[AG-TECH] linux video capture

[John Hodrien]

On Wed, 16 Mar 2005, Robert Olson wrote:

> What you might be seeing is this:
>
> On linux, vic captures via v4l at 352x288. On a BT848-flavored card (I think 
> the Ospreys fall in this class as well as the Hauppauge cards), capturing at 
> more than 240 lines causes teh capture to happen from both fields, as NTSC 
> video is two fields of 240 lines each. Hence, you get interlacing effects.
>
> As I recall with vic on windows, it captures at 320x240, so the data comes 
> from a single field and hence has no interface artifacts.

Isn't that just the difference between 1/4 PAL and 1/4 NTSC.  We capture at
1/4 PAL on a BT848 with no interlacing problems.  If you can flick your
cameras into PAL mode, and capture at that res, all should be fine I think.

jh