To ensure optimal performance, do not exceed the maximum number of cameras that can be viewed on each client workstation type in Security Center 5.9.
The maximum number of H.264 camera streams supported by each client workstation profile is as follows:
H.264 format | |||||
---|---|---|---|---|---|
Resolution @ 30 fps | CIF 352 x 240 |
VGA 640 x 480 |
HD 1280 x 720 |
Full HD 1920 x 1080 |
Ultra HD 3840 x 2160 |
Average bit rate per camera1 | 350 Kbps | 1,100 Kbps | 2,300 Kbps | 5,500 Kbps | 50,000 Kbps |
Minimum | 14 | 6 | 2 | 1 | 0 |
Recommended2 | 60 | 47 | 23 | 11 | 6 |
High performance2, 3 (Video intensive configuration) |
78 | 58 | 50 | 26 | 8 |
1 These are estimates, and cameras from different manufacturers may vary in bit rate at the same resolution and frame rate. Decoding performance can also vary from one manufacturer to another.
2 With hardware acceleration enabled.
3 Using one video card NVIDIA® GeForce GTX 1060 with 6 GB of RAM.
Performance benchmark for HEVC (H.265)
The following benchmark illustrates the average bit rate of a camera streaming at 20 fps using HEVC (H.265) video format.
The viewing workstation has a 4th Generation Intel® Core™ i7-4770 @ 3.5 GHz processor, with 16 GB RAM, an SSD hard drive, and runs Windows 8.1. The video card used is an NVIDIA® GeForce® GTX 1060 with 6 GB of RAM connected to a 4K monitor.
H.265 format | ||||
---|---|---|---|---|
Resolution @ 20 fps | VGA 640 x 480 |
HD 1280 x 720 |
UXGA 1600 x 1200 |
Full HD 1920 x 1080 |
Average bit rate per camera | 115 Kbps | 445 Kbps | 730 Kbps | 3,000 Kbps |
Maximum number of cameras | 77 | 51 | 31 | 24 |
Encryption impact on workstation performance
Video encryption can increase the CPU usage by up to 40% when viewing low-resolution video (CIF). The impact becomes less noticeable as the resolution of the video increases, because much more processing power is spent on decoding the video than on decrypting the video. The impact on performance becomes unnoticeable when viewing HD and Ultra-HD video.
Watermark impact on workstation performance
Video watermarks are rendered by the client workstation. This extra load reduces the maximum number of live and playback video streams that can be displayed simultaneously. On average, the maximum number of tiles that can be displayed when hardware acceleration is enabled is reduced by 10%. This reduction reaches 30% on machines without hardware acceleration. The performance impact increases with the video resolution.