Quest Pro and blinking detection in Unreal Engine

I have the same problem in Unity. Did you ever find a solution?

Considering reading the value of "FaceExpression.EyesClosed" in OVRFaceExpressions as a temporary fix.

Also interested in this, I'll be trying to read the FaceExpression.EyesClosed value in the meantime. 

EyeClosed Value is always zero when I tried 😞
Any update on this thread? Were you guys ( ccd_research JensNimiqueta virtualHCG ) able to get any value apart from zero using FaceExpression.EyesClosed ?

I would really appreciate your time and effort into this matter. Thanks in Advance!

Hi! Thanks for the reminder.

I was able to get it working on Meta Quest Pro using a `OVRFaceExpressions` instance attached to a `GameObject` in my scene.

Within the script to manage eye tracking data collection, I get the `OVRFaceExpressions` instance using something like this:

// Top of the class
private OVRFaceExpressions faceComponent;

// `Start` function
public void Start()
{
    // ...
    faceComponent = FindObjectOfType<OVRFaceExpressions>();
    // ...
}

I have the following in my `Update` method collecting the actual `EyesClosed` estimates:

float LBlinkWeight = -1.0f;
float RBlinkWeight = -1.0f;
if (faceComponent)
{
    faceComponent.TryGetFaceExpressionWeight(OVRFaceExpressions.FaceExpression.EyesClosedL, out LBlinkWeight);
    faceComponent.TryGetFaceExpressionWeight(OVRFaceExpressions.FaceExpression.EyesClosedR, out RBlinkWeight);
}

I was able to get values aside from 0.0 or 1.0 out of this. Make sure in your OVR Manager instance you've selected all the options to enable face tracking, as it's separate to eye tracking. Settings I changed for face tracking:

• Quest Features -> General -> Face Tracking Support -> "Required"
• Movement Tracking -> Face Tracking Data Sources -> Visual [x]; Audio [x]
• Permission Requests On Startup -> Face Tracking [x]

EDIT: I know this thread is Unreal Engine, this solution is in Unity. I figured I'd reply anyway in case it is helpful.