Camera preview not working

[danigamba]

Describe the bug
The camera preview remains black and does not show frames captured from the camera.

To Reproduce

• Install harvesters-gui from pypi
• Run the example script

Desktop (please complete the following information):

• OS: Ubuntu 18.04 LTS (both with Gnome and Xfce)
• Python 3.6.8

I tryed different verstions of PyQt and VisPy but seems like anything is working.
I can correctly acquire frames from the harvesters core example.

Using a Teledyne Dalsa Genie Nano

[kazunarikudo]

Hi Daniele,

Thank you for your report and for trying out Harvester!

One question: Which version of VisPy did you try to use with Harvester GUI? I think I have not specified VisPy version so you would get the latest version. However, I have just noticed they have already started to release on the 0.6 line that I had never tried before. Yeah, you might have confirmed Harvester GUI failed to work with a 0.5 but it's okay, we would nail it soon or later.

Best regards,
Kazunari

[danigamba]

Hi Kazunari,
thank you for the response.

I tryed

• vispy 0.5.3, black screen
• vispy 0.4.0, TypeError: message_handler() takes 2 positional arguments but 3 were given
• vispy 0.6.2, black screen

In my current setup I have installed

• harvesters 0.2.13
• harvesters-gui 0.2.5
• pyqt 5.13.2

If you have a working setup can you please tell me which version are currently working? I'm willing to help updating the code if necessary.

Thank you,
Daniele

[kazunarikudo]

Sorry for the delay. I have just confirmed the issue and the root cause is coming from the change made on Harvester version 0.2.13. I will fix the issue later. Thank you for your patience.

[kazunarikudo]

Sorry having kept you waiting for such long. I have just released version 0.3 that fixes the issue. Please let me know if it does not work for you. /Kazunari