DVD-Software.info

[Popeye]

I'm interested in using an NTSC capture card (like the excellent Fusion
PCI and USB cards:
http://www.fusionhdtv.co.kr/eng/Products/HDTV5usb.aspx) to look at the
video on an RF signal in the form of a vectorscope (and waveform
monitor) so that I can adjust an RF modulator.

Do you know a way to do this?

I think a good way to do this (in MS Windows) would be to make a
DirectShow filter.

I noticed that VirtualVCR has a DirectShow filter called histogram.ax
that is vaguely simliar.

I also noticed that Winnov has exactly what I want:
http://www.winnov.de/index.php?option=com_content&task=view&id=102&Itemid=131
.... and has a DirectShow filter : VectorScopeFilter.ax , but when I try
to use it in GraphEdit, I get an error message: The filter could not be
created. Resources used by this filter may already be in use".

I'm open to a Linux solution as well.

[John F. Miller]

It depends on how much of the video signal you need to be able to monitor
and adjust. For example, if you want to see the sync pulses, all 525 scan
lines, the color burst and the chroma signals at their 3.58MHz, you won't be
able to do that with a typical PC capture card. Of course, you'll need a
suitable RF demodulator.

Personally, I'd use an oscilloscope. I got an excellent 100MHz dual-beam
Tetronix off eBay for $150.

John.
--
John Miller
http://www.enosoft.net/
high performance tools for music and video