CameraSmooth.cs

using UnityEngine;
using System.Collections;

public class CameraSmooth
    : MonoBehaviour
{
    public Camera cameraTarget;
    public Camera cameraSelf;
    public bool enableSmooth = true;

    [Range(0.0f, 12.0f)]
    public float lerpPositionRate = 8.0f;
    [Range(1.0f, 12.0f)]
    public float lerpRotationRate = 4.0f;

    public void Start()
    {
        if (!cameraSelf)
            cameraSelf = GetComponent<Camera>();

        cameraTarget = PlayerCameraSupport.GetCamera();

        // just make sure smooth camera set to None (Main Display)
        // vive will render the both eyes camera, and main game window will show smooth
        cameraSelf.stereoTargetEye = StereoTargetEyeMask.None;
        cameraSelf.targetDisplay = 0;
        cameraSelf.fieldOfView = GameSettings.Instance.OptionEnableCameraSmoothingFOV;

        cameraSelf.nearClipPlane = cameraTarget.nearClipPlane;
        cameraSelf.farClipPlane = cameraTarget.farClipPlane;
        cameraSelf.transform.position = cameraTarget.transform.position;
        cameraSelf.transform.rotation = cameraTarget.transform.rotation;

        cameraTarget.targetDisplay = 0;
    }

    public void FixedUpdate()
    {
        if (!cameraTarget)
            return;

        var posRate = lerpPositionRate;
        var rotRate = lerpRotationRate;

        if (enableSmooth)
        {
            transform.position = Vector3.Lerp(transform.position, cameraTarget.transform.position, Mathf.Clamp01(posRate * Time.fixedDeltaTime));
            transform.rotation = Quaternion.Slerp(transform.rotation, cameraTarget.transform.rotation, Mathf.Clamp01(rotRate * Time.fixedDeltaTime));
        }
        else
        {
            transform.position = cameraTarget.transform.position;
            transform.rotation = cameraTarget.transform.rotation;
        }
    }
}

Are you using external classes? My unity (2017.1) says context does not include PlayerCameraSupport or GameSettings.

For anyone else having issues with with "PlayerCameraSupport" and "GameSettings", simply comment out line 21, and for line 27 (fov), just put whatever value you want for the camera field of view (I put 60) instead of "GameSettings.Instance.OptionEnableCameraSmoothingFOV".

What is the licence for this?