Appendix C: Bandwidth and Video Size Estimation
The frame rate of video transmitted from the IR IP Camera depends on connection bandwidth between client and server, video resolution, codec type, and quality setting of server. Here is a guideline to help you roughly estimate the bandwidth requirements for your IR IP Camera.
The required bandwidth depends on content of video source. The slow motion video will produce smaller bit rate generally and fast motion will produce higher bit rate vice versa. Actual results generated by the IR IP Camera may be varying.
Image Resolution | Average range of Data Sizes | Average bit rate for MPEG4 mode |
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160 x 120 (QQVGA) | 3 ~ 6k byte per frame | 64kbps~384kbps @ 30fps |
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320 x 240 (QVGA) | 8 ~ 20k byte per frame | 128kbps~768kbps @ 30fps |
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640 x 480 (VGA) | 20 ~ 50K byte per frame | 256kbps~4096kbps @ 30fps |
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Note: Audio streaming also takes bandwidth around 5 kbps to 64kbps. Most xDSL/Cable modem upload speeds may not even reach up to 128 kbps. Thus, you may not be able to receive any video while streaming audio on a 128 kbps or lower connection. Even though the upload speed is more than 128kbps, for optimal video performance, disabling audio streaming will get better video performance.
MJPEG| Resolution | Quality setting | fps setting | Current stream | Current fps |
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| 320*240 CIF | Best | 5 fps | around 2300Kbps | 5 fps |
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320*240 CIF | Best | 15 fps | around 6700Kbps | 14.7fps |
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320*240 CIF | Best | 25 fps | around 14300Kbps | 28 fps |
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320*240 CIF | Normal | 5 fps | around 400Kbps | 4.2 fps |
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320*240 CIF | Normal | 15 fps | around 1200Kbps | 13 fps - 14 fps |
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320*240 CIF | Normal | 25 fps | around 1700Kbps | 30fps |
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320*240 CIF | Lowest | 5 fps | around 350Kbps | 4.2 fps |
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320*240 CIF | Lowest | 15 fps | around 1100Kbps | 13 - 14fps |
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320*240 CIF | Lowest | 25 fps | around 2000Kbps | 25 fps |
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