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Example 3: H.264 recording
• Image recording from 8 cameras (VB-M40).
• Image size is 320 x 240 and image quality is 3.
• Recording frame rate is 30 fps.
• Data size per second is approximately 84 KB.
Although the actual recording file size depends on the objects recorded by each camera, this calculation assumes the
typical sizes given above.
If H.264 images from 8 cameras are recorded at 30 frames per second in continuous recording mode, the required hard
disk space is approximately 55 GB per day (= 84 KB x 8 cameras x 60 seconds x 60 minutes x 24 hours = 58,060,800 KB).
Note that the actual recording file size may be different from the size in the table, depending on the weather conditions and
the complexity of the scene. For example, images of an empty corridor, would typically result in values smaller than the
above values. Conversely, complex scenes, such as a crowded shopping mall, would result in larger values.
The following tables shows typical data sizes per frame (in KB) for various combinations of image quality and size settings.
Example of the Data Size for the VB-M700F/VB-M600D/VB-M600VE/VB-M40 (JPEG)
Image
Quality
160 × 120
1
2.0
2
3.0
3
3.7
4
4.7
5
7.4
Example of the Bit Rate for the VB-M700F/VB-M600D/VB-M600VE/VB-M40 (H.264)
Image
Quality
320 × 240
1
0.10
2
0.17
3
0.30
4
0.41
5
0.55
24
Image Size
320 × 240
640 × 480
1280 × 960
5.2
16.0
51.6
8.3
25.8
83.3
10.4
32.5
110.0
13.6
43.2
152.6
22.9
78.1
280.9
(Units: KB)
10 fps
640 × 480
1280 × 960
320 × 240
0.33
1.04
0.14
0.55
1.66
0.24
0.95
2.82
0.41
1.33
3.74
0.57
1.85
4.70
0.76
Image Size and Frame Rate
15 fps
640 × 480
1280 × 960
0.44
1.47
0.73
2.31
1.26
3.38
1.82
4.51
2.50
5.84
30 fps
320 × 240
640 × 480
1280 × 960
0.22
0.74
2.47
0.38
1.22
3.55
0.67
2.08
5.12
0.92
2.91
5.96
1.27
3.89
5.34
(Units: Mbps)
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