Error處理： android.media.MediaRecorder.start(Native Method) 報錯：start failed: -19

spydroid-android測試在android4.0系統上報錯

start failed: -19

並且也發現，在使用MediaRecorder進行視頻錄製，調用start()方法時報錯，發生 spydroid-android測試在android4.0系統上一樣的錯誤，具體錯誤以下：

 

01-06 14:04:07.790: V/MediaRecorder(13280): prepare
01-06 14:04:07.790: V/IMediaRecorder(13280): prepare
01-06 14:04:07.800: V/MediaRecorder(13280): start
01-06 14:04:07.800: V/IMediaRecorder(13280): start
01-06 14:04:08.190: E/MediaRecorder(13280): start failed: -19
01-06 14:04:08.190: W/System.err(13280): java.lang.RuntimeException: start failed.
01-06 14:04:08.200: W/System.err(13280):    at android.media.MediaRecorder.start(Native Method)
01-06 14:04:08.200: W/System.err(13280):    at com.yousee.videocapturedemo.VideoCapturePlus$2.onClick(VideoCapturePlus.java:145)
01-06 14:04:08.200: W/System.err(13280):    at android.view.View.performClick(View.java:3515)
01-06 14:04:08.200: W/System.err(13280):    at android.view.View$PerformClick.run(View.java:14144)
01-06 14:04:08.200: W/System.err(13280):    at android.os.Handler.handleCallback(Handler.java:605)
01-06 14:04:08.200: W/System.err(13280):    at android.os.Handler.dispatchMessage(Handler.java:92)
01-06 14:04:08.200: W/System.err(13280):    at android.os.Looper.loop(Looper.java:148)
01-06 14:04:08.200: W/System.err(13280):    at android.app.ActivityThread.main(ActivityThread.java:4503)
01-06 14:04:08.200: W/System.err(13280):    at java.lang.reflect.Method.invokeNative(Native Method)
01-06 14:04:08.200: W/System.err(13280):    at java.lang.reflect.Method.invoke(Method.java:511)
01-06 14:04:08.200: W/System.err(13280):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830)
01-06 14:04:08.200: W/System.err(13280):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-06 14:04:08.200: W/System.err(13280):    at dalvik.system.NativeStart.main(Native Method)

 

 

 

MediaRecorder 初始化和設置代碼以下：

 

 

   .....
       mMediaRecorder=new MediaRecorder();
       //設置視頻源
       mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
       //設置音頻源
       mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
       //設置文件輸出格式
       mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
       //設置視頻編碼方式
       mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
       //設置音頻編碼方式
       mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
       //設置視頻高和寬,注意文檔的說明:
       //Must be called after setVideoSource().
       //Call this after setOutFormat() but before prepare().
       //設置錄製的視頻幀率,注意文檔的說明:
       //Must be called after setVideoSource().
       //Call this after setOutFormat() but before prepare().
       mMediaRecorder.setVideoFrameRate(20);
       //設置預覽畫面
       mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
       //設置輸出路徑
       mMediaRecorder.setOutputFile
       (Environment.getExternalStorageDirectory()+File.separator+System.currentTimeMillis()+".mp4");
.....
mediaRecorder.prepare();
mediaRecorder.start();
.....

 

相同的程序在Android2.3平臺上正常運行，在Android4.0上報錯。

解決方法：

註釋掉設置視頻幀率的語句。//mMediaRecorder.setVideoFrameRate(mQuality.framerate);

 

將setVideoFrameRate去掉以後，若是還出現該錯誤，可將

mMediaRecorder.setVideoSize(videoWidth, videoHeight);也註釋掉

緣由：

      視頻的幀率和視頻大小是須要硬件支持的，若是設置的幀率和視頻大小,若是硬件不支持就會出現錯誤。

參考：

          http://stackoverflow.com/questions/11249642/mediarecorder-start-failed-19