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

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本文转载自：http://blog.csdn.net/netwalk/article/details/17686993
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
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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：

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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：

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.....
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();
.....

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相同的程序在Android2.3平台上正常运行，在Android4.0上报错。
【Error处理（ android.media.MediaRecorder.start(Native Method) 报错：start failed: -19）】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