(cc'ing opencvlibrary-devel)
If you checked sources out recently, this may be related to the issues
that Vadim is now dealing with. (see thread from earlier today)
Xavier
On Tue, Apr 29, 2008 at 1:09 PM, Tim Hutt <
tdhutt@...> wrote:
>
>
>
>
>
>
> Hi, I had a couple of programs that *were* working perfectly using VFW to
> capture video on windows. However they've suddenly stopped working (as have
> the example programs) and I didn't even change anything! It is very weird.
>
> Now cvQueryFrame() always returns NULL. I've traced the execution into
> static IplImage* icvRetrieveFrameCAM_VFW( CvCaptureCAM_VFW* capture ), and
> everything seems fine until it gets to:
>
> if( vfmt.bmiHeader.biCompression != BI_RGB ||
>
> vfmt.bmiHeader.biBitCount != 24 )
>
> At this point, vfmt.bmiHeader.biCompression is actually equal to 0x47504a4d
> (MJPG).
>
> Subsequently this line returns NULL:
>
> capture->hic = ICOpen( MAKEFOURCC('V','I','D','C'),
>
> vfmt0.biCompression, ICMODE_DECOMPRESS );
>
> And it's all downhill from there. It worked before! Grr! Anyone have any
> ideas?
>
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