录像时调用MediaRecorder的start()时发生start failed: -19错误

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private void start() {         if (isRecording)         {             // 停止录像并释放myFrontFacingCamera             myVideoRecorder.stop();             releaseVideoRecorder();             /*myFrontFacingCamera.lock();*/ // 从Android4.0开始，这个方法由系统自动调用                           // TODO：通知用户录像已停止，设置停止按钮为不可用                           isRecording = false;         } else {             // 初始化myFrontFacingCamera             if (prepareVideoRecorder()) {                 // myFrontFacingCamera已可用并解锁，VideoRecorder已就绪                 // 现在可以开始录像                 /*myFrontFacingCamera.startPreview();*/                 myVideoRecorder.start();                                   // TODO:通知用户录像已开始，设置开始按钮为不可用                                   isRecording = true;             } else {                 // 准备未能完成，释放myFrontFacingCamera                 releaseVideoRecorder();                 // TODO:通知用户             }         }     }   private boolean prepareVideoRecorder()     {         /*myFrontFacingCamera = getFrontFacingCamera();*/ // 在onCreate()中已经创建了myFrontFacingCamera对象         myVideoRecorder = new MediaRecorder();                   // 解锁并将摄像头指向myVideoRecorder         /*myFrontFacingCamera.unlock();*/ //在Android4.0之后这个方法由系统自动调用         myVideoRecorder.setCamera(myFrontFacingCamera);                   // TODO:指定源，如果声音源不行，就用麦克作为声音源         myVideoRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);         myVideoRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);                   // 指定CamcorderProfile（需要API Level 8以上版本），这里的Profile包括了输出格式，声音编码类型和视频编码类型         myVideoRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_LOW));                   myVideoRecorder.setVideoSize(100, 100);                   // 指定输出文件         myVideoRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());                   // 指定预览输出         myVideoRecorder.setPreviewDisplay(myVideoPreview.getHolder().getSurface());                   // 根据以上配置准备myVideoRecorder         try {             myVideoRecorder.prepare();         } catch (IllegalStateException e) {             Log.d("VideoActivity:prepareVideoRecorder", "准备myVideoRecorder时发生IllegalStateException错误" + " " + e.getMessage());             releaseVideoRecorder();             return false;         } catch (IOException e) {             Log.d("VideoActivity:prepareVideoRecorder", "准备myVideoRecorder时发生IOException错误" + " " + e.getMessage());             releaseVideoRecorder();             return false;         }                   return true;                                   }

解决方案：

将  myVideoRecorder.setVideoSize(100, 100); 这句话注释掉就行了