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POCGBitmapContextCreateImage - vm_copy failed - iPhone SDK
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copied!<p>I am having an issue using CGBitmapContextCreateImage in my iPhone app.</p> <p>I am using AV Foundation Framework to grab camera frames using this method:</p> <pre><code>- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); CVPixelBufferLockBaseAddress(imageBuffer,0); uint8_t *baseAddress = (uint8_t *)CVPixelBufferGetBaseAddress(imageBuffer); size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); size_t width = CVPixelBufferGetWidth(imageBuffer); size_t height = CVPixelBufferGetHeight(imageBuffer); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef newContext = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); CGImageRef newImage = CGBitmapContextCreateImage(newContext); CVPixelBufferUnlockBaseAddress(imageBuffer,0); CGContextRelease(newContext); CGColorSpaceRelease(colorSpace); UIImage *image= [UIImage imageWithCGImage:newImage scale:1.0 orientation:UIImageOrientationRight]; self.imageView.image = image; CGImageRelease(newImage); } </code></pre> <p>However, I am seeing an error in the debug console as its runs:</p> <pre><code><Error>: CGDataProviderCreateWithCopyOfData: vm_copy failed: status 2. </code></pre> <p>Has anyone ever seen this? By commenting out lines I have narrowed the problem line out to:</p> <pre><code>CGImageRef newImage = CGBitmapContextCreateImage(newContext); </code></pre> <p>but I am not sure how to get rid of it. Functionally, it works great. So clearly, the CGImage is being created, but I need to know what is causing the error so it doesn't affect other parts.</p> <p>Many thanks. Any help/advice would be great! Brett</p>

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