iOS AVCaptureSession-如何获取/设置每秒记录的帧数?

本文介绍了iOS AVCaptureSession-如何获取/设置每秒记录的帧数?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我是AVCaptureSession的新手，希望更好地了解如何使用它.因此，我设法将视频流捕获为单独的CIImages，并将其转换为UIImages.现在，我希望能够捕获每秒的帧数，并且最好能够进行设置.

I'm new to AVCaptureSession and wish to better understand how to work with it.So I managed capturing the video stream as separated CIImages and convert them to UIImages.Now I wish to be able to get the number of Frames Per Second captured and preferably to be able to set it.

有什么想法吗?

推荐答案

您可以使用AVCaptureConnection的videoMinFrameDuration访问器来设置值.

You could use AVCaptureConnection's videoMinFrameDuration accessor to set the value.

请参见 AVCaptureConnection文档

考虑output为AVCaptureVideoDataOutput对象.

AVCaptureConnection *conn = [output connectionWithMediaType:AVMediaTypeVideo];

if (conn.isVideoMinFrameDurationSupported)
    conn.videoMinFrameDuration = CMTimeMake(1, CAPTURE_FRAMES_PER_SECOND);
if (conn.isVideoMaxFrameDurationSupported)
    conn.videoMaxFrameDuration = CMTimeMake(1, CAPTURE_FRAMES_PER_SECOND);

更多信息，请参见此 SO问题

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