我正在尝试将图像数组转换为视频文件。在这个过程中,我必须从选定的图像填充像素缓冲区。以下是代码段:
CVPixelBufferLockBaseAddress(pixelBuffer, 0)
let pixelData = CVPixelBufferGetBaseAddress(pixelBuffer)
let bitmapInfo:CGBitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.PremultipliedFirst.rawValue)
let rgbColorSpace = CGColorSpaceCreateDeviceRGB()
print("\npixel buffer width: \(CVPixelBufferGetWidth(pixelBuffer))\n")
print("\nbytes per row: \(CVPixelBufferGetBytesPerRow(pixelBuffer))\n")
let context = CGBitmapContextCreate(
pixelData,
Int(image.size.width),
Int(image.size.height),
CGImageGetBitsPerComponent(image.CGImage),
CVPixelBufferGetBytesPerRow(pixelBuffer),
rgbColorSpace,
bitmapInfo.rawValue
)
CGContextDrawImage(context, CGRectMake(0, 0, image.size.width, image.size.height), image.CGImage)
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0)
执行这些行后,我在xcode中收到以下消息: CGBitmapContextCreate:无效数据字节/行:对于8个整数位/组件,3个组件至少应为13056,kCGImageAlphaPremultipliedFirst.CGContextDrawImage:无效的上下文0x0。 调试后,我得到以下值:
CVPixelBufferGetWidth(pixelBuffer) // value 480
CVPixelBufferGetBytesPerRow(pixelBuffer) // value 1920
我该怎么做才能获得有效的数据字节/行?控制台日志中指定了哪些 3个组件?我在stackoverflow中看到了类似的问题,但在我的情况下没有任何帮助。