Vertical Sync Interrupts

[Sportive]

Hello all,

I have found a previous thread on this topic but most of it seemed to be concerned with "forum etiquette" rather than the actual subject!!

I have built a totally new DTV system (after months of despair with my G400 system) which basically copies a machine I had where everything was working perfectly. I am using a G200 & SB Live (different IRQ's) and have come up with a problem never before encountered.

When using Ulead Video Capture occasionally (and not necessarily on frame 59 etc..), either only a few frames are captured or I get a message saying "no frames captured, confirm that vertical sync interupts are configured & enabled"

What on earth does this mean? My BIOS settings are exactly as suggested by Matrox and I never had this problem before with exatcly the same G200/SBLive/Chaintech MB config.

If I close Video Capture & start again things seem to work for a capture or two and then it goes again.

I have hours & hours to video to capture and edit dating back 6 months due to my previous G400 problems.....can anyone please help!!?

I am very grateful for all those that have helped me in the past and would love to contribute help in some way myself...if I knew what I was talking about!

Many thanks

Andrew

[dchip]

You'll definately need someone more technically inclined than myself to respond but I seem to recall some years ago I had a Hauppaugue card that had probs with vertical sync interrupt and I ended up having to change a jumper on the card or doing a card shuffle in my system until the problem was eliminated. I am guessing that ULEAD uses some sort of Microsoft video capture and it is being picky about the interrupts, memory base addresses etc. in your system. Anyone?

[Sportive]

Hmm, interesting. The PC is virtually identical in every way to a set up that I had working last year (it's all the same bits). The only PCI card I have is the SB Live and that is in the same slot and on IRQ10 (the G200 is on IRQ11).

Is it worth moving the card about?

Andrew

[johnpr98]

http://support.ulead.com/kb/0002/KB199.htm

or
Not an answer, but some posts to peruse from a google.com search

http://www.google.com/search?q=Vertical+Sync+Interrupts+&btnG=Google+Search

johnpr98

http://www.johnpr98.com

[This message has been edited by johnpr98 (edited 18 March 2001).]

[Sportive]

Thanks very much indeed.

The links led me to the conclusion that my BIOS must be wrong and I noticed that "Assign IRQ to VGA" was disabled.

So far so good, this could have been the problem but I will do some more intensive testing.

I am most grateful.

Andrew

P.S. Of course I'll be back with another query if it happens again :-O