MediaRecorder 切换摄像头 录制出错

[qq_27226823]

public class MainActivity extends AppCompatActivity {

    private MediaRecorder mediaRecorder;
    private SurfaceView surfaceView;
    private SurfaceHolder surfaceHolder;
    private boolean isRecord = false;
    private boolean isCaremaBack = true;
    private Button startCameraBtn, changeCameraBtn;
    private Camera camera;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
    }

    private void initView() {
        startCameraBtn = (Button) findViewById(R.id.startBtn);
        changeCameraBtn = (Button) findViewById(R.id.changeBtn);
        startCameraBtn.setOnClickListener(listener);
        changeCameraBtn.setOnClickListener(listener);

        surfaceView = (SurfaceView) findViewById(R.id.surfaview);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(callback);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.startBtn:
                    if (!isRecord) {
                        if (mediaRecorder == null) {
                            mediaRecorder = new MediaRecorder();
                        }
                        if (camera == null) {
                            camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
                            camera.unlock();
                        }
                        mediaRecorder.setCamera(camera);
                        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
                        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
                        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                        mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);

                        CamcorderProfile camcorderProfile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
                        mediaRecorder.setVideoSize(480, 320);
                        mediaRecorder.setVideoFrameRate(camcorderProfile.videoFrameRate);//设置要捕获的视频帧速率
                        mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());

                        String path = getSDPath();
                        if (path != null) {
                            File dir = new File(path + "/recordtest");
                            if (!dir.exists()) {     //返回一个布尔值，指示是否可以在下面的文件系统中找到这个文件。
                                dir.mkdir();
                            }
                            path = dir + "/" + getDate() + ".mp4";
                            mediaRecorder.setOutputFile(path);
                            try {
                                mediaRecorder.prepare();//准备录音机开始捕获和编码数据。
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                        mediaRecorder.start();
                        isRecord = true;
                        startCameraBtn.setText("stop");
                    } else {
                        mediaRecorder.stop();
                        mediaRecorder.reset();
                        startCameraBtn.setText("start");
                        isRecord = false;
                    }
                    break;
                case R.id.changeBtn:
                    camera.stopPreview();
                    camera.release();
                    camera = null;
                    if (isCaremaBack) {
                        camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);
                        isCaremaBack = false;
                    } else {
                        camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
                        isCaremaBack=true;
                    }
                    try {
                        camera.setPreviewDisplay(surfaceHolder);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    camera.startPreview();
                    isCaremaBack = false;
                    break;
            }
        }
    };

    SurfaceHolder.Callback callback = new SurfaceHolder.Callback() {
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            surfaceHolder = holder;
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            surfaceHolder = holder;
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            surfaceView = null;
            surfaceHolder = null;
            if (mediaRecorder != null) {
                mediaRecorder.release();
                mediaRecorder = null;
            }
        }
    };

    public String getDate() {
        Calendar ca = Calendar.getInstance();
        int year = ca.get(Calendar.YEAR);           // 获取年份
        int month = ca.get(Calendar.MONTH);         // 获取月份
        int day = ca.get(Calendar.DATE);            // 获取日
        int minute = ca.get(Calendar.MINUTE);       // 分
        int hour = ca.get(Calendar.HOUR);           // 小时
        int second = ca.get(Calendar.SECOND);       // 秒

        String date = "" + year + (month + 1) + day + hour + minute + second;
        return date;
    }

    public String getSDPath() {
        File sdDir = null;
        boolean sdCardExist = Environment.getExternalStorageState()
                .equals(android.os.Environment.MEDIA_MOUNTED); // 判断sd卡是否存在
        if (sdCardExist) {
            sdDir = Environment.getExternalStorageDirectory();// 获取跟目录
            return sdDir.toString();
        }

        return null;
    }
    
}

请问大神为什么我点击切换摄像头的按钮（然后切换了摄像头） 录屏就不会再录视频（卡在了切换的那一帧），而音频是正常的，如果不切换摄像头就是一切正常的，请问是哪里出问题了

[Birds2018]

录制的时候 不能切换摄像头，先要停止录制 然后关闭原来的摄像头， 然后重新打开新的摄像头 启动MediaRecord 都要重新设置。

[qq_27226823]

引用 1 楼 birdsaction 的回复:

录制的时候 不能切换摄像头，先要停止录制 然后关闭原来的摄像头， 然后重新打开新的摄像头 启动MediaRecord 都要重新设置。

谢谢你 我试试