Anyone ever reclocked a PCI Card?

[e.lectronick]

Tiroth,

Yeah, you're right about needing a lot of real estate to capture uncompressed. I'm looking at a pair of the new Maxtor Diamondmax 10 300GB SATA drives with 16MB buffers in a RAID 0 configuration. That should take care of it in terms of speed and size.

From what I've read, however... Hold on, I need to switch computers to finish this thought...

[e.lectronick]

I'm back. Where was I?

From what I understand, the kind of drift I'm referring to is prevented by doing what pro studios do: using a black burst generator that feeds the clocks of all the equipment in the studio; from analog VCRs, to digital sound and video devices...all the way to the software editors and sequencers (running on SMPTE timecode for instance). With everything locked to the same count, or divisions therein, there is no problem with sync. And these studios use the same software the consumer does: Sony Vegas, Adobe Premiere, Avid, Final Cut Pro, Logic etc... The fact that every pro video studio runs on some form of Master Clock and Timecode must mean it's important. One has to wonder, then, why it's important. The only reason I can think of is Sync.

However, there's still a lot I don't know about this subject so I'm loathe to say I know exactly what I'm talking about.

So, I guess the interleaving errors must be clock related too, if the software in a studio needs to run on word clock or SMPTE.

-Erik.

[e.lectronick]

I'm starting to think that the better route might be to find a way to force my cards to accept a commercial Word Clock signal -like from a MOTU Midi Timepiece AV unit. It could also feed the video software to prevent any software based sync issues.

Tiroth, I'm glad you mentioned the interleaving issue. I hadn't thought of the possibility of software clocking it wrong until then. But when I mentioned SMPTE running Pro Editors, I had an "I could've had a V8!" moment.

-Erik.

[stolbovoy]

Originally posted by e.lectronick
I'm starting to think that the better route might be to find a way to force my cards to accept a commercial Word Clock signal -like from a MOTU Midi Timepiece AV unit. It could also feed the video software to prevent any software based sync issues.

I think that instead of feeding WC signal into both video and audio capture boards, you can achieve the same results clocking audio card using PLL synchronized with video pixel clock (or PLL for pixel clock synchronized with audio). As alternative you can try to use different capture software like iuvcr (http://www.iulabs.com/iuvcr/index.shtml) wich implements different AV multiplexer