I just wanted to confirm that this is still an unresolved issue for me
(I made the error of creating a github issue when I should have posted
here first).
Has anyone ever come across such a problem? Or can anyone suggest what
can I can do to further debug this issue?
Regards,
Alex
On 25/08/17 15:36, Alex Biddulph wrote:
I have 2 PointGrey Flea3 USB3 cameras connected an Ubuntu 17.04 server system. I did not compile the viewer or gstreamer aspects of Aravis as I do not require this functionality in my system.
I can successfully use |arv-tool-0.6| to list all of the features of both of my cameras and I can use a simple custom program (using Aravis) to display basic information about the USB devices (id, serial number, vendor). I am also able to compile and run |arvexample.c| and it seems to open a camera and print out a frame rate of 60Hz.
However, when I try to open my cameras from my multi-threaded c++ application I am unable to claim the usb interface for either of my cameras. Here is debugginh the output from Aravis (I added some extra debug statement to help pinpoint the issue).
[UvDevice::new] Vendor = Point Grey Research
[UvDevice::new] Product = Flea3 FL3-U3-13E4C
[UvDevice::new] S/N = 00E81B94
[UvDevice::new] Using control endpoint 2, interface 0
[UvDevice::new] Using data endpoint 1, interface 2
[UvDevice::new] Failed to claim USB control interface to 'Flea3 FL3-U3-13E4C - #00E81B94', LIBUSB_ERROR_BUSY
(process:6822): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Found 2 USB3Vision devices (among 6 USB devices)
[UvDevice::new] Vendor = Point Grey Research
[UvDevice::new] Product = Flea3 FL3-U3-13E4C
[UvDevice::new] S/N = 00E81B94
[UvDevice::new] Using control endpoint 2, interface 0
[UvDevice::new] Using data endpoint 1, interface 2
[UvDevice::new] Failed to claim USB control interface to 'Flea3 FL3-U3-13E4C - #00E81B94', LIBUSB_ERROR_BUSY
(process:6822): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
While the application is multi-threaded, object creation and camera connection is all happening inside a single thread.
All applications that I have described are run from the same user, so I do not think there is an issue with permissions. There also does not seem to be any other services/programs using the cameras either.
Can you provide any help with debugging this issue?
Regards,
Alex
