[Question] Cannot open camera video capture See verbosity level for more details.

[stereolabs]

[Question] Cannot open camera video capture See verbosity level for more details.

[Myzhar]

Hi @jjjmmmxxx
can you copy and paste the result of the $ lsusb command when the camera is connected?

[LilyGinger]

Thanks a lot. Things have been fixed. Something goes wrong with the USB cable. It is not the problem of the camera or this API. Thank u~

[LilyGinger]

Sorry to bother. It seems that I meet another problem. The examples except for the "zed_open_capture_sensors_example" and "zed_open_capture_sync_example" work well. But these two examples failed to run.

[Myzhar]

Can you post the output of the $ lsusb command?

[Myzhar]

Please also verify to have followed correctly the following installation steps:
https://github.com/stereolabs/zed-open-capture#add-udev-rule

If udev rules are not correctly installed the sensors module cannot be accessed without sudo rights

[LilyGinger]

This is the lsusb output:

I tried this process again and I found it's still like that: No available ZED Mini or ZED2 cameras

[LilyGinger]

It does seem something goes wrong when I follow the process for udev rules. When I add sudo before zed_open_capture_sensors_example, everything goes right.

[Myzhar]

Yes, that's because the ZED2i support was still missing in the udev rules.
I fixed it only 2 hours ago when I noticed it, you can pull the new version (v0.4.1) from Github that should fix the problem.
I'm really sorry for this annoying bug.

[LilyGinger]

Thank you very much for your help! I have one last question. Is the ZED2i supports TypeC-TypeC cable? I use the Camera == typeC----USB3.0 ==USB3.0----typeC==computer connection? When I use this connection, it printed like below:

[Myzhar]

Yes, it should work without any problems

[purpledeer111]

Hi,
same message when using ZED mini with debian 11.

$ zed_open_capture_video_example 
Cannot open camera video capture
See verbosity level for more details.

Device seems to be recognized in system

$ lsusb 
...
Bus 001 Device 014: ID 2b03:f681 STEREOLABS ZED-M HID Interface
...

How do I increase verbosity level? I dont see any parameters

    if( !cap.initializeVideo() )
    {
        std::cerr << "Cannot open camera video capture" << std::endl;
        std::cerr << "See verbosity level for more details." << std::endl;

        return EXIT_FAILURE;
    }

Add:
I have noticed that no additional videox entery was created in /dev/ directory

[BhavyanshM]

I have been getting the exact same error with ZED2 on Ubuntu 20.04. Followed all the instructions as mentioned on the README. The C++ node runs and generates data. However, after a while the node freezes and doesn't get any more data from the cameras.

Subsequent attempts at launching the node generate this message, and the node never starts again.

Only a complete computer reboot fixes it, which is a bit annoying because the freezes occur very regularly. Please help. Thank you so much.

[Yelloooowww]

I have the same issue and reboot couldn't help.

[Myzhar]

@Yelloooowww I'm sorry, but the reboot command only works starting from the ZED2 camera model.
The ZED-M does not have the electronic circuit for this behavior.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment otherwise it will be automatically closed in 5 days

[ernlavr]

I have the same problem as described by a few people above! I've followed the README, running Ubuntu 22.04, also installed udev rules

[Myzhar]

@ernlavr this is a closed issue. Please do not reply to closed issues.
Create a new one with all the required information and eventually tag this issue as a reference.