Unity VideoPlayer播放视频 Slider控制播放进度

using UnityEngine;

using UnityEngine.UI;
using UnityEngine.Video;
public class ToPlayVideo : MonoBehaviour
{

public VideoClip[] videoClips;      // 视频的文件 参数
public Text videoTimeText;          // 视频的当前时间 Text
public Text videoNameText;          // 视频的总时长 Text
public Slider videoTimeSlider;      // 视频的时间 Slider
// 定义参数获取VideoPlayer组件和RawImage组件
internal VideoPlayer videoPlayer;
private RawImage rawImage;
public Texture pingBao;             // 屏保图片
// 当前视频的总时间值和当前播放时间值的参数
private int currentHour;
private int currentMinute;
private int currentSecond;
private int clipHour;
private int clipMinute;
private int clipSecond;

public Sprite play;
public Sprite pause;
private bool isPlay = true;          //是否正在播放视频
public Button playPauseButton;       //播放暂停按钮
public Button stopButton;            //停止播放按钮
public Button button1;
public Button button2;
public Button button3;
public Button button4;

// Use this for initialization
void Start()
{
    //清空文本
    videoNameText.text = "";
    videoTimeText.text = "";

    //获取场景中对应的组件
    videoPlayer = this.GetComponent<VideoPlayer>();
    rawImage = this.GetComponent<RawImage>();
    videoPlayer.audioOutputMode = VideoAudioOutputMode.AudioSource;
    videoPlayer.SetTargetAudioSource(0, this.GetComponent<AudioSource>());
    videoPlayer.playOnAwake = false;
    videoPlayer.IsAudioTrackEnabled(0);

    playPauseButton.onClick.AddListener(PlayOrPause);
    stopButton.onClick.AddListener(StopVideo);
    button1.onClick.AddListener(delegate { OnClick(0); });
    button2.onClick.AddListener(delegate { OnClick(1); });
    button3.onClick.AddListener(delegate { OnClick(2); });
    button4.onClick.AddListener(delegate { OnClick(3); });
}

// Update is called once per frame
void Update()
{
    //如果videoPlayer没有对应的视频texture，则返回屏保
    if (videoPlayer.texture == null)
    {
        rawImage.texture = pingBao;
        return;
    }
    //把VideoPlayerd的视频渲染到UGUI的RawImage
    rawImage.texture = videoPlayer.texture;
    ShowVideoTime();
}

/// <summary>
/// 显示当前视频的时间
/// </summary>
private void ShowVideoTime()
{
    // 当前的视频播放时间
    currentHour = (int)videoPlayer.time / 3600;
    currentMinute = (int)(videoPlayer.time - currentHour * 3600) / 60;
    currentSecond = (int)(videoPlayer.time - currentHour * 3600 - currentMinute * 60);
    // 把当前视频播放的时间显示在 Text 上
    videoTimeText.text = string.Format("{0:D2}:{1:D2}:{2:D2}",
        currentHour, currentMinute, currentSecond);
    // 把当前视频播放的时间比例赋值到 Slider 上
    videoTimeSlider.value = (float)(videoPlayer.time / videoPlayer.clip.length);
}

/// <summary>
/// 显示视频的总时长
/// </summary>
/// <param name="videos">当前视频</param>
void ShowVideoLength(VideoClip videos)
{
    videoPlayer.clip = videos;
    videoPlayer.Play();
    videoTimeSlider.gameObject.SetActive(true);
    clipHour = (int)videoPlayer.clip.length / 3600;
    clipMinute = (int)(videoPlayer.clip.length - clipHour * 3600) / 60;
    clipSecond = (int)(videoPlayer.clip.length - clipHour * 3600 - clipMinute * 60);
    videoNameText.text = string.Format("{0:D2}:{1:D2}:{2:D2} ",
         clipHour, clipMinute, clipSecond);
}

private void OnClick(int num)
{
    switch (num)
    {
        case 0:
            ShowVideoLength(videoClips[0]);
            break;
        case 1:
            ShowVideoLength(videoClips[1]);
            break;
        case 2:
            ShowVideoLength(videoClips[2]);
            break;
        case 3:
            ShowVideoLength(videoClips[3]);
            break;
        case 4:
            ShowVideoLength(videoClips[4]);
            break;
        default:
            break;
    }
}

/// <summary>
/// 视频播放暂停
/// </summary>
void PlayOrPause()
{
    //如果视频片段不为空，并且视频画面没有播放完毕
    if (videoPlayer.clip != null && (ulong)videoPlayer.frame < videoPlayer.frameCount)
    {
        //如果视频正在播放
        if (isPlay)
        {
            playPauseButton.image.sprite = pause;
            videoPlayer.Pause();
            isPlay = false;
        }
        else
        {
            playPauseButton.image.sprite = play;
            videoPlayer.Play();
            isPlay = true;
        }
    }
}

void StopVideo()
{
    videoPlayer.Stop();
    playPauseButton.image.sprite = play;
    videoTimeSlider.gameObject.SetActive(false);
    videoNameText.text = "";
    videoTimeText.text = "";
    isPlay = true;
}

}

using UnityEngine;

using UnityEngine.EventSystems;
/// <summary>
/// 继承 拖拽接口
/// </summary>
public class SliderEvent : MonoBehaviour, IDragHandler, IEndDragHandler
{

[SerializeField]
public ToPlayVideo toPlayVideo;        // 视频播放的脚本

// Use this for initialization
void Start()
{

}

// Update is called once per frame
void Update()
{

}

/// <summary>
/// 给 Slider 添加开始拖拽事件
/// </summary>
/// <param name="eventData"></param>
public void OnDrag(PointerEventData eventData)
{
    toPlayVideo.videoPlayer.Pause();
    SetVideoTimeValueChange();
}

/// <summary>
/// 当前的 Slider 比例值转换为当前的视频播放时间
/// </summary>
private void SetVideoTimeValueChange()
{
    toPlayVideo.videoPlayer.time = toPlayVideo.videoTimeSlider.value * toPlayVideo.videoPlayer.clip.length;
}

/// <summary>
/// 给 Slider 添加结束拖拽事件
/// </summary>
/// <param name="eventData"></param>
public void OnEndDrag(PointerEventData eventData)
{
    toPlayVideo.videoPlayer.Play();
}

}