Pi Zero 2W picore 15 - cam server

[piran]

Hi,
I'm trying to get a Pi zero acting as a cam server either using a USB camera or the Pi camera. I have it working in raspbian where it's serving the difference between frames but it's very slow.
So I thought I would give Tiny core a go as it's so much lighter and faster than raspbian. I've had some help (thanks) and have got X up and running and can connect to a network via the wifi (albeit manually on every boot, which isn't ideal) but I'm also trying to get the camera working. I've installed the rpicam apps but it isn'nt working. rpicam-hello -n gives errors with the IPAModule:
Symbol ipaModuleInfo not found
v4l2-compat.so: IPA module has no valid info
libcamera v0.3.0+65-6ddd79b5
Error: *** no cameras available ***

Any ideas?
Thanks

[piran]

If I plug a USB camera in cam will find it (still has the same errors though) but if I try to use cam to capture an image it appears to hang the Pi although I can ssh in and reboot it

[piran]

Ok, so I have it working with the usb camera but not the Pi camera.
I need to dig through the book a bit more to work out the performance of boot/shutdown as I had to install some python libraries (numpy, opencv, flask) .
Once it's actually running it's massively quicker than anything else I've tried - very impressed so far.