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POAVCaptureSession returning blank image on iPhone 3G only
primarykey
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3954952
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3989879
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CreationDate
2010-10-17T19:44:59.553
FavoriteCount
2
LastActivityDate
2017-05-29T16:25:06.993
LastEditDate
2017-05-29T16:25:06.993
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55075
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1
Score
3
ViewCount
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LastEditorDisplayName
text
Body
I'm using Apple's example code for AVCaptureSession, and the UIImage that gets created is completely blank. This only happens on the iPhone 3G, along with a unique error that shows up on console that says - <blockquote> Error: CGDataProviderCreateWithCopyOfData: vm_copy failed: status 2. </blockquote> I've researched the error online and found this <a href="https://stackoverflow.com/questions/3367849/cgbitmapcontextcreateimage-vm-copy-failed-iphone-sdk">StackOverflow answer</a>, and it gets rid of the error...but the image is still blank. Has anyone else experienced this and know how to fix it? Thanks in advance. My Code - <pre><code>CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); CVPixelBufferLockBaseAddress(imageBuffer, 0); void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer); size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); size_t width = CVPixelBufferGetWidth(imageBuffer); size_t height = CVPixelBufferGetHeight(imageBuffer); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); CGImageRef quartzImage = CGBitmapContextCreateImage(context); CVPixelBufferUnlockBaseAddress(imageBuffer,0); CGContextRelease(context); CGColorSpaceRelease(colorSpace); UIImage *image = [UIImage imageWithCGImage:quartzImage]; CGImageRelease(quartzImage); return image; </code></pre>
Tags
<iphone><ios4><avcapturesession>
Title
AVCaptureSession returning blank image on iPhone 3G only
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PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
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1. This table or related slice is empty.
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1. PTQuestion
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1. USkenorb
UserOwnerUserId
1. USRaphael Caixeta
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1. PO
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 POAVCaptureSession returning blank image on iPhone 3G only
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 USHarri Siirak
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 POAVCaptureSession returning blank image on iPhone 3G only
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 POAVCaptureSession returning blank image on iPhone 3G only
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