Question

我正在尝试从this SO answer实施解决方案，以便将视频录制到套接字（然后从播放器端的套接字读取它，最终目标是实时播放视频）

但是当试图调用madiarecorder的start（）时会出现异常：start failed：-1010

API说明了这个常数：

public static final int MEDIA_ERROR_UNSUPPORTED

在API级别17中添加了比特流符合相关编码   标准或文件规范，但媒体框架不支持   特征

但我猜测如果人们检查这个答案是否有效，就会以某种方式支持 - 所以请

指着我，我的错是什么？

这是我正在使用的代码：

public class MainActivity extends Activity {

    private Camera mCamera;
    private MediaRecorder mMediaRecorder;
    private Socket socket;
    private Preview mPreView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        setContentView(R.layout.activity_main);
        try {

            socket = new Socket("10.0.0.4",8080);
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        // this is your network socket
        ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(socket);
        mPreView=new Preview(this);
        mCamera = getCameraInstance();
        mMediaRecorder = new MediaRecorder();
        mCamera.lock();
        mCamera.unlock();
        mMediaRecorder.setCamera(mCamera);
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        // this is the unofficially supported MPEG2TS format, suitable for
        // streaming (Android 3.0+)
        mMediaRecorder.setOutputFormat(8);
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
        mMediaRecorder.setOutputFile(pfd.getFileDescriptor());
    //  mMediaRecorder.setPreviewDisplay(null);
        try {
            mMediaRecorder.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        mMediaRecorder.start();
    }

    /** A safe way to get an instance of the Camera object. */
    public static 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; // returns null if camera is unavailable
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    class Preview extends ViewGroup implements SurfaceHolder.Callback
    {
SurfaceView mSurface;
SurfaceHolder mHolder;
        public Preview(Context context) {
            super(context);
            // TODO Auto-generated constructor stub
            mSurface=new SurfaceView(context);
            addView(mSurface);
            mHolder=mSurface.getHolder();
        }
        @Override
        public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2,
                int arg3) {
            // TODO Auto-generated method stub

        }
        @Override
        public void surfaceCreated(SurfaceHolder arg0) {
            // TODO Auto-generated method stub

        }
        @Override
        public void surfaceDestroyed(SurfaceHolder arg0) {
            // TODO Auto-generated method stub

        }
        @Override
        protected void onLayout(boolean arg0, int arg1, int arg2, int arg3,
                int arg4) {
            // TODO Auto-generated method stub

        }

    }

}

为什么媒体录音机不支持它？我该如何解决？

谢谢你抽出时间。

Answer 1

我找到了解决方案：

我替换了这一行：

mMediaRecorder.setOutputFormat(8);

用这个：

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

Answer 2

如果MediaRecorder启动失败，请务必检查介质记录器的设置并确保它们完全可用于您的硬件，因此我会检查以下内容：

mMediaRecorder.setVideoSource();
mMediaRecorder.setOutputFormat();
mMediaRecorder.setVideoEncoder();

等。

如果其中任何一个不正确或不可用于硬件，那么这就是MediaRecorder会让您知道的方式

媒体录制器启动失败：MEDIA_ERROR_UNSUPPORTED（启动失败：-1010），同时尝试将视频录制到套接字

2 个答案: