会报开启摄像头失败

[qyd9212]

Process: com.serenegiant.usbcameratest4:uvcservice, PID: 27287
java.lang.UnsupportedOperationException: open failed:result=-1
at com.serenegiant.usb.UVCCamera.open(UVCCamera.java:204)
at com.serenegiant.service.CameraServer$CameraThread.handleOpen(CameraServer.java:379)
at com.serenegiant.service.CameraServer.handleMessage(CameraServer.java:262)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at com.serenegiant.service.CameraServer$CameraThread.run(CameraServer.java:632)