mmal: Failed to fix lens shading, use the default mode!

[sjbeskur]

Hi I'm trying to use this excellent Rust wrapper with my arducam stereo camera but I keep getting an Error when I call the capture() function.

I have crawled through your code and the arducam c library but I cannot figure out what I'm doing wrong. The only indication I see is the message:
mmal: Failed to fix lens shading, use the default mode!

here is a snippet of how I am calling into the api:

'

let cam = CameraInterface{
    i2c_bus: 0,       // /dev/i2c-0  or /dev/i2c-1 
    camera_num: camera_number,    // mipi interface num
    sda_pins: [44, 0], // enable sda_pins[camera_num], disable sda_pins[camera_num ? 0 : 1]
    scl_pins: [45, 1], // enable scl_pins[camera_num], disable scl_pins[camera_num ? 0 : 1]
    led_pins:[30,2],
    shutdown_pins: [133,133],
};

println!("Initializing Camera!");
let mut camera = arducam_mipicamera::Camera::init(Some(cam)).unwrap();

println!("\nCapturing Image:");
let result = camera.capture(3000, Encoding::Png, 50);
println!("\nCapture result is_ok: {:?}", result.is_ok());

let buffer = result.unwrap(); // everything goes wrong here

`
All of the FFI calls seem to call the arducam_mipicamera.h and I have compared this to other examples in that project "capture-dualcam.c" and while that program works I cannot seem to figure what might be different.

Any help would be greatly appreciated.