ImageFromSampleBuffer.m

// Create a UIImage from sample buffer data
- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer {
    // Get a CMSampleBuffer's Core Video image buffer for the media data
    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
    
    // Lock the base address of the pixel buffer
    CVPixelBufferLockBaseAddress(imageBuffer, 0);
	
    // Get the number of bytes per row for the pixel buffer
    void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);
	
    // Get the number of bytes per row for the pixel buffer
    size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
    
    // Get the pixel buffer width and height
    size_t width = CVPixelBufferGetWidth(imageBuffer);
    size_t height = CVPixelBufferGetHeight(imageBuffer);
    
    NSLog(@"w: %zu h: %zu bytesPerRow:%zu", width, height, bytesPerRow);
	
    // Create a device-dependent RGB color space
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
	
    // Create a bitmap graphics context with the sample buffer data
    CGContextRef context = CGBitmapContextCreate(baseAddress, 
    						 width, 
    						 height, 
    						 8, 
    						 bytesPerRow, 
    						 colorSpace, 
    						 kCGBitmapByteOrder32Little 
    						 | kCGImageAlphaPremultipliedFirst);
    // Create a Quartz image from the pixel data in the bitmap graphics context
    CGImageRef quartzImage = CGBitmapContextCreateImage(context);
    // Unlock the pixel buffer
    CVPixelBufferUnlockBaseAddress(imageBuffer,0);
	
    // Free up the context and color space
    CGContextRelease(context);
    CGColorSpaceRelease(colorSpace);
	
    // Create an image object from the Quartz image
    //UIImage *image = [UIImage imageWithCGImage:quartzImage];
	UIImage *image = [UIImage imageWithCGImage:quartzImage 
	 			             scale:1.0f 
	     			       orientation:UIImageOrientationRight];
	
    // Release the Quartz image
    CGImageRelease(quartzImage);
	
    return (image);
}

// CoreImage
- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer {
    // get pixelbuffer from samplebuffer
    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
    // get CIImage from pixelbuffer
    CIImage* ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer];
    // create CIContext
    CIContext* context = [CIContext contextWithOptions:@{kCIContextUseSoftwareRenderer : @(YES)}];
    // create CGImageRef from ciimage
    CGRect rect = CGRectMake(0, 0, CVPixelBufferGetWidth(pixelBuffer), CVPixelBufferGetHeight(pixelBuffer));
    CGImageRef videoImage = [context createCGImage:ciImage fromRect:rect];
    // create UIImage from CGImageRef
    UIImage* image = [UIImage imageWithCGImage:videoImage];
    // release CGImageRef
    CGImageRelease(videoImage);
    
    return image;
}