Re: Dual HV20 capture

• Subject: Re: Dual HV20 capture
• From: Christopher Wright <email@hidden>
• Date: Sat, 7 Jun 2008 00:53:16 -0400
• Delivered-to: email@hidden
• Delivered-to: email@hidden
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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.

7/06/08 12:44:41 PM DualHV20App[264] QTCaptureSessionError:
NSConcreteNotification 0x51f820 {name =
QTCaptureSessionRuntimeErrorNotification; object = <QTCaptureSession:
0x17c27f60>; userInfo = {
   QTCaptureSessionErrorKey = Error Domain=QTKitErrorDomain Code=-1
UserInfo=0x17ce8870 "Operation could not be completed.";
}}
7/06/08 12:44:41 PM DualHV20App[264] QTCAptureSessionError userInfo: {
   QTCaptureSessionErrorKey = Error Domain=QTKitErrorDomain Code=-1
UserInfo=0x17ce8870 "Operation could not be completed.";
}
7/06/08 12:44:41 PM DualHV20App[264] QTCaptureSessionError:
NSConcreteNotification 0x51f820 {name =
QTCaptureSessionRuntimeErrorNotification; object = <QTCaptureSession:
0x17c27f60>; userInfo = {
   QTCaptureSessionErrorKey = Error Domain=QTKitErrorDomain Code=-1
UserInfo=0x17ce8870 "Operation could not be completed.";
}}
7/06/08 12:44:41 PM DualHV20App[264] QTCAptureSessionError userInfo: {
   QTCaptureSessionErrorKey = Error Domain=QTKitErrorDomain Code=-1
UserInfo=0x17ce8870 "Operation could not be completed.";
}
7/06/08 12:44:48 PM DualHV20App[264] QTVideoInput open device
error: Error Domain=QTKitErrorDomain Code=1301 UserInfo=0x18198240
"The device "HV20" could not be opened because it is in use by another
application."

(Sorry if that's a bit hard to read)

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

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