如何使用json在unity3d中进行云识别视频播放

Question

朋友们，我打算团结一致地开展基于云的视频播放项目。在我的项目中，云目标正在检测但视频没有播放。我需要做基于json的云识别来播放视频，但我不知道该怎么做。

这是我的代码供您参考：

using System;
using UnityEngine;
using Vuforia;
using UnityEngine.UI;

/// <summary>
/// This MonoBehaviour implements the Cloud Reco Event handling for this sample.
/// It registers itself at the CloudRecoBehaviour and is notified of new search results.
/// </summary>
public class SimpleCloudHandler : MonoBehaviour, ICloudRecoEventHandler
{
    #region PRIVATE_MEMBER_VARIABLES

    // CloudRecoBehaviour reference to avoid lookups
    private CloudRecoBehaviour mCloudRecoBehaviour;
    // ImageTracker reference to avoid lookups
    private ObjectTracker mImageTracker;

    private bool mIsScanning = false;

    private string mTargetMetadata = "";
    private GameObject videoObject;

    #endregion // PRIVATE_MEMBER_VARIABLES



    #region EXPOSED_PUBLIC_VARIABLES

    /// <summary>
    /// can be set in the Unity inspector to reference a ImageTargetBehaviour that is used for augmentations of new cloud reco results.
    /// </summary>
    public ImageTargetBehaviour ImageTargetTemplate;


    #endregion

    #region UNTIY_MONOBEHAVIOUR_METHODS

    /// <summary>
    /// register for events at the CloudRecoBehaviour
    /// </summary>
    void Start()
    {
        // register this event handler at the cloud reco behaviour
        CloudRecoBehaviour cloudRecoBehaviour = GetComponent<CloudRecoBehaviour>();
        if (cloudRecoBehaviour)
        {
            cloudRecoBehaviour.RegisterEventHandler(this);
        }

        // remember cloudRecoBehaviour for later
        mCloudRecoBehaviour = cloudRecoBehaviour;

    }

    #endregion // UNTIY_MONOBEHAVIOUR_METHODS


    #region ICloudRecoEventHandler_IMPLEMENTATION

    /// <summary>
    /// called when TargetFinder has been initialized successfully
    /// </summary>
    public void OnInitialized()
    {
        // get a reference to the Image Tracker, remember it
        mImageTracker = (ObjectTracker)TrackerManager.Instance.GetTracker<ObjectTracker>();
    }

    /// <summary>
    /// visualize initialization errors
    /// </summary>
    public void OnInitError(TargetFinder.InitState initError)
    {
    }

    /// <summary>
    /// visualize update errors
    /// </summary>
    public void OnUpdateError(TargetFinder.UpdateState updateError)
    {
    }

    /// <summary>
    /// when we start scanning, unregister Trackable from the ImageTargetTemplate, then delete all trackables
    /// </summary>
    public void OnStateChanged(bool scanning) {
        mIsScanning = scanning;
        if (scanning) {
            // clear all known trackables
            ObjectTracker tracker = TrackerManager.Instance.GetTracker<ObjectTracker> ();
            tracker.TargetFinder.ClearTrackables (false);
        }
    }

    /// <summary>
    /// Handles new search results
    /// </summary>
    /// <param name="targetSearchResult"></param>
    public void OnNewSearchResult(TargetFinder.TargetSearchResult targetSearchResult)
    {
        // duplicate the referenced image target
        GameObject newImageTarget = Instantiate(ImageTargetTemplate.gameObject) as GameObject;



        GameObject augmentation = null;

        string model_name = targetSearchResult.MetaData;


        if( augmentation != null )
            augmentation.transform.parent = newImageTarget.transform;

        // enable the new result with the same ImageTargetBehaviour:

        //Debug.Log("Metadata value is " + model_name );
        //VideoPlaybackBehaviour video = ImageTargetTemplate.gameObject.GetComponentInChildren<VideoPlaybackBehaviour>();
        mTargetMetadata = model_name;
        if (targetSearchResult.MetaData == "a") {
            ImageTargetAbstractBehaviour imageTargetBehaviour = mImageTracker.TargetFinder.EnableTracking (targetSearchResult, newImageTarget);
        }


        if (!mIsScanning)
        {
            // stop the target finder
            mCloudRecoBehaviour.CloudRecoEnabled = true;
        }


    }


    #endregion // ICloudRecoEventHandler_IMPLEMENTATION
}