Thread-topic: vdig capture directly: VDGetImageDescription() problem
You must first create the imgHandle like this:
imgHandle = (ImageDescriptionHandle)NewHandle(0);
> ----------
> From: wshvic
> Sent: Thursday, September 7, 2006 11:57 PM
>
> Hi everyone
>
> If get vdig from SGGetVideoDigitizerComponent(), I can call VDGetImageDescription() to get image desc correctly.(NOTE: I must call SGPrepare() ,otherWise VDGetImageDescription() function won't work. I don't know why, this is QUESTION 1.).
> If I open vdig component directly, VDGetImageDescription() function won't work. My code is posted below:
> 1. open
> FindNextComponent(), OpenComponent();
> 2. configure vdig
> VDSetInput(vdigComponent,3); // selected input index is 3.
> VDSetInputStandard(vdigComponent,ntscIn);
> VDGetMaxSrcRect(vdigComponent,3,&maxSrcRect);
> VDSetDigitizerRect(vdigComponent,&maxSrcRect);
> VDSetTimeBase(vdigComponent,NewTimeBase());
> VDSetCompressionOnOff(vdigComponent,FALSE);
> VDGetImageDescription(vdigComponent,imgHandle); // PROBLEM!!!!
> // when the code runs here, it is hung up, GDB Debugger is lauched. It appears that VDGetImageDescription() function can not return. MY Question is that Is the order that I configure the vdig incorrect or I miss some necessary settings. This is QUESTION 2.
> BTW: I don't use seqGrab component and its video channel , I want to get video device list directly without SGGetChannelDeviceList() , is this possible? This is QUESTION3.
>
>
> any help would be appreciated! Thank you very much!
> email@hidden
>
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