I want to add PreviewCallback

[y3000y7]

hello saki, thanks for your passion.
I have a question.
I want to add PreviewCallback in CameraGLView.

The following is what I have tried :

in CameraGLView.java

Callback is working well.
But if i try to record, happened crash with this message.

07-21 13:02:23.193 19753-19764/com.serenegiant.mediaaudiotest E/AndroidRuntime﹕ FATAL EXCEPTION: FinalizerWatchdogDaemon
Process: com.serenegiant.mediaaudiotest, PID: 19753
java.util.concurrent.TimeoutException: android.media.MediaMuxer.finalize() timed out after 10 seconds
at android.media.MediaMuxer.nativeRelease(Native Method)
at android.media.MediaMuxer.finalize(MediaMuxer.java:240)
at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:187)
at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:170)
at java.lang.Thread.run(Thread.java:841)

can you help me?
sorry for my bad english, thank you.