Every year in Ukraine there are more than six thousand burglaries and quite a few cases of assault and violence in the entrances of apartment buildings, and there are also frequent cases of fraudulent actions against elderly citizens. In addition to crimes against residents of the house, the police record a large number of facts of theft of communal property, for example, theft of elevator shafts, as well as theft of cable and Internet equipment. Therefore, the conclusion suggests itself that not only residents of the house should be interested in the safety of the entrance, but also employees of housing and communal services, social services, as well as the Internet and television providers.
Of course, the presence of a concierge at the entrance, good locks on the doors and bars on the windows may well protect you from burglary and theft, but the most effective alternative to all this is video surveillance. Lattices and locks can be bypassed and broken, and the concierge, like any person, is quite capable of overlooking or absenting from something, and in addition, according to statistics, 10% of thefts are committed with free access to the apartment, that is, by relatives or guests of the tenants that concierges can’t prevent.
While the video camera is not only capable of displaying a clear picture of everything that happens in the stairwell, elevator and stairs in real time even in complete darkness, but it can even reproduce the events of a particular day, it is constantly recording. The presence of a video camera can not only help in solving an already committed crime, catch criminals and help return the stolen, but it can even prevent theft or crime! Indeed, according to the legislation of Ukraine, residents of the house are required to place the inscription “Video surveillance is in progress” on both sides of the entrance doors, and this may well serve as a psychological factor and scare off potential criminals from your home. In cases where the residents of your house do not want to install general video surveillance in the entrance or elevator, you have the right to install an individual surveillance camera near the door to your own apartment, this does not require any special permits, except for the consent of neighbors.
Although the placement of hidden cameras is prohibited by law, the modern choice of video equipment is so diverse and large that you can choose and install such an inconspicuous camera that, with the necessary disguise, it will be difficult for an uninitiated person to find it. Also on the market of security systems, a large selection of anti-vandal outdoor cameras is provided, which, if desired, will be very problematic to tear off or disrupt their correct operation. Modern cameras have high light sensitivity and infrared illumination, so you don’t have to worry about your safety in low or no light conditions.
It is important for any person to realize that it is much easier and cheaper to prevent trouble at home than to get rid of the unpleasant consequences of a crime.
What to look for when choosing an ip camera?
PoE availability. This technology allows you to supply power to the ip camera through an ethernet cable (twisted pair). Thanks to this, there is no need to pull an additional wire.
We recommend purchasing IP cameras with PoE support. In this case, there is no need to place it near a 220V electrical outlet, this allows it to be installed at a remote distance of several tens of meters. In addition, if the power outlet fails, only one camera will be inoperative.
The presence of IR illumination. Allows you to enter a recording in the dark.
IP cameras can be produced with or without a built-in microphone (speaker). With the presence of a microphone, it becomes possible to simultaneously transmit sound along with a video signal in one stream. In addition, some devices have an internal jack for connecting an external expansion microphone when the microphone itself needs to be placed a few meters from the camera. The Shorokh-7 microphones are quite popular (where 7 is the radius of the audio signal capture). The microphone can be configured using the camera software, setting the necessary parameters for noise reduction, signal amplification, as well as choosing an audio decoder.
External connectors of the ip-camera for an SD card or USB device allow recording in offline mode, that is, when there is no ethernet network signal, which is a very important attribute, especially in organizations that pay special attention to security.
Reolink Go WIRE FREE 4G Mobile Security Camera | NO WIFI NO ELECTRICITY USE ANYWHERE!
First of all, the main difference between the IP camera, which makes it such, is the transmission of the signal in digital form. Thus, it is a network device that has an IP address. Otherwise, it will only be able to work offline. Thus, this address will be a unique identifier that allows you to access the camera from almost anywhere in the world. The address must be set static so that it does not change during subsequent reboots and you do not lose access to the device. Work is carried out using TCP or UDP protocol.
As a rule, the camera comes with software that makes it easy to configure the camera, including its network interface.
IP camera device: how it all works?
Any such camera consists of several parts:
- CCD or CMOS matrix
- lens with different viewing angles (can be either interchangeable or fixed)
- optical filter
- Ethernet interface
- main processor
- built-in microphone (if available)
- image compression unit
- video processor
- Motion Detector
- infrared illumination
- SD-card slot or USB-slot
- various mechanical filters
The CCD matrix is the receiving part of the camera, it is she who is responsible for the resolution. In essence, it is an analog part, the signal is received in an analog form. Typically, the minimum resolutions are 640 by 480 pixels. It is advisable to purchase them with FullHD support, that is, with a resolution of 1920 by 1080. The quality of the receiving matrix is precisely responsible for the resolution. At the moment, the development of specialized cameras with gigapixel resolution is taking place. Often in their parameters, the resolution is indicated in megapixels (Mp). A resolution of 1280 by 960 will correspond to 1MP, a resolution of 1920 by 1080. 2MP, a resolution of 2048 by 1536. 3MP.
The task of the matrix is to convert the light entering it into an electrical signal. This actually happens in 3 stages: reading the signal, amplifying it and directly encoding.
The lens is responsible for the viewing angle, that is, for its ability to capture external light sources, in fact, it is a lens system. By changing the lens, you can change the angle of view of the camera. As a rule, it varies in the range from 45 to 120 degrees. In this case, dome cameras, the so-called fisheye, can have a full 360-degree field of view.
The processor produces the output of the digitized encoded signal, and also controls the operation of the web server and other software. Although there are devices that transmit a video signal without compression, most compress it using a streaming (MPEG-4, H.264) or frame-by-frame (MJPG) method.
Random access memory temporarily stores data used in the process of performing various functions embedded in the control program.
Various filters installed in the device are designed for correct color reproduction and work by cutting off the infrared component of light waves. However, in low light conditions, they use exactly the infrared range, thus allowing you to switch between the “day” and “night” modes.
Having systematized, let’s highlight the main purposes of ip-cameras:
- remote monitoring of technological processes of production or trade;
- visualization, detection and documentation of emergency situations;
- building advanced video surveillance systems;
- monitoring of protected objects;
- security (installation in schools, airports);
- banking sector (use in ATMs and service terminals);
- posts of safety and observance of traffic rules.
How to choose an IP camera?
IP cameras are becoming an integral part of our lives. Now it is difficult to imagine any security system without them. From the commercial sphere, they also began to expand into our daily life. Now they are installed not only in factories, shopping malls and parks, but also in dachas, in private houses and apartments. If you want to watch at any time what your pet is doing in your absence. please install a recording device at home, set up access from your mobile device to connect.
The undoubted advantage of any IP camera is the simplicity of its connection and configuration. One RJ-45 patch cord will be enough. A standard camera has two connectors for connection. an Ethernet connector (the same type of RJ-45 connector) and a 12V power connector.
To decide on the choice of an ip-camera, you need to understand where it will be installed indoors or outdoors, and also decide on the sound. Need a sound or not?
Among IP cameras, the most common models are from the following manufacturers:
They all have the same principle of operation, differ only in their characteristics and, of course, in price.
Advantages and types of IP cameras in the modern world
Modern ip cameras have a number of advantages, first of all, these are:
- flexibility. The device can be placed freely at your discretion in any accessible place where you have access to a local network or the Internet using a Wi-fi or GPS signal;
- ease of installation. After setting the network settings: address, netmask, network gateway, you can immediately start working;
- access. Any computer connected to the Internet: computer, tablet, smartphone can be accessed at any time from anywhere;
- advanced functionality. There is no need for additional processing of the received video. after it is written to disk, it can be viewed, processed, and so on;
- extended functionality. There is no need for additional processing of the received video. after it is written to disk, it can be viewed, processed, and so on;
- high signal quality. As mentioned above, 3 megapixels is already a fairly common resolution for cameras, and they are actually not limited in this;
- high signal stability.
Outdoor IP cameras differ only in that they have a durable anti-vandal protected case and an extended operating temperature range, usually from 50 to 45 degrees Celsius. The cost of such cameras is, of course, more expensive than domestic ones.
Dome IP cameras are made in a spherical shape. The sphere itself is made of tinted transparent plastic, which does not allow an outside observer to understand where the camera lens is directed.
Boxed IP cameras usually have a rectangular or cylindrical shape, are installed in commercial and industrial premises, cultural facilities.
Mini cameras can be used at home, they can be connected to the network via wi-fi and have miniature power supplies.
In conclusion, we will say that when choosing an ip-camera for video surveillance, you must, first of all, attribute its characteristics, declared value and operating conditions. For example, there is no need to purchase an outdoor IP camera for home installation. Or there is no need to buy it with a microphone if you do not have a need for sound recording. Keep in mind that this area is developing at a rapid pace, and what was new yesterday may already be outdated in 3 years.
This camcorder. an inexpensive and convenient option for the middle market segment. The camera has an image resolution of 1280×768 pixels, 5 megapixels, with a viewing angle of 68 degrees. The camera has an infrared illumination, which is distributed in a radius of 6 meters, as well as the function of sending data by email. In addition, it is possible to expand the functionality by connecting additional modules and sensors.
In general, most GSM cameras are designed for self-installation and do not require any special installation funds. An exception can be systems without an autonomous power source. here you will have to lay special cables. As for the operating time. in stand-alone mode, the average video camera is designed for 10 hours of operation.
To start the IP camera system, you need to resort to additional software installation for PCs or smartphones based on Android or IOS platform. Details are always described in the technical documentation of the devices.
It should also be remembered that when connecting multiple cameras, the help of professionals can come in handy; if you need covert surveillance, you must first familiarize yourself with the relevant legal regulations.
Features of the
In principle, a video surveillance camera with a SIM card differs from analog and digital methods of data transmission. In the first, information is transmitted over a coaxial cable, in the second. over the so-called twisted pair. In GSM systems, the principle of communication is similar to that of mobile communication, therefore an integral attribute of such devices is a SIM card with a unique number. In this case, the configuration diagram of the unit can also be of different types:
- video camera with built-in transmission module;
- an ordinary video camera connected to a self-contained unit;
- IP video camera with GSP function.
The main features of cameras with a SIM card include:
- a certain number of transmitted frames per unit of time (information discreteness);
- data transmission is carried out either via the Internet network (3g, 4g), or via SMS / MMS distribution.
A video surveillance system can be represented both by a set of cameras independent from each other, located in the required locations, or by a structure of interconnected devices united by a basic module. In terms of its constituent parts, an average GSM wireless system consists of the following physical blocks:
- battery with charge control function and voltage converter;
- a module that provides communication with a mobile phone, implying a slot for a SIM card;
- a software package that describes the logic of the system’s behavior;
- a set of elements that provide the function of storing data. both inside the device by default and on external media.
Do not forget that in more expensive market segments you can find camcorders with advanced functionality. However, the essence of such systems remains the same regardless of the price. These models include cameras with a motion sensor, devices with infrared illumination for working at night, as well as the function of “freezing” the image.
The simplest option, which does not require additional actions from the user, are surveillance cameras with a built-in GSM-unit. In this case, the SIM card is installed and adapted in the device by default, while the data does not come in the form of a stream (broadcast), but in the form of separate fragments, provided that the motion sensor is triggered, according to the schedule set by the owner or other identification marks.
Honor says that such a system contains only one camera that monitors a small area, such as an enclosed space or a courtyard.
You also need to choose your carrier carefully to avoid interference or connection failures. The presence of an autonomous connection unit makes it possible to connect several cameras at once without a built-in SIM card. Unlike systems with built-in GSM modules, there is a function of connecting several phone numbers at once, to which notifications will be sent from different cameras, as well as from different motion sensors.
Before equipping the territory with such a system, it is necessary to understand the principle of the interaction of the reference points (cable or wireless connection), analyze the power supply methods for each node (from the outlet or stand-alone mode), and also select the models of cameras that broadcast the video stream or transfer photos. Remote communication units have functions such as converting video data or images (for example, displaying multiple angles on the screen), storing information in memory, and supporting communication with a cellular operator.
IP cameras are not only the most expensive, but also the optimal and multifunctional way of video surveillance.
The video is broadcast online, in parallel with the recording of data on a flash drive. In general, the device contains the following functional units:
- Motion Sensor;
- IR illumination;
- built-in memory;
The principle of operation of IP cameras is flexible due to the fact that the basic processes can be programmed manually. For example, if the user wants to save memory, it is possible to enable image recording only if the sensor is triggered. When choosing a unit with such functionality and cost, it is worth paying attention to many parameters, such as noise immunity, sensor sensitivity, resolution and viewing angle, frequency range, and data transfer rate. Data addressing is performed using special computer protocols, and therefore the device can be considered a full-fledged WEB-camera with extended functionality. In particular, it is possible to connect the system to wireless communication networks or to include cameras in existing networks.
How to choose a CCTV camera with a SIM card?
Modern technologies of cellular communication have made it possible to take a huge step in the development of the field of video surveillance and burglar alarms. This is due to the fact that modern CCTV cameras have acquired the function of transmitting a signal to the owner’s mobile phone. Now you can send SMS notifications, store data in the device memory, and also control the main functions of the surveillance unit.
This equipment is one of the optimal models of GSM cameras. It has a high night view range (60 meters), a resolution of 1280×960 pixels, and an acceptable weight (700 grams). The camera shell is designed for harsh weather conditions, which makes it easy to position it outdoors (temperature ranges from 33 to 55 degrees Celsius). There is also a cloud storage of information and the function of its addressing on request.
If you need to implement remote video surveillance in a country house, the best option is a GSM camera for a summer residence. The main obstacle to the operation of such a system may be poor communication quality, depending on the chosen operator. The solution is special 4G amplifiers. In this regard, the user incurs additional costs for the Internet connection.
The main advantages of cameras for summer cottages is the possibility of their location in optimal places for these needs, as well as the presence of a remote monitoring function, which is feasible for analogs only for a fee or not at all.
In addition, the camera can also be suitable for the garage. the main condition is the availability of an uninterrupted signal. The device can be powered both autonomously and stationary, that is, from the network.
The outdoor camera, as well as the unit that is applicable in the “smart home” system, have a number of differences. First of all, they are associated with the climatic conditions in which the device must be operated. In the case of outdoor cameras, they are more severe (for example, an outdoor camera is installed in a special heat-resistant case).
The model is compact and self-contained, and also has the function of creating a storage for data and recording audio. The resolution and viewing angle here are lower than those of the previous analogue (640×480 and 58 degrees), but the backlight range at night wins (8 meters). The camera is designed for 8 hours of battery life.
The video below will show you how to connect an IP camera to an iPhone or Android smartphone.
How not to lose the most interesting part of the captured video due to the wrong choice of memory card?
Good afternoon, dear readers. In this article I am ready to answer the question of many troubling questions, which memory card to choose for a camcorder. When buying a memory card, special attention should be paid to the choice of a storage medium, because memory tends to run out at the most inopportune moment, hardly anyone wants to lose the most interesting part of the captured video. What accessory to choose, what to focus on. these important issues will be discussed in this article.
The main criteria for choosing an information carrier are:
- Support for suitable video type;
- Recording speed;
- Reading speed.
While it is quite easy to figure out the supported type of device and volume, the questions regarding speed remain a mystery for some users of cameras. The speed of writing a flash drive is responsible for the scope of this accessory. If the flash drive has a low speed, then you will hardly be able to shoot a Full HD video or the device will simply “freeze”. Agree, an unpleasant situation. Therefore, you need to be careful about every aspect.
Varieties and speed of memory cards
Often you have to deal with the choice of a flash drive for a video camera right away when buying a device. With the question of which media to choose for the camera you like, you can always contact a sales consultant who will determine the maximum possible speed of recording a flash drive and the type of required component. But what to do if something happened to the memory card, or you just needed to increase the memory. Then you will have to figure it out on your own, or rather, with my help.
Common types of cards:
- SDHC, with a capacity not exceeding 32 GB;
- SDXC, 64 GB or more.
The most popular manufacturers of flash media are Silicon Power, Transend, SanDisc, Kingston.
What you should pay attention to when buying a USB flash drive from manufacturers:
- In such media, the speed indicator is indicated in the classes, it speaks about the minimum recording speed. Let me give you an example, a class 2 card has a minimum speed of 2 Mb / s. To shoot a Full HD video, a storage device with at least sixth grade, and preferably tenth grade, is used;
- Often on SD cards you can see the designation UHS I, II, III. This suggests that the minimum write speed of a UHS flash drive I = 10 MB, etc.;
- There is also another designation indicating the speed of reading flash media, for example, 133x. In this case, 1x = 150 Kb, that is, for a card with a speed of 10 Mb / s. the notation 66x is used;
- Most often, speed data is indicated on the package, so you should carefully study it before buying;
- When purchasing a storage device in SDHC format, you need to be prepared for the fact that the maximum length of a video will not be long, because this type works on the basic FAT32 file system. In order to shoot a long video, it is better to choose an SDXC flash drive, which uses the exFAT file system;
- Owners of professional devices should give preference to Compact Flash or XQD cards.
What are the risks of buying a slow flash drive?
Correct packaging is very important to keep your camcorder running smoothly and productively. Therefore, the use of a media that does not match the speed of the camera is fraught with numerous consequences. Buying a slow card may damage the files captured by the camcorder or reduce the recording extension in order to match the speed ratio. When shooting short videos, there may be a problem of long waiting times, since the previous file is still saved to the USB flash drive. Another problem that you can face is camera freezing, long and persistent shooting can result in the video being cut off at any time due to insufficient speed.
So, we figured out the types of carriers and their speed indicators. Let’s start discussing another important aspect when choosing a video camera card.
Capacity of memory cards
If you ask me how much memory is needed for a video camera, then I will answer you: “The more, the better.” That is why models with 2 memory card slots are considered a good option for cameras. Owners of such a practical device will definitely not have to face the problem of insufficient capacity. Therefore, we will now discuss the storage capacity for units with 1 slot.
There are several factors to consider when buying:
- The purpose of filming. If you are professionally shooting video, for example, you work as an operator at celebrations, then the capacity of the flash drive should be maximum, as far as the camera provides;
- Video weight, if, for example, you have to shoot 4K video, then 1 second of a video of this quality will take about 10 MB. Having made some simple calculations, you can understand that a card with a volume of 64 GB will fit approximately 2 hours of shooting.
There are two important rules to follow when buying a card. First, choose a medium that matches the specifications of your camcorder. Second. give preference to well-known, reputable manufacturers, they often provide a guarantee for their products, this gives confidence that the component will last a long time, and the recorded data will not be lost.
That’s all for me, dear readers, see you soon. By adhering to these rules, you will always know the answer to the question of which memory card to choose for the camera. Subscribe and share information about me with your friends, then I will help you more than once in solving many issues.
How to choose the size of the memory card?
The image file size depends on the number of fine details stored in the picture (image resolution), as well as the output format ( RAW. Jpg ). On average, a RAW image takes about 30 MB, and if you take into account those who like shooting video in high resolution, it will be very unpleasant for you to find out that the memory card is full on a trip.
Therefore, if you plan to shoot both photos, videos, as well as pictures of the format RAW. then it is worth stopping at the volumes of the memory card about 16-32 gigabytes.
Below we give a table that allows you to roughly estimate how many minutes of video, as well as a photo that can fit on memory cards of different sizes. The table takes into account videos in the format MPEG.four/ H.264 Full HD and a photo in JPG format weighing 3.5 MB per image. Please note that the table does not include shooting in the format RAW. consider this when choosing the size of the memory card.
In the presence of the seller, open the card and insert it into your camera, format it. take a few test shots, look at the resolution of the pictures. Then remove them one at a time and format the card again. If everything went well, then you can safely take this card. If something does not work out, it is better to replace it with another.
How to choose write and read speed?
The most important characteristic of a memory card for a camera is the speed of writing and reading information. The example of the Sandisk map below shows exactly where this is indicated. To make you understand the importance of this characteristic, I will give examples: it will not be possible to record Full HD video on a slow memory card, and even when you shoot a series of frames, your camera may have a high latency when recording a series of pictures on the memory card. (This is very frustrating).
On SD cards, speed markings are usually indicated either in megabytes per second or a class number. Grade 6. 6 MB / s. When the marking reaches grade 10, the manufacturer usually writes the real speed in this format. 45 MB / s On CF cards, the markings are indicated in full. in MB / s.
What class of speed to choose a memory card?
The choice of speed class depends on your individual needs. For shooting Full HD video. choose a memory card of at least 6 Mb / s, but better of course 10 Mb / s. or higher. If you plan to shoot in short, continuous bursts and want to avoid lag, then it’s best to choose. 30 Mb / s. and higher.
When shooting moving subjects, where you need to continuously shoot a series of shots, the speed of 45 Mb / s is the best solution. For professionals who work with very long bursts of pictures (reportage shooting, etc.), where it is simply necessary to capture the desired frame, the highest speed will be needed. 100 Mb / s. A professional camera using this write speed can make a continuous burst until the free space on the media runs out.
– do not insert / remove the card while the camera is on.
. do not expose cards to strong magnetic fields.
. make sure that the memory card does not fall
. not exposed to water
. has not been exposed to high or low temperatures
But there are situations when the card can fail and not through the fault of its owner. For example, at the airport, the baggage must be “illuminated” with X-rays, which can affect the performance of the memory card. Considering all these and many other factors, we strongly recommend choosing a memory card for your digital camera from a manufacturer that guarantees protection against all of the above negative influences.
Which company to choose a memory card?
It is best to purchase memory cards from reputable brands. For example: Sandisk, Kingston, Samsung, Transcend and others. In our opinion, Sandisk memory cards showed a high level of reliability and the ability to withstand the effects of negative factors.
- Mydisktest. a program for testing USB Flash drives for bad areas
- Panasonic SD formatter. heals and restores almost any flash drive for mobile devices and not only
- Check Flash. designed to check the performance of flash drives, and also allows using tests to determine the instantaneous read / write speed
How to format a memory card
Attention, like all manufacturers in their instructions, we advise you to format any memory card once every 2 months at least if you want to extend its life. This can be done both with the built-in means of a camera or recorder, and on your computer. Never format an Sdxc memory card (often with a capacity of 64gb or more) in Sdhc-compatible devices. Your card reader or adapter must be able to work with Sdxc.
You can use a special PC or MAC program called SD Card Formatter. Set the options in the settings as shown in the figure on the right.
Which memory card to choose for the DVR
Today we will talk about memory cards for DVRs and action cameras. I think you know that not every memory card will work correctly in your recorder. How do I choose the right memory card? What to look for when choosing a memory card and which models / brands to recommend?
You’ve probably seen that many memory card manufacturers offer long warranties, ranging from 3 to 5 years or more. And even a lifetime warranty. Alas, this warranty has limitations, usually indicated in small print in the terms and conditions, and of course, does not apply to devices with frequent data overwriting, such as action cameras and DVRs. Therefore, do not rely on full warranty service when used in registrars. For example, here is a screenshot of the Samsung card warranty terms using one example:
How to choose a memory card
Without going into the technical details of memory chips (MLC NAND is better) and specifications, pay attention to the 2 main characteristics of the card indicated right on it. These are speed class (class 10) and UHS parameter (U1 or U3).
- 2 channel device
- 1 channel device with an average recording bit rate
- QHD (2k) device
Ordinary Class 10 memory cards with the U1 index and write speeds from 18 to 22 mb / s are still suitable for you. It should be borne in mind that a class 10 card provides a minimum speed of 10mb / s, and this may not be enough in most modern DVRs. Therefore, you should not just be guided by the class. Do not look at loud writing on the packaging of memory cards. Usually, the speed is indicated not for writing, but for reading. It is the recording that is important to us, as a rule, this characteristic is many times more modest than reading, so marketers try to hide it. If you have:
- 4k action camera / dvr
- DVR with QHD resolution for 2 cameras
- very high bitrate recording device
Most likely you will need a Class 10 memory card with the U3 index. It provides minimum recording speeds up to 30mb / s. In some cases, this will not be enough, so for 4k with a bitrate of more than 70-100mbit / s, we recommend top (or pre-top) cards with the U3 index in the lineup of various brands, where the write speed is from 50mb / s.
Why Not Any Card Will Work
Modern DVRs record in HD / FullHD / QHD resolution, and every year there is a trend towards an increase in the number of pixels. But, in addition to the resolution, there is also a bit rate. This is the speed of the recorded stream to the memory card, depending on the model, even with the same resolution, this parameter can vary quite a lot. The manufacturer of the DVR often writes in the instructions. support for MicroSD memory cards (the most popular format) up to 32/64/128 / 256GB class 10. But he usually does not write anything about the bitrate of his stream. You can find out these numbers only by looking at the technical information of the recorded video or the profile thread of the forum of the selected gadget model.
How to find out the speed of the WRITE to the memory card?
Only empirically through special programs. Before buying, you need to look for tests on the memory card of your choice on the Internet and see the write speed. Alternatively, you can test the memory card yourself using the CrystalDiskMark program. Please note that many cards show the maximum write speed only if you have a card reader with USB3.0 support, the same should be your USB port in your laptop or computer. When testing, the computer should not perform any other tasks.
Best memory card for dash cam
Unfortunately, not all memory cards of even famous brands are so reliable. Recommended brands to look out for: Sony, Toshiba, Lexar, Transcend, Samsung, Pny.
Finally, let’s see a list of specific memory cards that we recommend for purchase and use.
You will find TOP 5 of the most popular memory cards in our other article, here.
In the segment of normal recording from 15 to 22 mbit / s index U1
- transcend premium 300x 16/32/64
- transcend premium 400x 16/32/64/128
- transcend high endurance U1 16/32/64
- transcend ultimate 600x 8/16/32
- toshiba exceria U1 16/32/64/128
- lexar high endurance U1 16/32/64
- lexar 300x U1 16/32/64
- lexar 600x U1 16/32/64/128
- sony SR-UY3A U1 16/32/64/128
- Samsung evo U1 16/32/64/128
In the segment of increased bitrate up to 50m mbit / s U3 index
- sony SR-UX2A u3 16/32/64/128
- toshiba exceria U3 32/64
- transcend ultimate U3M 16/32/64/128
- Samsung pro U3 16/32/64
- Samsung evo U3 32/64/128/256
- viofo U3 32/64
- transcend USD300S 16/32/64/128
- transcend C10V High Endurance 16/32/64/128
- viofo Professional High Endurance
In the segment of high bitrate from 80 mbit / s U3 index
- transcend ultimate 633x U3 32/64
- toshiba exceria PRO U3 32/64
- lexar professional 1000x 32/64/126/256
- lexar professional 1800x 32/64/128
- Samsung pro U3 32/64/128
- viofo U3 32/64
- transcend USD500S 16/32/64/128
Brands that are not recommended for purchase for use in DVRs: Smart Buy, A-Data, QUMO, various “branded” Chinese memory cards and other noname.
For 4k action cameras, cards from Sandisk or Kingston with the index U3, v30, A1 may be suitable. They work for a long time, since the action cameras do not record continuously.
The need for spare parts
It should be borne in mind that a hard drive is a consumable part for a video surveillance system. Sooner or later, it will fail. It is advisable to change it even before it “dies”, because this does not happen all at once. Specialized software can regularly assess the status of the drive and notify you of possible problems. Availability of spare parts and accessories. will allow you to timely change disks that have exhausted their resource.
What affects the size of the archive?
In this article, we will analyze the calculation of the video surveillance archive. The calculation will show how much hard disk (HDD) is needed to store the video surveillance archive on a server or video recorder, or on a microSD card of an IP surveillance camera.
Camera resolution is measured in megapixels and shows how many pixels (the smallest details) of the image are on the horizontal and vertical sides of the video camera matrix. for example, 1920 × 1080 (2MP 16: 9). Multiplying 1920 pixels by 1080 pixels, we get 2,073,600 pixels, i.e. those same 2 megapixels. 16: 9 indicates the aspect ratio of the image.
The most common at the moment is the resolution of 2 megapixels.
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The higher the image resolution, the more detail can be saved to analyze information about the incident. But not everything is so simple. The image quality is influenced by many factors. lens optics, sensor sensitivity, codec and image compression rate. The higher the resolution of the matrix with the same physical size, the lower its light sensitivity, i.e. the ability of the camera to “see” at low light levels, in the dark.
It should also be borne in mind that the higher the resolution of the camera, the more it “loads” the local area network (LAN) for IP video surveillance. The more the size of the archive is required, which can significantly affect the cost of the system. At the same time, there are times when a camera with a lower resolution can solve the same problem better and cheaper than a camera with a higher resolution.
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Therefore, when calculating a video surveillance system, special criteria are used. pixel density. Pixel density shows the number of pixels per meter of a real object. This calculation helps to efficiently use the resources of the camcorder. It is important to maintain a balance. to find the minimum sufficient camera resolution that meets the criteria for solving a specific target video monitoring task.
To select the installation site and performance characteristics of the camera, you can use the professional software for sketching design of the video surveillance system IP VIDEO SYSTEM DESIGN TOOL.
Recording type: permanent or event
Archive recording can be carried out continuously, according to schedule and by event. Constantly. means that the camera is recording 24/7. On schedule. for example, only during business hours. Or vice versa. only on holidays and non-working hours. By event. only when a specific event occurs. For example. triggering a motion detector in the camera. Or when integrating a video surveillance system with an object’s burglar alarm. when a security sensor is triggered. And when integrated with an access control and management system. when reading an access card.
In this case, as a rule, the system has a setting for “pre” and “post” recording. so that before and after the event, small fragments were recorded. It’s easier to perceive what happened during the event itself.
Recording types can be combined. For example, we write constantly during working hours, and during non-working hours. according to movement in the frame or when a security sensor is triggered. The choice of the recording type helps to save on the archive without degrading the quality of the archive itself.
To calculate, we need to know the average write percentage.
The archive depth shows in how many days the oldest record will be “replaced” by the newest one in a cyclic record type. For some types of objects, the depth of the archive can be set by law. These can be facilities with a requirement for anti-terrorist security: sports facilities, facilities with a mass presence of people, objects of the transport information structure.
The deeper the archive, the more hard disks are required to store it. Reducing the volume of hard disks at the same archive depth is possible only by degrading the quality of stored records. by decreasing the video resolution, frame rate, using more efficient interframe compression codecs and increasing the compression ratio.
Video compression codec
The same camera with the same resolution can generate significantly different traffic volumes. It depends on the efficiency of compression of the information transmitted from the camera. To do this, use the compression codec settings.
Codecs are divided into frame-by-frame (where compression occurs only within each image frame) and inter-frame (where not all frames are transmitted, but only “reference” ones and frame changes relative to the reference frame). Now the most common codecs with interframe compression are H.264 and H.265. Their advantage is a high degree of video compression, which saves on building local networks for video surveillance and significantly saves space in the archive. Of the frame-by-frame codecs, MJPG is still used. Due to the fact that the frame-by-frame codec transmits all frames (which leads to an increase in the data flow from the camera), video image analysis algorithms work much better on MJPG. automatic recognition of license plates, faces, etc.
Therefore, modern cameras allow you to choose which codec to use. In addition, you can customize the compression rate of the codec. For those cameras that solve the problem of detecting motion in the frame, general monitoring of the situation. you can sacrifice the quality of the picture, but save on the volume of the archive. Where it is required to solve problems of identification or discrimination, it is worth choosing a lower compression ratio so as not to lose an important part of information about the subject of photography. For tasks where freeze frame is important, it is better to use frame-by-frame compression codecs. MJPG. This will provide software algorithms with undistorted information for analysis, which will significantly affect the likelihood of identification.
Review: IP cameras for network video surveillance systems
IP cameras. Explosion-proof IP cameras. Multi-sensor cameras. High-speed PTZ models with multiple zoom function
An IP video camera has a basic purpose. conduct video surveillance of all the necessary objects: be it certain objects or even people. An analog camera can cope with such a simple task. But the desire to get a better image or have one single system consisting of several cameras scattered in different corners. all the same encourages to use an IP video camera.
Oddly enough, every day the requirements and desires for equipment are growing at lightning speed. And therefore, the market offers a fairly wide selection of IP cameras. Already today you can get confused about the number of brands, models and even the characteristics of equipment. In addition, for different purposes and different premises, everything is the same. different IP cameras.
For example, a camera for an apartment definitely cannot be used outdoors, and vice versa. But regardless of modifications and manufacturers, all IP cameras are connected to Ethernet, have support for remote access using a regular browser, work with LAN / WAN networks, and so on.
Let’s then figure out which camera is better to choose and where it should be used.
Outdoor IP Cameras
Surely, if not all, then the majority are familiar with street cameras. This type of IP cameras is mounted and used exclusively outdoors.
Endowed with special protection against dust / moisture and other unwanted effects;
Adapted to different weather conditions: for example, work at 50 degrees;
Additional infrared illumination;
The ability to remotely configure various indicators (for example, viewing range).
In addition, some models of outdoor cameras are even capable of checking the entire perimeter and providing an approximation if necessary.
High-speed PTZ models with multiple zoom function
What is special about PTZ video camera? The name speaks for itself: the camera has a special video module that can turn around in place, as well as move horizontally or vertically. That is, the camera can be rotated 360 degrees, which provides the entire field of view.
Also PTZ video camera has a special zoom. With the help of this element, the camera is able not only to enlarge specific fragments, but also to do it quite quickly.
All this. tilts, rotations, zoom and the like. is performed not only under certain instructions (commands). Having set up the camera, it itself is able to perform these functions without a reminder.
Explosion Proof IP Cameras
Such cameras are used exclusively in rooms where there is a direct threat of explosion. There is even a special condition for specialized gas processing and production enterprises. use only explosion-proof cameras.
That is why all explosion-proof chambers have an additional protective shell in the form of metal or steel.
As for other characteristics, the chambers are quite corrosion-resistant, provide uninterrupted operation at high temperatures and their drops. And also thanks to its body, the camera is protected from gases, steam, dirt, dust and so on.
The name is already promising. What does this mean and what is the peculiarity of multi-sensor cameras?
Multi-sensor cameras. fairly modern equipment, they are among the latest models. This IP camera has an important feature. she shoots in panoramic size. In addition, the camera has 4 special sensors, which are equipped with a fixed or varifocal lens, the zoom of which is about three times. As for the panoramic picture. it is formed using the special function “3D gluing”.
Multi-sensor cameras have a number of advantages, including:
The camera is capable of capturing the entire territory at the same time;
Sufficiently high resolution (from 30 megapixels and more).
These are the advantages that make multi-sensor cameras stand out from others.
Dedicated video device
The main feature of this type of cameras. this is the use in rooms with a fairly limited area. Visually, such a camera has several components:
The advantage of such a camera is that it can still be moved after installation. And also cameras can easily adapt to sudden changes (for example, lighting).
In addition, a specialized video device has all the necessary certificates, and also meets all requirements and standards.
Buying an IP video camera from DEPS
The DEPS catalog has a fairly wide selection of IP cameras for different objects and purposes. Our experts will help you choose the equipment exactly for your task.