Bandwidth is one of the most fundamental, complex and overlooked aspects of video surveillance.
Many simply assume it is a linear function of resolution and frame rate. Not only is that wrong, it misses a number of other critical elements.
The most basic commonly missed element is scene complexity.
Contrast the 'simple' indoor room to the 'complex' parking lot:
Even if everything else is equal (same camera, same settings), the 'complex' parking lot routinely requires 300%+ more bandwidth than the 'simple' indoor room because there is more activity and more details.
Making it tougher, while it is easy to contrast scenes like the 2 above, there's no simple way to gauge relative scene complexity. And, even with scene complexity factored in, many other drivers exist.
In this industry leading guide, we break down 10 total drivers including:
- Resolution: Does doubling pixels double bandwidth?
- Compression: How do compression levels impact bandwidth?
- CODEC: How does CODEC choice impact bandwidth?
- Framerate: Is 30 FPS triple the bandwidth of 10 FPS?
- Low light: How do low lux levels impact bandwidth?
- Field of view: Do wider views mean more bandwidth?
- Sharpness: How does this oft-forgotten setting impact bitrate?
- WDR: Is bitrate higher with WDR on or off?
- Color: How much does color impact bandwidth?
- Manufacturer model performance: Same manufacturer, same resolution, same FPS. Same bitrate?
Understanding bandwidth is critical because it impacts network load and storage use / cost.