Error处理： android.media.MediaRecorder.start(Native Method) 报错：start failed: -19 .

Error处理： android.media.MediaRecorder.start(Native Method) 报错：start failed: -19

spydroid-android测试在android4.0系统上报错

start failed: -19 而且也发现， 在使用MediaRecorder进行视频录制，调用start()方法时报错，发生spydroid-android测试在android4.0系统上同样的错误，具体错误如下：

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 初始化和设置代码如下：

..... mMediaRecorder=new MediaRecorder(); //设置视频源 mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); //设置音频源 mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); //设置文件输出格式 mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); //设置视频编码方式 mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); //设置音频编码方式 mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); //设置视频高和宽,注意文档的说明: //Must be called after setVideoSource(). //Call this after setOutFormat() but before prepare(). //设置录制的视频帧率,注意文档的说明: //Must be called after setVideoSource(). //Call this after setOutFormat() but before prepare(). mMediaRecorder.setVideoFrameRate(20); //设置预览画面 mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface()); //设置输出路径 mMediaRecorder.setOutputFile (Environment.getExternalStorageDirectory()+File.separator+System.currentTimeMillis()+".mp4"); ..... mediaRecorder.prepare(); mediaRecorder.start(); .....

相同的程序在Android2.3平台上正常运行，在Android4.0上报错。

解决方法：

注释掉设置视频帧率的语句。//mMediaRecorder.setVideoFrameRate(mQuality.framerate);

将setVideoFrameRate去掉之后，如果还出现该错误，可将

mMediaRecorder.setVideoSize(videoWidth, videoHeight);也注释掉

原因：

      视频的帧率和视频大小是需要硬件支持的，如果设置的帧率和视频大小,如果硬件不支持就会出现错误。

参考：

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