的Android MediaRecorder準備失敗-17

Question

我想，當我得到
準備沒能捕捉視頻和採用Android MediaRecorder。但它編碼：

這裏是我的代碼：

mediaRecorder = new MediaRecorder(); 
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 
mediaRecorder.setOutputFile("/sdcard/test.mp4"); 
mediaRecorder.setVideoFrameRate(20); 
mediaRecorder.setVideoSize(176, 144); 
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); 
mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface()); 
mediaRecorder.prepare(); 

當我將VideoEncoder設置爲H263並將Outputformat設置爲THREE_GPP時，我沒有得到此例外。

這是完整的堆棧跟蹤。

E/mm-camera 7x-vfe( 68): Received VFE start ACK!!! This is a user preview start. 

D/QualcommCameraHardware( 68): startPreview X 
E/AuthorDriver( 68): Command 13 completed with error -17 
E/MediaRecorder(6406): prepare failed: -17 
W/System.err(6406): java.io.IOException: prepare failed. 
W/System.err(6406): at android.media.MediaRecorder._prepare(Native Method) 
W/System.err(6406): at android.media.MediaRecorder.prepare(MediaRecorder.java:509) 
W/System.err(6406): at org.video.VideoStreamSender.prepare(VideoStreamSender.java:50) 
W/System.err(6406): at org.video.VideoPreview.surfaceCreated(VideoPreview.java:50) 
W/System.err(6406): at android.view.SurfaceView.updateWindow(SurfaceView.java:540) 
W/System.err(6406): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:339) 
W/System.err(6406): at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
W/System.err(6406): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
W/System.err(6406): at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
W/System.err(6406): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
W/System.err(6406): at android.view.View.draw(View.java:6742) 
W/System.err(6406): at android.widget.FrameLayout.draw(FrameLayout.java:352) 
W/System.err(6406): at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
W/System.err(6406): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
W/System.err(6406): at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
W/System.err(6406): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
W/System.err(6406): at android.view.View.draw(View.java:6742) 
W/System.err(6406): at android.widget.FrameLayout.draw(FrameLayout.java:352) 
W/System.err(6406): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1872) 
W/System.err(6406): at android.view.ViewRoot.draw(ViewRoot.java:1422) 
W/System.err(6406): at android.view.ViewRoot.performTraversals(ViewRoot.java:1167) 
W/System.err(6406): at android.view.ViewRoot.handleMessage(ViewRoot.java:1744) 
W/System.err(6406): at android.os.Handler.dispatchMessage(Handler.java:99) 
W/System.err(6406): at android.os.Looper.loop(Looper.java:143) 
W/System.err(6406): at android.app.ActivityThread.main(ActivityThread.java:4914) 
W/System.err(6406): at java.lang.reflect.Method.invokeNative(Native Method) 
W/System.err(6406): at java.lang.reflect.Method.invoke(Method.java:521) 
W/System.err(6406): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
W/System.err(6406): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
W/System.err(6406): at dalvik.system.NativeStart.main(Native Method) 
I/CameraService( 68): [Camera KPI] 1st preview frame 

Answer 1

在設置源和格式之前，您是否嘗試將相機設置爲媒體記錄器？ 是這樣的：

mediaRecorder = new MediaRecorder(); 
    Camera camera = Camera.open(); 

（也許是必要的解鎖攝像機）

(camera.unlock();) 

    mediaRecorder.setCamera(camera); 
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 
    ... 

對我來說，它的工作原理。