VideoPlayer播放组件详解-Unity使用官方组件播放视频

本次Demo演示工具介绍：Unity版本：2020.3.25，Visual Studio版本： 2020；
1：使用Unity新建一个工程，新建空场景并保存，然后在Project面板下新建几个文件夹：Res,Resources，Scence,Scripts,此三个文件夹放一个根目录VideoPlayerDemo，目录如下；这是我的习惯，大家随意；

2:Res文件夹下创建一个Render Texture，Hierarchy面板下创建一个画布，再创建RawImage，相机设置为纯色渲染，Projection设置为Orthographic模式，画布设置ScreenSpace_Camera模式，并将主相机赋值给画布的渲染相机，RawImage设置为随画布拉伸的方式，锚点的右下角那个点一下；
3：新建一个面板Controller，将再该面板中编写相关播放控制功能；Slider-进度条，Dropdown-播放速度，两个Text文本设置播放时间，还有个播放按钮。

4：新建类VideoController挂载到控制面板上；

    /// 

    /// 绑定拖拽功能
    /// 
    /// 
    /// 
    /// 
    public static void AddTriggersListener(GameObject obj, EventTriggerType eventID, UnityAction<BaseEventData> action)
    {
        EventTrigger trigger = obj.GetComponent<EventTrigger>();
        if (trigger == null)
        {
            trigger = obj.AddComponent<EventTrigger>();
        }

        if (trigger.triggers.Count == 0)
        {
            trigger.triggers = new List<EventTrigger.Entry>();
        }

        UnityAction<BaseEventData> callback = new UnityAction<BaseEventData>(action);
        EventTrigger.Entry entry = new EventTrigger.Entry();
        entry.eventID = eventID;
        entry.callback.AddListener(callback);
        trigger.triggers.Add(entry);
    }

   public class VideoController : MonoBehaviour
    {
        private Slider slider;
        private Text totleTimer;
        private Text culTimer;
        private Dropdown speedValue;
        private Button playbtn;
        private Sprite PlaySP;
        private Sprite PuaseSP;
        bool isPause = false;
        private VideoPlayer video;

        private void Awake()
        {
            slider =Config<Slider>.GetComponent(transform, "ProsseSlider");
            speedValue = Config<Dropdown>.GetComponent(transform, "SpeedDropdown");
            totleTimer = Config<Text>.GetComponent(transform, "TotleTimer");
            culTimer = Config<Text>.GetComponent(transform, "CulTimer");
            playbtn = Config<Button>.GetComponent(transform, "PlayeBtn");
            PlaySP= Resources.Load<Sprite>("UITexture/播放");
            PuaseSP = Resources.Load<Sprite>("UITexture/暂停");
            video = Config<VideoPlayer>.GetComponent(transform.parent, "VideoPlayer");
            speedValue.onValueChanged.AddListener(DropdownOnClick);
        }

        private void DropdownOnClick(int arg0)
        {
            var value =float.Parse( speedValue.options[arg0].text.Replace("倍速 x ", ""));

            video.playbackSpeed = value;
        }
       
        // Start is called before the first frame update
        void Start()
        { 
            playbtn.GetComponent<Image>().sprite = PuaseSP;
            //视频播放结束事件
            video.loopPointReached += EndWithVideoPlay;
            //播放按钮监听
            playbtn.onClick.AddListener(PlayBtnOnClick);
            //添加Slider拖拽事件
            Utils.AddTriggersListener(slider.gameObject, EventTriggerType.Drag, OnDrag);
        }

        private void OnDrag(BaseEventData arg0)
        { 
            //踩坑记: 强制转换  long 的时候先将算法算出来之后得到float类型，然后再将结果强转，直接算法强转结果一直为0；
            float tatol = slider.value * video.frameCount;
            video.frame = (long)tatol;
        }
        /// 

        /// 清除上一帧渲染
        /// 
        private void RemoveTargetframe()
        {
          video.targetTexture.Release();
          video.targetTexture.MarkRestoreExpected(); 
        }
        /// 

        /// 显示当前视频的时间
        /// 
        private void ShowVideoTime() 
        { 
            try
            {
                if (video != null && video.isPlaying)
                {
                    //视频帧率  每秒多少帧；
                    float frameRate = video.frameRate;
                    int clipHour = (int)((float)video.frameCount / frameRate / (float)3600);
                    int clipMinute = (int)((float)video.frameCount / frameRate - (float)clipHour * (float)3600) / 60;
                    int clipSecond = (int)((float)video.frameCount / frameRate - (float)clipHour * (float)3600 - (float)clipMinute * (float)60);
                    // 当前的视频播放时间
                    int currentHour = (int)video.time / 3600;
                    int currentMinute = (int)(video.time - currentHour * 3600) / 60;
                    int currentSecond = (int)(video.time - currentHour * 3600 - currentMinute * 60);

                    string culTime = string.Format("{0:D2}:{1:D2}:{2:D2}", currentHour, currentMinute, currentSecond);
                    string totalTime = string.Format("{0:D2}:{1:D2}:{2:D2}", clipHour, clipMinute, clipSecond);
                    culTimer.text = culTime;
                    totleTimer.text = totalTime;
                    slider.value = (float)video.frame / (float)video.frameCount;
                }
            }
            catch (Exception e)
            {
                print(e.Message);
            }

        }
        private void PlayBtnOnClick()
        {
            isPause = isPause ? false : true;
            playbtn.GetComponent<Image>().sprite = isPause ? PlaySP : PuaseSP;
            if (isPause)
                video.Pause();
            else
                video.Play();
        }

        private void EndWithVideoPlay(VideoPlayer source)
        {
            print("视频播放结束");
        }

        // Update is called once per frame
        void Update()
        {
            ShowVideoTime();
        }
    }

虽然该有的功能都有，但还是建议大家使用AVPRO插件，个人觉得它比较友好，支持webgl，官方的api我使用在webgl的时候发现老是黑屏，播放不了的情况。AVPRO解决了我的问题。
最后看效果吧：