从CMSampleBuffer中提取数据以创建深层副本

好吧，我想我终于明白了。我创建了一个辅助扩展程序来制作的完整副本

CVPixelBuffer

extension CVPixelBuffer {    func copy() -> CVPixelBuffer {        precondition(CFGetTypeID(self) == CVPixelBufferGetTypeID(), "copy() cannot be called on a non-CVPixelBuffer")        var _copy : CVPixelBuffer?        CVPixelBufferCreate( nil, CVPixelBufferGetWidth(self), CVPixelBufferGetHeight(self), CVPixelBufferGetPixelFormatType(self), CVBufferGetAttachments(self, kCVAttachmentMode_ShouldPropagate)?.takeUnretainedValue(), &_copy)        guard let copy = _copy else { fatalError() }        CVPixelBufferLockbaseAddress(self, kCVPixelBufferLock_ReadOnly)        CVPixelBufferLockbaseAddress(copy, 0)        for plane in 0..<CVPixelBufferGetPlaneCount(self) { let dest = CVPixelBufferGetbaseAddressOfPlane(copy, plane) let source = CVPixelBufferGetbaseAddressOfPlane(self, plane) let height = CVPixelBufferGetHeightOfPlane(self, plane) let bytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(self, plane) memcpy(dest, source, height * bytesPerRow)        }        CVPixelBufferUnlockbaseAddress(copy, 0)        CVPixelBufferUnlockbaseAddress(self, kCVPixelBufferLock_ReadOnly)        return copy    }}

现在您可以在您的

didOutputSampleBuffer

guard let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else { return }let copy = pixelBuffer.copy()toProcess.append(copy)

但是请注意，一个这样的pixelBuffer会占用大约3MB的内存（1080p），这意味着在100帧中您已经拥有了300MB的内存，这大约是iPhone所说的STAHP（并崩溃）的时间。

请注意，您实际上并不想复制，

CMSampleBuffer

CVPixelBuffer