two (approximately). 7.62 =
Author: Dmitry Samokhvalov, technical editor at Rucam-Video.
How many recordings from surveillance cameras are stored
Records from surveillance cameras must be kept for a certain time, because the archive is often used to clarify controversial situations. In the article we will figure out what factors the storage duration depends on.
How many records are kept in private surveillance systems
The maximum recording time of the archive is determined on an individual basis and depends on several factors, including:
- Legal requirements;
- Industry interests;
- The time of obtaining permission to view and take action;
- Internal control regulations;
- The presence of recurring events.
For example, in some organizations there are services that assess the quality of the work of employees. Since thes are regularly and carefully viewed, there is a need for their long-term storage. If the auditor notices a dubious incident, he immediately report the incident to the manager.
Retailers often analyze seasonal shoppers’ behavior and cover large time intervals. In THESE cases, special recording processing programs and voluminous digital media are required. The situation becomes more complicated when surveillance affects the personal rights of citizens. Obtaining permission for access Takes a lot of time, and this should be taken into account when calculating the retention period.
Important! CCTV recordings in commercial systems are often stored for no more than two weeks.
Systems Safe city
In some cities, there is a common surveillance network that connects cameras in courtyards and entrances to apartment buildings, crowded places and at intersections. The unified information system ensures the safety of people, helps to identify the identity of offenders and provides evidence in the event of administrative violations or criminal offenses. Records from places of mass gathering of citizens are stored for 5 days, from educational organizations. for 30 days. In other cities, other dates may be set.
Technical features
Most often, archived data is stored on a hard disk or a memory card of the recorder. The hard disk has a large memory capacity and a high level of reliability. For professional systems, the hard disk is considered the only possible storage device, since we are talking about storing a huge amount of information. Models from leading manufacturers serve for several years (taking into account cyclic rewriting). But over time, any hard drive is demagnetized, and unreadable sectors appear on it.
Important! In surveillance systems, it is not recommended to use hard drives intended for stationary office computers. They are NOT designed for continuous high load, in particular for rewriting and playing data for several users at the same time. Check with your surveillance equIPment manufacturer or dealer for recommended hard drive models.
The memory cards that come with some IP cameras and car recorders are not suitable for storing large amounts of data. Standard models of 32 or 64 GB are enough for archiving from one observation point for 1-3 days, and then provided that the recording is carried out using a motion sensor. As a rule, this is sufficient for amateur needs.
What if you want to keep certain surveillance footage permanently? In such a situation, you can copy the archive files to a flash drive from a verified GoPro manufacturer. It is recommended to store it away from sources of electromagnetic radiation and places with high humidity.
How many records are stored in UControl surveillance systems
The storage time in UControl systems depends on the number of cameras connected to the recorder, recording quality settings (resolution, recording rate and bit rate), recording type (continuous, motion detection or scheduled) and hard disk capacity. Simple rules apply here: the more cameras, the better the image quality settings and the more often the recording is made, the heavier the archive will be. For example, to record the actions of employees in the office, you can set the best resolution settings, the speed will be set to 12 frames per second (there will be a slight slowdown effect of objects moving in the frame), and the recording should be carried out by motion. To control employees, these parameters are optimal, and increasing the recording speed to the maximum possible 25 frames per second, the movement of objects will become very smooth, but this will add the volume of recorded data.
Calculations for selecting a hard drive:
| Qty cameras in system |
Used hard disk space | ||||||
| 500 GB | 1 TB | 2 TB | 3 TB | 4 TB | 6 TB | ||
| Archive size in days for the selected disk | |||||||
| analog 960H 960×576. 25 frame. / FROM 2048 kbps |
2 | 12 | 24 | 48 | 72 | 96 | 144 |
| 4 | 6 | 12 | 24 | 36 | 48 | 72 | |
| 6 | 4 | 8 | sixteen | 24 | 32 | 48 | |
| 8 | 3 | 6 | 12 | eighteen | 24 | 36 | |
| AHD or IP 1 MP 1280×720. 25 frame. / FROM 4096 kbps |
2 | 6 | 12 | 24 | 36 | 48 | 72 |
| 4 | 3 | 6 | 12 | eighteen | 24 | 36 | |
| 6 | 2 | 4 | 8 | 12 | sixteen | 24 | |
| 8 | 1.5 | 3 | 6 | nine | 12 | eighteen | |
| AHD or IP 2 MP 1920×1080. 25 frame. / FROM 8192 kbps |
2 | 3 | 6 | 12 | eighteen | 24 | 36 |
| 4 | 1.5 | 3 | 6 | nine | 12 | eighteen | |
| 6 | 1 | 2 | 4 | 6 | 8 | 12 | |
| 8 | 0.8 | 1.5 | 3 | 4.5 | 6 | nine | |
| AHD or IP 3 MP 2048×1536. 25 frame. / FROM 12288 kbps |
2 | 2 | 4 | 8 | 12 | sixteen | 24 |
| 4 | 1 | 2 | 4 | 6 | 8 | 12 | |
| 6 | 0.7 | 1.3 | 2.7 | 4 | 5.3 | 8 | |
| 8 | 0.5 | 1 | 2 | 3 | 4 | 6 | |
As a rule, for a small number of cameras, a hard disk with a volume of 0.5-1 TV is sufficient. If you use a lot of cameras or shoot at Full HD resolution or higher, it is better to purchase a drive with a volume of 2-3 TVs or more. For example, for a budget 4-channel Economy 7S kit with continuous recording and the best image quality settings, an installed 500 GB hard drive will be enough for 6 days of continuous recording. At the same time, for a 4-channel HD-SDI kit Profi HD under the same conditions, a hard disk of 2000 GB is enough for 4 days of continuous recording.
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