"We offer new support options and therefor the forums are now in read-only mode! Please check out our Support Center for more information." - Vuforia Engine Team

cameraDeviceStartCamera not called

By chriszz on Fri, 08/28/2020 - 02:41

I have two cameras, on android, one works, one not work.

the ok log:

08-28 09:57:25.658 12196 12240 D UVCExternalCamera: UVC_PU_ANALOG_LOCK_STATUS_CONTROL supported: NO
08-28 09:57:25.658 12196 12240 D UVCExternalCamera: UVC_PU_CONTRAST_AUTO_CONTROL supported: not supported
08-28 09:57:25.658 12196 12240 D AR      : Determining the camera modes. Driver reports 5 different modes.
08-28 09:57:25.658 12196 12240 D AR      : Found 5 supported camera modes.
08-28 09:57:25.658 12196 12240 D AR      : Querying camera capabilities (exposure, focus)
08-28 09:57:25.675 12196 12240 D AR      : Camera capability query done
08-28 09:57:25.680 12196 12240 D Vuforia : cameraDeviceStartCamera
08-28 09:57:25.680 12196 12240 D AR      : Start external camera

the failed log:

08-28 10:14:13.339 14170 14207 D UVCExternalCamera: UVC_PU_ANALOG_LOCK_STATUS_CONTROL supported: NO
08-28 10:14:13.339 14170 14207 D UVCExternalCamera: UVC_PU_CONTRAST_AUTO_CONTROL supported: not supported
08-28 10:14:13.339 14170 14207 D AR      : Determining the camera modes. Driver reports 1 different modes.
08-28 10:14:13.339 14170 14207 D AR      : Found 1 supported camera modes.
08-28 10:14:13.339 14170 14207 D AR      : Querying camera capabilities (exposure, focus)
08-28 10:14:13.339 14170 14207 D AR      : Camera capability query done
08-28 10:14:13.367 14170 14207 I Unity   : Using Legacy Rendering 
08-28 10:14:13.367 14170 14207 I Unity   : (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
08-28 10:14:13.367 14170 14207 I Unity   : 
08-28 10:14:13.377 14170 14207 E AR      : VideoBackgroundConfig with screen size of zero received, skipping config step

In failed log, there is no cameraDeviceStartCamera, and no error or warning. What happended?