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Re: Dual HV20 capture




On Jun 6, 2008, at 8:24 AM, mike woodworth wrote:


I think I know what your problem is, try this... run the two cams in vcr mode and see if they both show up, or run them on separate buses. Let me know if that solves the problem.

The "run them on separate buses" part might be a little harder than it seems. Some people might not be aware that Macs with multiple firewire ports share one firewire bus (yes, even the 800 / 400 ports -- one bus). So to get a second firewire bus, you'd need to use a pci firewire add-in card (or equivalent Express card add-in).


-Brad Ford
QuickTime Engineering



mike
--
Mike Woodworth
email@hidden


On Jun 6, 2008, at 10:03 AM, Christopher Wright wrote:

Those tests were fine in my case

So it's HV20-specific?

There's a little trick that you could use: Quartz Composer can use the HV20 properly, so probably you could create and use a Quartz Composition as a fast workaround. I couldn't do it because the kind of software I'm involved with, but can you?

Irony: kineme.net specializes in QC Plugins ;) (the project I'm working on is in fact getting 2 HV20's to work simultaneously in QC). It can capture from one, or the other, but not both at the same time. the built-in video input patch only lets you select one (a Cocoa/AppKit bug), and our revised patch (unreleased) allows you to select both, but when both are activated one camera never gets its capture callback called. I wanted to make sure I wasn't making some silly mistake to cause this, but it appears now that it's a QTKit issue :/


Another stupid thing is that you need Final Cut installed to use HDV on your system... I'm telling you just to be sure because you told you didn't test in DV mode.

Not a problem, I've got FC (but no HV20 on-site :( )

Thanks again :)

--
[ christopher wright ]
email@hidden
http://kineme.net/

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References: 
 >Dual HV20 capture (From: Christopher Wright <email@hidden>)
 >Re: Dual HV20 capture (From: "Javier Hernanz Zajara" <email@hidden>)
 >Re: Dual HV20 capture (From: Christopher Wright <email@hidden>)
 >Re: Dual HV20 capture (From: Javier Hernanz Zájara <email@hidden>)
 >Re: Dual HV20 capture (From: Christopher Wright <email@hidden>)
 >Re: Dual HV20 capture (From: mike woodworth <email@hidden>)



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