我设置maxDuration时为什么无法播放视频

Question

我制作了我的相机，在视频打开时录制。问题是，当我放入maxDuration（3秒）时，它会在3秒后停止录制，但无法播放视频。如何解决这个问题。当我删除recorder.setMaxDuration（3000）;退出应用程序和视频后，它会记录并停止录制，但是当我将maxDuration设置为3秒时，它就不会播放视频。

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Context;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.os.Environment;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

/**
 * Created by Admin on 3.10.2015.
 */
public class VideoCapture extends SurfaceView implements SurfaceHolder.Callback {

    private MediaRecorder recorder;
    private SurfaceHolder holder;
    public Context context;
    private Camera camera;
    public static String videoPath = Environment.getExternalStorageDirectory()
            .getPath() +"/YOUR_VIDEO.mp4";

    public VideoCapture(Context context) {
        super(context);
        this.context = context;
        init();
    }

    public VideoCapture(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public VideoCapture(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    @SuppressLint("NewApi")
    public void init() {
        try {
            recorder = new MediaRecorder();
            holder = getHolder();
            holder.addCallback(this);
            holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
            camera = getCameraInstance();
            if(android.os.Build.VERSION.SDK_INT > 7)
                camera.setDisplayOrientation(90);
            camera.unlock();
            recorder.setCamera(camera);
            recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
            recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            recorder.setMaxDuration(3000); 
            recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
            recorder.setOutputFile(videoPath);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
    }

    public void surfaceCreated(SurfaceHolder mHolder) {
        try {
            recorder.setPreviewDisplay(mHolder.getSurface());
            recorder.prepare();
            recorder.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void stopCapturingVideo() {
        try {
            recorder.stop();
            camera.lock();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @TargetApi(5)
    public void surfaceDestroyed(SurfaceHolder arg0) {
        if (recorder != null) {
            stopCapturingVideo();
            recorder.release();
            camera.lock();
            camera.release();
            recorder = null;
        }
    }

    private Camera getCameraInstance() {
        Camera c = null;
        try {
            c = Camera.open(); // attempt to get a Camera instance
        } catch (Exception e) {
            // Camera is not available (in use or does not exist)
        }
        return c;
    }
}