如何使用MediaRecorder在Android上捕获视频? [英] How to use MediaRecorder to capture video on Android?

问题描述

我想使用MediaRecorder创建一个简短的视频剪辑，但是我不知道如何使用它.

I would like to create a short video clip using the MediaRecorder, but I don't know how to use it.

在清单文件中，我在application-end-tag之前添加了以下权限:

In my manifest file I added these permissions before the application-end-tag:

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.RECORD_VIDEO" />
</application>

当用户按下按钮时，我用以下代码创建MediaRecorder:

And I create a MediaRecorder with this code when the user press a button:

    private void startRecording() {
    mRecorder = new MediaRecorder();
    mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
    mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mRecorder.setOutputFile("myvideo.mpeg4");

    try {
        mRecorder.prepare();
    } catch (IOException e) {

    }
    mRecorder.start();
}

但是，当我运行该代码时，出现强制关闭-应用程序意外停止.请重试"消息.我应该如何使用MediaRecorder以及如何调试应用程序以查看导致异常的原因?我是否需要向清单文件添加任何其他用户权限?

But when I run that code I get a "Force close - The application has stopped unexpectedly. Please try again" message. How should I use MediaRecorder and how can I debug my application to see what causes the exception? Do I need to add any other user permissions to my manifest file?

推荐答案

您必须设置预览显示，才能使用媒体记录器进行视频记录. 请参见 MediaRecorder教程

You MUST set a preview display in order to use the media recorder for video recording. See MediaRecorder tutorial

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