How to turn a CVPixelBuffer into a UIImage?

Question

I\'m having some problems getting a UIIMage from a CVPixelBuffer. This is what I am trying:

CVPixelBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(imag         


        

Answer 1

Unless your image data is in some different format that requires swizzle or conversion - i would recommend no incrementing of anything... just smack the data into your context memory area with memcpy as in:

//not here... unsigned char *buffer = CVPixelBufferGetBaseAddress(pixelBuffer);

UIGraphicsBeginImageContext(CGSizeMake(w, h));

CGContextRef c = UIGraphicsGetCurrentContext();

void *ctxData = CGBitmapContextGetData(c);

// MUST READ-WRITE LOCK THE PIXEL BUFFER!!!!
CVPixelBufferLockBaseAddress(pixelBuffer, 0);
void *pxData = CVPixelBufferGetBaseAddress(pixelBuffer);
memcpy(ctxData, pxData, 4 * w * h);
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);

... and so on...