Do you have an object registered to receive the
QTCaptureSessionRuntimeErrorNotification? If you receive such a
notification, its userInfo will contain an NSError for the
QTCaptureSessionErrorKey. That NSError's userInfo may also contain an
underlying NSError for the NSUnderlyingErrorKey. If you receive one of
these notifications after starting a capture session, you most likely
do not have enough bus bandwidth to capture from both devices
simultaneously, which will result in an IOKit error. If this is the
case, investigate capturing with the cameras plugged into two separate
buses, if they are available.
Good luck.
David Underwood
QuickTime Engineering
On Jun 6, 2008, at 7:03 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 :( )
_______________________________________________
Do not post admin requests to the list. They will be ignored.
QuickTime-API mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quicktime-api/email@hidden
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
QuickTime-API mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quicktime-api/email@hidden
