Quoting Hans Verkuil <[EMAIL PROTECTED]>:

> Using an mpeg encoder card seems like overkill to me. The only advantage
> this card may have over a 'normal' TV card is that you don't need an
> audio card as the audio is available directly from the mpeg card.
> Normal TV cards require an audio line-in.
I'm pretty sure this is not the case for more recent bt878 and cx88 
based cards.
I know that most bt878 cards have the btaudio driver for capture from the
card's own line-in or (in the case of a board with a tuner, the tuner's audio
output).  I do recall seeing that while the cx88 hardware supports 
audio, there
may not be driver support for it yet.

A bt878-based card is probably the best one for this application as I believe
the cx88 drivers are still considered highly experimental while bttv is
INCREDIBLY mature, I think most of the Hauppauge WinTV (non-PVR 
version) boards
are still based on the 878 and not the newer cx88 chip.

The bt878 hardware can definately handle 640x480 at 30 fps, assuming that your
processing algorithm can handle the job.


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