CMSampleBufferRef 转换为UIImage

步骤：CMSampleBufferRef --->CVImageBufferRef--->CGImageRef--->UIImage

(UIImage *)convertSampleBufferToImage:(CMSampleBufferRef)sampleBuffer { //制作 CVImageBufferRef CVImageBufferRef buffer; buffer = CMSampleBufferGetImageBuffer(sampleBuffer);

CVPixelBufferLockBaseAddress(buffer, 0);

//从 CVImageBufferRef 取得影像的细部信息 uint8_t *base; size_t width, height, bytesPerRow; base = CVPixelBufferGetBaseAddress(buffer); width = CVPixelBufferGetWidth(buffer); height = CVPixelBufferGetHeight(buffer); bytesPerRow = CVPixelBufferGetBytesPerRow(buffer);

//利用取得影像细部信息格式化 CGContextRef CGColorSpaceRef colorSpace; CGContextRef cgContext; colorSpace = CGColorSpaceCreateDeviceRGB(); cgContext = CGBitmapContextCreate(base, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); CGColorSpaceRelease(colorSpace);

//透过 CGImageRef 将 CGContextRef 转换成 UIImage CGImageRef cgImage; UIImage *image; cgImage = CGBitmapContextCreateImage(cgContext); image = [UIImage imageWithCGImage:cgImage]; CGImageRelease(cgImage); CGContextRelease(cgContext);

CVPixelBufferUnlockBaseAddress(buffer, 0);

return image; }