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我有一个应用程序捕获kCVPixelFormatType_420YpCbCr8BiPlanarFullRange格式的实时视频来处理Y通道.根据Apple的文档:

kCVPixelFormatType_420YpCbCr8BiPlanarFullRange双平面分量Y'CbCr 8位4:2:0,全范围(亮度= [0,255]色度= [1,255]).baseAddr指向big-endian CVPlanarPixelBufferInfo_YCbCrBiPlanar结构.

我想在UIViewController中展示一些这些帧,是否有任何API可以转换为kCVPixelFormatType_32BGRA格式？您能给出一些提示来调整Apple提供的这种方法吗？

// Create a UIImage from sample buffer data
- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer  {
    // Get a CMSampleBuffer's Core Video image buffer for the media data
    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
    // Lock the base address of the pixel buffer
    CVPixelBufferLockBaseAddress(imageBuffer, 0);

    // Get the number of bytes per row for the pixel buffer
    void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);

    // Get the number of bytes per row for the pixel buffer
    size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); …