Re: Deinterlacing QTCaptureDecompressedVideoOutput

FROM : Robert Douglas
DATE : Wed Mar 05 19:31:22 2008

I  ran in to a similar problem while analyzing incoming HDV images and 
I didn't find any simple solution.  My approach now is to create a 
second CVPixelBuffer with half the number of lines and copy every 
second line into that buffer.  Or two buffers to get better temporal 
resolution.  I haven't yet gotten around to writing the field images 
to a file so there may be issues with rectangular pixels, but output 
to a CIImage-based view works well.
I'd be interested in hearing of other solutions,
Rob


On 5-Mar-08, at 9:11 AM, Bram Loogman wrote:

> Hi,
>
> When I use QTCaptureDecompressedVideoOutput to capture a still image
> from a QTCaptureSession with a DV camera as input device, the image is
> interlaced. Which looks very ugly for moving objects. I basically use
> the code from the 'Creating a QTKit Stop or Still Motion Application'
> tutorial in the QTKit Capture Programming Guide to get an image buffer
> and than store it as a jpeg image.
> I looked at the camera settings but it's not possible to change the
> shutter speed or something like that. Is there a way to deinterlace
> the output from the QTCaptureSession?
>
> Thanks,
> Bram
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