Higher v4l resolution?

[Jonathan Kamens <jik (at) kamens.brookline.ma.us>]

OK, here's what I get about the answers people have sent to my
question about the relatively small resolution I'm getting from v4l
with my TV card....

I understand that the vertical resolution of the picture is limited by
the low number of scan lines in the NTSC or PAL standard.  But isn't
each scan line an analog signal, and hence couldn't the horizontal
resolution be a lot higher than the 4:3 horizontal:vertical ratio
that's being returned by v4l?

If so, then wouldn't it be feasible to do with the TV image what is
done, for example, with low-resolution faxes -- make each pixel twice
as tall as it is wide, or even three times as tall if the horizontal
resolution can be made that fine?

Does any TV card support that kind of thing, and if so, does v4l know
how to handle it?

Thanks,

  jik

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