Why can't the camera video be saved?

What is the reason why the self-memory surveillance camera is no longer available?

If the video of the surveillance camera with its own memory is not saved, there are the following possibilities:

There is something wrong with the memory card.

The video recording mode is set incorrectly.

There is something wrong with this camera.

The purpose of the memory card:

1. is used to store photos on a digital camera.

2. Used to store music, files, movies and videos on the mobile phone.

3. Used to store video on DV (digital camera).

4. Used to store data in GPS.

5. Used to store program software in industrial control.

6. Used for MP3, MP4, digital recording pen, etc.

Precautions for checking the memory card:

1, compatibility

Just like DIY computer hardware, memory cards also have compatibility problems. There are also some incompatible problems between different brands of memory cards and digital cameras. Mainly manifested in the card reading time is too long, the access speed is longer, or there is a crash. So when buying a memory card, be sure to remember the memory card model corresponding to the machine. It's safer to try the machine yourself.

2, packaging and appearance work

Pay attention to whether the printing quality of the package is clear and whether there are anti-counterfeiting labels. If you can use 800 to check the authenticity, you'd better call down and ask. Finally, look at the overall manufacturing situation of the card, whether the edge of the card has deformation, bulge, crack, burr and symmetrical cutting angle.

3. Warranty time

Generally, miscellaneous brands are guaranteed for one year, while big manufacturers like SANDISK are guaranteed for five years, so when purchasing the machine, be sure to ask about the warranty time of the purchased memory card and ask for the relevant invoice receipt. 6. Memory card is a kind of mobile device suitable for mobile phones, and it is generally1g.2g.4g.8g.16g.32g. ..

The working principle of the camera:

The working principle of the camera is roughly as follows: the optical image generated by the lens of the scene is projected on the surface of the image sensor, then converted into an electrical signal, converted into a digital image signal after A/D (analog-to-digital conversion) conversion, then sent to a digital signal processing chip (DSP) for processing, and then transmitted to a computer for processing through a USB interface, and the image can be seen through a display.

Debugging method of camera:

(A) external erection of CRT display circuit connection

Power supply, grounding and signal leads are led out from the analog camera to supply power to the camera, and then the video signal line is connected to the video input interface of the TV box. The VGA-OUT of the TV box is connected to the CRT display, so that the CRT can display digital camera pictures. This method is completely hardware-level display, which provides the same display effect as human vision, and is very helpful for camera installation and physical parameter correction.

(2) off-chip extended LCD liquid crystal

HCS 12 MCU has built-in SPI (serial peripheral interface), which can realize data transmission between MCU, and the speed is faster than that through serial asynchronous communication (SCI). SPI module also supports bidirectional, synchronous and serial communication between MCU and peripheral devices to realize peripheral expansion of MCU.

1. The display character prompts the relevant operating parameters of the system in the form of characters when the system is running. Each character occupies an 8*6 dot column and needs 6 bytes of data. To complete the character display, you only need to write the corresponding data into the designated bit in the programming. Because the LCD module itself has no font, at the beginning of the program, it is necessary to define the liquid crystal display dot matrix data of ASCⅱⅱ table characters, that is, a two-dimensional array with the size of N*6 bytes.

2. Show pictures. The video signal collected by analog camera is digitized by MCU's A/D, and the information is stored in a 40*70 two-dimensional array, and then the array is binarized, which can be displayed in the LCD module with 48*84 resolution, so that developers can observe the camera machine vision in real time.

This method is a combination of software and hardware display method, which can track and display the camera-related information in real time without interrupting the system operation process.

(c) Self-programming serial communication host computer software.

The SCI module of single chip microcomputer is used to send image data to PC, and the upper computer uses MSCOMM control to program and read communication data. After reading the data, you can use the powerful data processing ability and picture display ability of windows program to process the picture data, such as redrawing the picture according to the data, filtering and analyzing the array and displaying the filtering effect, and exporting the received array to a file to provide data sources for computer simulation.

This method is a complete software display method, which can realize a series of processing on PC only by receiving the data of single chip microcomputer, and has unparalleled advantages in testing the effect of graphic transformation, filtering analysis and data simulation.

Why can't Hikvision's hard disk video recorder save videos?

Hikvision cameras can't play back for two main reasons.

1, reasons related to the hard disk. Abnormal operation of hard disk, hard disk damage, abnormal working voltage of hard disk, etc. It will cause abnormal recording, so it cannot be played back.

2. Reasons related to settings. The recording configuration is not set, or the setting is wrong, or the setting is incomplete. Resulting in no recording, incomplete recording, no playback or incomplete playback.

Solution:

1, add hard disk. If you already have a hard disk, check whether the connecting cable is in good contact. If it is a voltage problem, please replace a good quality power adapter. Built-in power supply is convenient for maintenance.

2. Reset the video parameters. And after a few minutes, test playback.

Why can't I save the icon without video on my mobile phone when I watch the surveillance playback?

Error in saving method. Specific operation method:

1, the camera comes with an app video, open the app of the camera, and play the video in the cloud or without a card. There will be a video recorder icon on the application panel. Click the icon to save the video you are watching.

2. Download the screen recording software. If you can't find the video button on the camera APP, you can download a screen recording APP online, turn on the screen recording function and click the camera app to play the video you need to download to complete the video recording. After saving, you can view the file storage directory specified by the screen recording software and see the corresponding video.