Doesn't work on Linux

[Frozenreflex]

Using this on a Babble tracker, Linux Mint 22.2, attempting to flash with both main and Summer's fork, both have the same issue, where applications (Cheese, Baballonia) can't pick up the camera properly. Cheese is able to show the correct name and resolution for the camera in the preferences menu, but shows an error instead of the image feed. From my searching, it seems to me like there's something wrong with the UVC metadata that Windows/DShow ignores, while GStreamer is more strict, but I'm not very familiar with how UVC works. It's not an issue with my machine, as running a Windows 10 VM and passing the tracker through works.

[lorow]

Hi! FIrst of all, sorry for super late reply and thank you for reporting this

From what I was able to gather about this, the problem seems to be with the bulk mode not working on Linux, no idea why, I haven't had the time to debug that yet.

Isochronous was supposed to just work, but its way slower than bulk so that's not ideal. You can change the mode in sdkconfig by changing:

# CONFIG_UVC_MODE_ISOC_CAM1 is not set
CONFIG_UVC_MODE_BULK_CAM1=y

to

CONFIG_UVC_MODE_ISOC_CAM1=y
# CONFIG_UVC_MODE_BULK_CAM1 is not set

I'll try to debug this futher when I get some time though!

[foxyote]

I have also run into some issues on linux both with Baballonia and Cameractrls. The fix @lorow gave worked to get the camera working with Cameractrls, but not Babbalonia. I also added this to my udev rules, which may be relevant:

SUBSYSTEM=="tty", ATTRS{idVendor}=="303a", ATTRS{idProduct}=="8000", MODE="0660", GROUP="users", TAG+="uaccess"

Edit: When running Babbalonia with super user privileges, I was able to get the camera working using this GStreamer string. I may need to add another rule somewhere.
v4l2src device=/dev/video4 ! image/jpeg,width=240,height=240,framerate=60/1 ! jpegdec ! videoconvert ! appsink