Error handling: Android.media.MediaRecorder.start (Native Method) Error: Start failed:-19

spydroid-android test Reporting errors in android4.0 system [HTML]View PlainCopy

1. Start failed:-19

And also found that in the use of Mediarecorder for video recording, call Start () method times wrong, the occurrence of spydroid-android test on the android4.0 system the same error, the specific error is as follows:

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2. 01-06 14:04:07.790:v/mediarecorder (13280): Prepare
4. 01-06 14:04:07.790:v/imediarecorder (13280): Prepare
6. 01-06 14:04:07.800:v/mediarecorder (13280): Start
8. 01-06 14:04:07.800:v/imediarecorder (13280): Start
10. 01-06 14:04:08.190:e/mediarecorder (13280): Start failed:-19
12. 01-06 14:04:08.190:w/system.err (13280): Java.lang.RuntimeException:start failed.
14. 01-06 14:04:08.200:w/system.err (13280): at Android.media.MediaRecorder.start (Native Method)
16. 01-06 14:04:08.200:w/system.err (13280): at Com.yousee.videocapturedemo.videocaptureplus$2.onclick ( videocaptureplus.java:145)
18. 01-06 14:04:08.200:w/system.err (13280): at Android.view.View.performClick (view.java:3515)
20. 01-06 14:04:08.200:w/system.err (13280): at Android.view.view$performclick.run (view.java:14144)
22. 01-06 14:04:08.200:w/system.err (13280): at Android.os.Handler.handleCallback (handler.java:605)
24. 01-06 14:04:08.200:w/system.err (13280): at Android.os.Handler.dispatchMessage (handler.java:92)
26. 01-06 14:04:08.200:w/system.err (13280): at Android.os.Looper.loop (looper.java:148)
28. 01-06 14:04:08.200:w/system.err (13280): at Android.app.ActivityThread.main (activitythread.java:4503)
30. 01-06 14:04:08.200:w/system.err (13280): at Java.lang.reflect.Method.invokeNative (Native Method)
32. 01-06 14:04:08.200:w/system.err (13280): at Java.lang.reflect.Method.invoke (method.java:511)
34. 01-06 14:04:08.200:w/system.err (13280): at Com.android.internal.os.zygoteinit$methodandargscaller.run ( zygoteinit.java:830)
36. 01-06 14:04:08.200:w/system.err (13280): at Com.android.internal.os.ZygoteInit.main (zygoteinit.java:597)
38. 01-06 14:04:08.200:w/system.err (13280): at Dalvik.system.NativeStart.main (Native Method)

The Mediarecorder initialization and setup code is as follows:

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2. .....
4. mmediarecorder=new Mediarecorder ();
6. //Set Video source
8. Mmediarecorder.setvideosource (MediaRecorder.VideoSource.DEFAULT);
10. //Set audio source
12. Mmediarecorder.setaudiosource (MediaRecorder.AudioSource.DEFAULT);
14. //Set file output format
16. Mmediarecorder.setoutputformat (MediaRecorder.OutputFormat.THREE_GPP);
18. //Set video encoding mode
20. Mmediarecorder.setvideoencoder (MediaRecorder.VideoEncoder.H264);
22. //Set audio encoding mode
24. Mmediarecorder.setaudioencoder (MediaRecorder.AudioEncoder.DEFAULT);
26. //Set the video height and width, note the description of the document:
28. //must is called after Setvideosource ().
30. //call this after Setoutformat () but before prepare ().
32. //Set the recorded video frame rate, note the description of the document:
34. //must is called after Setvideosource ().
36. //call this after Setoutformat () but before prepare ().
38. Mmediarecorder.setvideoframerate (20);
40. //Set preview screen
42. Mmediarecorder.setpreviewdisplay (Msurfaceholder.getsurface ());
44. //Set Output path
46. Mmediarecorder.setoutputfile
48. (Environment.getexternalstoragedirectory () +file.separator+system.currenttimemillis () +". mp4");
50. .....
52. Mediarecorder.prepare ();
54. Mediarecorder.start ();
56. .....

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The same program runs normally on the Android2.3 platform, and the error is reported in Android4.0.

Workaround:

Comment out the statement that sets the video frame rate. Mmediarecorder.setvideoframerate (mquality.framerate);

After removing the setvideoframerate, if the error still occurs, you can

Mmediarecorder.setvideosize (Videowidth, Videoheight), also commented out

Reason:

The video's frame rate and video size are hardware-supported, and if the frame rate and video size are set, an error occurs if the hardware is not supported.

Reference:

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

Error handling: Android.media.MediaRecorder.start (Native Method) Error: Start failed:-19