technical knowledge

23 2026-08

What is Wide Dynamic (WDR)? Why must the backlight scene be turned on?

Explain the principle of wide dynamics and the numerical meaning of dB, and explain the configuration points of strong backlight environment...

218  ·  2026-08-23 21 2026-08

Low-light and starlight cameras: how 0.001Lux is achieved

Analyze the test conditions and meaning of the minimum illumination index, and explain the impact of large target area sensors, large apertu...

247  ·  2026-08-21 19 2026-08

The principles, effective distance and common misunderstandings of infrared night vision

Explain how infrared fill light works, the gap between nominal distance and actual effect, and how to deal with common problems such as refl...

272  ·  2026-08-19 17 2026-08

The relationship between code stream, code rate and frame rate and setting suggestions

It clarifies three easily confused concepts, gives recommended parameters in different scenarios, and strikes a balance between image qualit...

301  ·  2026-08-17 15 2026-08

How to calculate monitoring storage capacity: comparison of resolution, bit rate and storage days

Provides practical calculation formulas and cheat sheets for storage capacity, and explains hard disk formatting loss, redundancy design, an...

330  ·  2026-08-15 13 2026-08

Differences and selection suggestions between H.264, H.265 and H.265+

Comparing the compression efficiency, compatibility and hardware requirements of the three generations of video coding standards, it explain...

359  ·  2026-08-13 11 2026-08

What is dual stream? How to configure the main code stream and sub-code stream

Explain the function and typical configuration of dual streams, and explain the optimization method when multi-channel mobile phone preview...

388  ·  2026-08-11 09 2026-08

The difference between CBR and VBR and its applicable scenarios

Fixed bit rate and dynamic bit rate each have their own advantages and disadvantages. How to choose is explained based on storage budget, ne...

404  ·  2026-08-09 07 2026-08

The impact of GOP and I frame intervals on image quality and bandwidth

Explain the role of the GOP structure and I/P frames, and explain why video dragging and positioning are slow and the picture is occasionall...

433  ·  2026-08-07 05 2026-08

What is the ONVIF protocol? Why third-party docking is inseparable from it

Introducing the role of ONVIF, commonly used Profiles and limitations in actual docking, and explaining "what it can and cannot solve".

463  ·  2026-08-05 03 2026-08

Differences and application scenarios of RTSP, RTMP, and GB/T 28181

Distinguish the application positioning of three common video transmission protocols: LAN streaming, Internet live broadcast, and domestic r...

132  ·  2026-08-03 01 2026-08

How to determine the installation height and angle of surveillance cameras

The installation height directly determines whether the human face can be seen clearly and whether it is easily damaged. Recommended heights...

162  ·  2026-08-01