6 Nov
2008
6 Nov
'08
5:53 a.m.
Pete Turnbull wrote:
Doesn't help if you only have 3 x BNC, of
course; you'd at least have to construct a sync separator, but that's
potentially just a one-chip stripboard design.
I'm not sure how easy a sync separator is. I seem to remember there's a
SAA-family chip that'll do it, but I'm not sure how obtainable those are these
days.
I suppose finding a junk old monitor with sync-on-green / combined sync
ability might source some useful parts. I don't know how easy it would be to
build something out of passive components / 74xx logic parts...
If there's a way of doing it reasonably easily then that'd be a good route -
build a sync splitter and then feed the output into a PC-based capture card.
Another option might be to convert the video to composite and feed it into a
PC-based TV capture card (some of these seem to have composite inputs) - but
I'm not sure if there are problems there either with using composite for high
resolutions or with the capture card expecting only a set of "TV" resolutions
and barfing on something different.
cheers
Jules