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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
for JPEG mode
Average bit rate for MPEG4 mode
160 x 120 (QQVGA) 3 ~ 6k byte per frame 64kbps~384kbps @ 30fps
320 x 240 (QVGA) 8 ~ 20k byte per frame 128kbps~768kbps @ 30fps
640 x 480 (VGA) 20 ~ 50K byte per frame 256kbps~4096kbps @ 30fps
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
320*240 CIF Best 5 fps around 2300Kbps 5 fps
320*240 CIF Best 15 fps around 6700Kbps 14.7fps
320*240 CIF Best 25 fps around 14300Kbps 28 fps
320*240 CIF Normal 5 fps around 400Kbps 4.2 fps
320*240 CIF Normal 15 fps around 1200Kbps 13 fps - 14 fps
320*240 CIF Normal 25 fps around 1700Kbps 30fps
320*240 CIF Lowest 5 fps around 350Kbps 4.2 fps
320*240 CIF Lowest 15 fps around 1100Kbps 13 - 14fps
320*240 CIF Lowest 25 fps around 2000Kbps 25 fps
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