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What bitrate can you expect with MPEG?

What (approximate) bit rate can be expected from MPEG encoders to create an "ok-quality" 160x120 webcam stream?

How much will the processor require? Decoding?

Are there any better encoding formats for this purpose? (In terms of baud rate or processor)

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1 answer


256 KBps

enough for QSIF

( 160x120

, 25 fps

) in MPEG2

.

Anyone modern CPU

(since Pentium IV

) can encode and decode it in real time.

There are hardware solutions (for example, Compro VideoMate

H900

and E800

series), the cost of which is 100$

up to 8

, which can be installed on PC

.



By using them, you can get 8

full size streams right off the bat, never mind QSIF

.

MPEG4

will probably give better results in terms of throughput, but it is more sensitive to packet drops on the link.

As for the sound, if you want telephony quality, you can use the codec aLaw

or uLaw

, which is required 64 kbps

for each channel, and this is not a problem even for a calculator Casio

.

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