Blackmagic Forum

I'm trying to get camera control working. If I'm doing the right thing (probably not), should I expect to see changes in the Software control panel, even if no camera is connected?

public void CamerIris(uint CameraID, short IrisValue)
{
IBMDSwitcherCameraControl xcameraControl = (IBMDSwitcherCameraControl)switcher;
xcameraControl.SetInt16s(CameraID, 0, 3, 1, ref IrisValue);
}

switcher object is valid and I can read the GetPeriodicFlushInterval value fine with
cameraControl.GetPeriodicFlushInterval(out _PeriodicFlushInterval);

Guessing it is something to do with the by ref value.
C++ example shows this as an array but I have not found any option to make that work in C#

Bound to be something simple, Anyone know what I'm doing wrong?

Hi Ian,

In the Camera Control manual - command 0.3 is expecting type fixed16 (with range 0.0 to 1.0), so you will need to set with IBMDSwitcherCameraControl::SetFloats method.

The setting for iris in the ATEM Software Control software follows command 0.2 - Aperture (f-stop), not command 0.3, so you will not see the setting update.

Regards
Cameron

Thanks Cameron,
I managed to get display settings updating on a camera like

public void CameraDisplayBrightness(uint CameraID, double BrightnessValue)
{
IBMDSwitcherCameraControl xcameraControl = (IBMDSwitcherCameraControl)switcher;
xcameraControl.SetFloats(CameraID, 4, 0, 1, BrightnessValue);
}

It helped when I figured out that CameraID starts at 0 for the first camera mapped to an ATEM input, not the actual camera ID set in the camera.

But I still can't get lens or chip settings to change. Had only ust picked up a Studio camera so need to check it has latest firmware.

Hi Ian,

What commands are you sending to the camera, and which model/firmware studio camera?

Regards
Cameron

Thanks for perservering with me.
Managed to get Iris working. I think it was another computer running the software panel that kept overwriting the values I was send by code (Flush?)
So I can get single value data types working but not the ones that require index of more than 1.
E.g. I if I want to set the gain of all colors at the same time (like the wheel in the software does, thought I would do something like
public void CamerGain(uint CameraID, double gainValue)
{
double[] gainvalues = new double[3];
for (int values = 0; values <4; values++)
{
gainvalues[values] = gainValue;
}
IBMDSwitcherCameraControl xcameraControl = (IBMDSwitcherCameraControl)switcher;
xcameraControl.SetFloats(CameraID, 8, 2, 4, gainvalues);
}

but SetFloats won't take an array.
Using ATEM 7.3 API. Camera is Studio 4k 2.

Still need help with color setting but here is basic control of camera from Midi device