時間限制視頻錄製：在相機應用中顯示最長時間

Question

我正在研究需要視頻捕獲的應用程序。

一切工作正常，如：

1. 打開攝像頭進行視頻錄製。
2. 錄像正在錄製20秒。
3. 視頻預覽和一切。

問題：

的問題是，當我開始然後錄像攝像頭應用程序停止20秒後的視頻錄製（這是正確的），但用戶得到通知僅20秒後說：「最大的再編碼時間達到」。

和同時記錄它顯示：

（重新編碼時間）/（可記錄的總時間）。

我想要什麼：

我想告訴用戶（剩餘時間）/（20秒）。

這裏是我的代碼：

public class MainActivity extends AppCompatActivity { 

    private static final int REQUEST_VIDEO_CAPTURE = 1; 
    private static final int MAXIMUM_VIDEO_RECORDING_LIMIT = 20; 
    private static final int VIDEO_RECORDING_QUALITY = 0; 

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

     dispatchTakeVideoIntent(); 
    } 

    private void dispatchTakeVideoIntent() { 

     Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); 
     takeVideoIntent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, MAXIMUM_VIDEO_RECORDING_LIMIT); 
     takeVideoIntent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, VIDEO_RECORDING_QUALITY); 

     if (takeVideoIntent.resolveActivity(getPackageManager()) != null) { 
      startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE); 
     } 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

     if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) { 

      Uri file = data.getData(); 

     } 
    } 
} 

如何可以實現的，請大家幫忙。

Answer 1

下面是一個使用MediaRecorder一個簡單的視頻錄製例如：

在此您可以定義視頻錄製最大時間限制，文件大小爲好。

public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback { 
    MediaRecorder recorder; 
    SurfaceHolder holder; 
    boolean recording = false; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
       WindowManager.LayoutParams.FLAG_FULLSCREEN); 
     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); 

     recorder = new MediaRecorder(); 
     initRecorder(); 
     setContentView(R.layout.main); 

     SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView); 
     holder = cameraView.getHolder(); 
     holder.addCallback(this); 
     holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 

     cameraView.setClickable(true); 
     cameraView.setOnClickListener(this); 
    } 

    private void initRecorder() { 
     recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); 
     recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); 

     CamcorderProfile cpHigh = CamcorderProfile 
       .get(CamcorderProfile.QUALITY_HIGH); 
     recorder.setProfile(cpHigh); 
     recorder.setOutputFile("/sdcard/videocapture_example.mp4"); 
     recorder.setMaxDuration(50000); // 50 seconds 
     recorder.setMaxFileSize(5000000); // Approximately 5 megabytes 
    } 

    private void prepareRecorder() { 
     recorder.setPreviewDisplay(holder.getSurface()); 

     try { 
      recorder.prepare(); 
     } catch (IllegalStateException e) { 
      e.printStackTrace(); 
      finish(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
      finish(); 
     } 
    } 

    public void onClick(View v) { 
     if (recording) { 
      recorder.stop(); 
      recording = false; 

      // Let's initRecorder so we can record again 
      initRecorder(); 
      prepareRecorder(); 
     } else { 
      recording = true; 
      recorder.start(); 
     } 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     prepareRecorder(); 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int width, 
      int height) { 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
     if (recording) { 
      recorder.stop(); 
      recording = false; 
     } 
     recorder.release(); 
     finish(); 
    } 
}