Error with OAK-D Pro

samuelgrc

Hello,

For a project I have to execute a python script ,which use the OAK-D Pro, from a web page but when I try to run it, I get the following error message :

[31mF: [global] [ 407152] [EventRead00Thr] usbPlatformRead:999 Cannot find file descriptor by key: 55 [0m

I'm pretty sure, the problem come from the OAK-D Pro because I've try with another camera and it's work.

Could you suggest me a solution ?

Thanks,

Samuel

jakaskerl

Hi @samuelgrc

samuelgrc I'm pretty sure, the problem come from the OAK-D Pro because I've try with another camera and it's work.

What device was it and did it work even when run from a separate process?

My thoughts are that perhaps this process does not have the full permissions to USB devices and fails because of it.

Thoughts?

jakaskerl

Hi @samuelgrc
What depthai version are you using and what host machine? Error usually indicates bad connection.

Thanks,
Jaka

samuelgrc

I'm using the version 2.24.0.0 on a Raspberry pi 4. I've tried to reconnect the usb cable but same error 🙁

I'm using an usb3 port and when I run the script from the terminal it's work.

The python script open 3 preview windows (ir, rgb and disparity), but if i run it from my php page this error appear.

jakaskerl

Hi @samuelgrc
What does the PHP backend look like? Is it running script in a separate thread/processs?

Thanks,
Jaka

samuelgrc

Hi @jakaskerl

The script run in a separate process. Here the php backend which call the python script :

I don't know what i've do but now the error message is just a php error "Resource id #6" but it's still not working.

Thanks,

Samuel

samuelgrc

Hi,

Oh no, I made a mistake saying the problem is with the OAK-D Pro. The OAK works fine but it's just when I try to run my python script which works fine, from my php page. Yes, maybe it's the permissions, I'll try to look into that.

Thanks