How can I obtain raw data from a CVImageBuffer object

问题

I'm trying to use cocoa to grab images from a webcam. I'm able to get the image in RGBA format using the QTKit and the didOutputVideoFrame delegate call, and converting the CVImageBuffer to a CIImage and then to a NSBitmapImageRep.

I know my camera grabs natively in YUV, what I want is to get the YUV data directly from the CVImageBuffer, and proccess the YUV frame before displaying it.

My question is: How can I get the YUV data from the CVImageBuffer?

thanks.

回答1:

You might be able to create a CIImage from the buffer using +[CIImage imageWithCVBuffer:] and then render that CIImage into a CGBitmapContext of the desired pixel format.

Note, I have not tested this solution.

回答2:

I asked what I thought was a different question, but it turned out to have the same answer as this one: raw data from CVImageBuffer without rendering?

来源：https://stackoverflow.com/questions/2837383/how-can-i-obtain-raw-data-from-a-cvimagebuffer-object