Question

大家好我想从我的相机中提取帧，我正在使用AVCaptureVideoDataOutput，这是我的设置，我尝试将pixelformatTyoe设置为kCVPixelFormatType_24BGR

    AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
[videoDataOutput setVideoSettings:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_24BGR], (id)kCVPixelBufferPixelFormatTypeKey, nil]];
[videoDataOutput setAlwaysDiscardsLateVideoFrames:YES];
[videoDataOutput setSampleBufferDelegate:self queue:sessionQueue];

但是，当我运行代码时，我收到以下错误。

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVCaptureVideoDataOutput setVideoSettings:] - 24BG (842285639) is not a supported pixel format type.  See AVCaptureOutput.h for a list of supported formats.  Available pixel format types on this platform are (
420v,
420f,
BGRA

）。“

这是否意味着我只能使用kCVPixelFormatType_32BGRA？对我来说，我必须创建一个alpha通道。

任何建议将不胜感激。提前谢谢！

Answer 1

您可以从 AVCaptureVideoDataOutput

检查 availableVideoCVPixelFormatTypes

availableVideoCVPixelFormatTypes
Indicates the supported video pixel formats that can be specified in videoSettings

Please, go through apple documentation

不支持的像素格式类型xcode

1 个答案: