ios - Swift で CMSampleBuffer のコピーを作成すると、OSStatus -12743 (無効なメディア形式) が返されます

Question

CMSampleBufferの出力を保存するために のディープ クローンを実行しようとしていAVCaptureSessionます。kCMSampleBufferError_InvalidMediaFormat (OSStatus -12743)関数を実行するとエラーが発生しますCMSampleBufferCreateForImageBuffer。CVImageBufferとCMSampleBuffer形式の説明がどのように一致していないのかわかりません。私がどこで間違ったのか知っている人はいますか？彼女は私のテストコードです。

func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) {

    let allocator: CFAllocator = CFAllocatorGetDefault().takeRetainedValue()

    func cloneImageBuffer(imageBuffer: CVImageBuffer!) -> CVImageBuffer? {
        CVPixelBufferLockBaseAddress(imageBuffer, 0)
        let bytesPerRow: size_t = CVPixelBufferGetBytesPerRow(imageBuffer)
        let width: size_t = CVPixelBufferGetWidth(imageBuffer)
        let height: size_t = CVPixelBufferGetHeight(imageBuffer)
        let baseAddress = CVPixelBufferGetBaseAddress(imageBuffer)
        let pixelFormatType = CVPixelBufferGetPixelFormatType(imageBuffer)

        let data = NSMutableData(bytes: baseAddress, length: bytesPerRow * height)
        CVPixelBufferUnlockBaseAddress(imageBuffer, 0)

        var clonedImageBuffer: CVPixelBuffer?
        let refCon = NSMutableData()

        if CVPixelBufferCreateWithBytes(allocator, width, height, pixelFormatType, data.mutableBytes, bytesPerRow, nil, refCon.mutableBytes, nil, &clonedImageBuffer) == noErr {
            return clonedImageBuffer
        } else {
            return nil
        }
    }

    if let oldImageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) {
        if let newImageBuffer = cloneImageBuffer(oldImageBuffer) {
            if let formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer) {
                let dataIsReady = CMSampleBufferDataIsReady(sampleBuffer)
                let refCon = NSMutableData()
                var timingInfo: CMSampleTimingInfo = kCMTimingInfoInvalid
                let timingInfoSuccess = CMSampleBufferGetSampleTimingInfo(sampleBuffer, 0, &timingInfo)
                if timingInfoSuccess == noErr {
                    var newSampleBuffer: CMSampleBuffer?
                    let success = CMSampleBufferCreateForImageBuffer(allocator, newImageBuffer, dataIsReady, nil, refCon.mutableBytes, formatDescription, &timingInfo, &newSampleBuffer)
                    if success == noErr {
                        bufferArray.append(newSampleBuffer!)
                    } else {
                        NSLog("Failed to create new image buffer. Error: \(success)")
                    }
                } else {
                    NSLog("Failed to get timing info. Error: \(timingInfoSuccess)")
                }
            }
        }
    }
}