Unable to change the node execution rate

[AvinashNargund]

Hi, thanks for open-sourcing this piece of code!
I have been using this to capture images from an Arducam OV9281 camera connected to my Linux workstation. However, I find that the node publishes at 10 Hz (I used rostopic hz cv_camera/image_raw to check) instead of the default 30 Hz. Moreover, setting the rate explicitly does not change the publishing rate. Is there a way fix this? Maybe I am missing something here? It would be great if you could help me out here.

Thanks!