CVPixelBufferRef pixelBuffer = (CVPixelBufferRef)CMSampleBufferGetImageBuffer(sampleBuffer); CGImageRef cgImage = nil; VTCreateCGImageFromCVPixelBuffer(pixelBuffer, nil, &cgImage); UIImage *image = [[UIImage alloc] initWithCGImage:cgImage]; return image;
这个方法只能在iOS9以上执行,而且我还遇到一个问题,连续调用VTCreateCGImageFromCVPixelBuffer 15次后,会将AVCaptureSession的video连接给断开,非常神奇 - -!,以至于老是卡主我的预览。
CVPixelBufferRef pixelBuffer = (CVPixelBufferRef)CMSampleBufferGetImageBuffer(sampleBuffer); CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer]; CIContext *temporaryContext = [CIContext contextWithOptions:nil]; CGImageRef videoImage = [temporaryContext createCGImage:ciImage fromRect:CGRectMake(0, 0, CVPixelBufferGetWidth(pixelBuffer), CVPixelBufferGetHeight(pixelBuffer))]; UIImage *uiImage = [UIImage imageWithCGImage:videoImage]; CGImageRelease(videoImage); return uiImage;
目前用的就是这个。
这是第三方库SRRecorder中使用的方法,不过还是需要pixeltype为kCVPixelFormatType_32BGRA才行。
+ (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); // Get the pixel buffer width and height size_t width = CVPixelBufferGetWidth(imageBuffer); size_t height = CVPixelBufferGetHeight(imageBuffer); // Create a device-dependent RGB color space CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); // Create a bitmap graphics context with the sample buffer data CGContextRef context = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); // Create a Quartz image from the pixel data in the bitmap graphics context CGImageRef quartzImage = CGBitmapContextCreateImage(context); // Unlock the pixel buffer CVPixelBufferUnlockBaseAddress(imageBuffer,0); // Free up the context and color space CGContextRelease(context); CGColorSpaceRelease(colorSpace); // Create an image object from the Quartz image //UIImage *image = [UIImage imageWithCGImage:quartzImage]; UIImage *image = [UIImage imageWithCGImage:quartzImage scale:1.0f orientation:UIImageOrientationRight]; // Release the Quartz image CGImageRelease(quartzImage); return (image); }
谢谢你请我吃糖果