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Published 20 hours ago • verified publisher icon saki4510t

could not open camera:err=-50

Open ankitm099 opened this issue 7 years ago • 14 comments

I did downgrade the ndk version to 14b. still getting the error while opening camera.

Same code working on Moto G 5.0. but app crashing on samsung's all devices (I tried on Galaxy s4 and s5) 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/libuvc/device: [28050device.c:944:uvc_scan_control]:UVC_ERROR_INVALID_DEVICE 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/UVCCamera: [28050UVCCamera.cpp:172:connect]:could not open camera:err=-50 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/AndroidRuntime: FATAL EXCEPTION: BaseActivity Process: com.serenegiant.usbcameratest, PID: 28018 java.lang.UnsupportedOperationException: open failed:result=-50 at com.serenegiant.usb.UVCCamera.open(UVCCamera.java:204) at com.serenegiant.usbcameratest.MainActivity$2$1.run(MainActivity.java:142) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:145) at android.os.HandlerThread.run(HandlerThread.java:61)

ankitm099 avatar Feb 19 '18 14:02 ankitm099

@ankitm099 I'm also receiving this error on a Samsung S4. @saki4510t any comment on this?

davidhowe avatar Mar 05 '19 11:03 davidhowe

I have the same issue: e = {UnsupportedOperationException@4238} "java.lang.UnsupportedOperationException: open failed:result=-50----->id_camera=2941849728;venderId=3034;productId=46880;fileDescriptor=65;busNum=1;devAddr=5;usbfs=/dev/bus/usb\nException:nativeConnect return value: -50" cause = {UnsupportedOperationException@4238} "java.lang.UnsupportedOperationException: open failed:result=-50----

huasheng0401 avatar Mar 23 '19 06:03 huasheng0401

Having same issues . Did any one find any solution .

2020-09-03 17:28:41.756 29245-29366/com.jiangdg.usbcamera E/libuvc/device: [29366*device.c:944:uvc_scan_control]:UVC_ERROR_INVALID_DEVICE
2020-09-03 17:28:41.756 29245-29366/com.jiangdg.usbcamera E/UVCCamera: [29366*UVCCamera.cpp:172:connect]:could not open camera:err=-50
2020-09-03 17:30:18.999 29245-29366/com.jiangdg.usbcamera E/libuvc/device: [29366*device.c:944:uvc_scan_control]:UVC_ERROR_INVALID_DEVICE
2020-09-03 17:30:18.999 29245-29366/com.jiangdg.usbcamera E/UVCCamera: [29366*UVCCamera.cpp:172:connect]:could not open camera:err=-50

arpitcybernetyx avatar Sep 03 '20 14:09 arpitcybernetyx

Facing the same issue with OnePlus 7 & ezCap UVC device, any help appreciated.

paijwar avatar Sep 03 '20 17:09 paijwar

我也同样遇到了这个问题。我发现出现这个问题的设备，在git拉来的最新代码运行过程中会出现，但是在下载的apk中却能正常运行，希望作者能给出apk中的解决方案，或者提供编译apk的源码。 LOG： E/libuvc/device: [7184device.c:944:uvc_scan_control]:UVC_ERROR_INVALID_DEVICE E/UVCCamera: [7184UVCCamera.cpp:178:connect]:could not open camera:err=-50

CarryHekangkai avatar Sep 11 '20 01:09 CarryHekangkai

@CarryHekangkai 您是从哪里获得下载的apk的？ 您能否分享与USB UVC设备一起使用的apk？

paijwar avatar Sep 11 '20 03:09 paijwar

@CarryHekangkai 您是从哪里获得下载的apk的？ 您能否分享与USB UVC设备一起使用的apk？

是这个项目中提供的apk，我之前搞混了。 https://github.com/jiangdongguo/AndroidUSBCamera

CarryHekangkai avatar Sep 11 '20 03:09 CarryHekangkai

@CarryHekangkai 感谢您分享这一点。 我也尝试过但无法从pgyer.com下载该应用程序，您可以通过将其上传到某个地方或直接在此处来帮助我使用apk。 我也尝试从源代码编译此文件，但从源代码无法正常工作，我的设备是Somagic EasyCapture 1c88：1001，它在device.c：944上失败 您是否遇到相同的问题？

paijwar avatar Sep 11 '20 04:09 paijwar

@CarryHekangkai 感谢您分享这一点。 我也尝试过但无法从pgyer.com下载该应用程序，您可以通过将其上传到某个地方或直接在此处来帮助我使用apk。 我也尝试从源代码编译此文件，但从源代码无法正常工作，我的设备是Somagic EasyCapture 1c88：1001，它在device.c：944上失败 您是否遇到相同的问题？

你可以给我你的邮箱

CarryHekangkai avatar Sep 11 '20 05:09 CarryHekangkai

您可以通过paijwar与我联系[在gmail.com

paijwar avatar Sep 11 '20 06:09 paijwar

I encountered this error. There were 3 entries associated with one camera that was plugged into my device. I selected one of the other entries and this worked. No more error. Not sure why there are 3 entries for one camera though.

jinglebiscuitsHL avatar Jul 21 '21 21:07 jinglebiscuitsHL

不解决了吗 作者 java.lang.UnsupportedOperationException: open failed:result=-50

zaobin032411 avatar May 20 '22 12:05 zaobin032411

I did downgrade the ndk version to 14b. still getting the error while opening camera.

Same code working on Moto G 5.0. but app crashing on samsung's all devices (I tried on Galaxy s4 and s5) 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/libuvc/device: [28050_device.c:944:uvc_scan_control]:UVC_ERROR_INVALID_DEVICE 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/UVCCamera: [28050_UVCCamera.cpp:172:connect]:could not open camera:err=-50 02-19 19:19:06.571 28018-28050/com.serenegiant.usbcameratest E/AndroidRuntime: FATAL EXCEPTION: BaseActivity Process: com.serenegiant.usbcameratest, PID: 28018 java.lang.UnsupportedOperationException: open failed:result=-50 at com.serenegiant.usb.UVCCamera.open(UVCCamera.java:204) at com.serenegiant.usbcameratest.MainActivity$2$1.run(MainActivity.java:142) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:145) at android.os.HandlerThread.run(HandlerThread.java:61)

Question ：This is my error：UVC_ERROR_INVALID_DEVICE not open camera:err=-50 ！！！ Answer ：mCameraHelper.requestPermission(0)是默认打开第一个usb设备， 但是实际上所使用的usb摄像头并未处于第一位， 因此将requestPermission(0)改为requestPermission(1)或其他数字后再进行测试 ，一般就可以解决问题了。

network2006 avatar May 31 '22 07:05 network2006

不解决了吗 作者 java.lang.UnsupportedOperationException: open failed:result=-50

mCameraHelper.requestPermission(0)是默认打开第一个usb设备， 但是实际上所使用的usb摄像头并未处于第一位， 因此将requestPermission(0)改为requestPermission(1)或其他数字后再进行测试 ，一般就可以解决问题了。

network2006 avatar May 31 '22 07:05 network2006