使用AVPro Video 加載視頻第一秒的圖片
原理：使用AVPro Video插件的MediaPlayer
mediaPlayer.OpenMedia(new MediaPath(url鏈接, MediaPathType.AbsolutePathOrURL), false);
然后等待一定時間
使用ExtractFrame截取視頻
Texture2D texture2D = mediaPlayer.ExtractFrame(null, 1);

UI效果：

點擊圖片進行播放，在點擊一下關閉播放

部分代碼：

using RenderHeads.Media.AVProVideo;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.Tracing;
using UnityEngine;
using UnityEngine.UI;

    [SerializeField] private MediaPlayer mediaPlayer;
    [SerializeField] private DisplayUGUI displayUGUI;           //顯示視頻
    //預制體 => 一個Image
    [SerializeField] private GameObject VideoPlayerPre;         //視頻
    
    [SerializeField] private bool LoadFinish;                   //所有鏈接都加載完成的標記
    
    // Start is called before the first frame update
    void Start()
    {
        Init();
    }
    
	private void Init()
    {
        if (mediaPlayer == null)
        {
            mediaPlayer = transform.Find("MediaPlayer").GetComponent<MediaPlayer>();
        }
        //mediaPlayer.Events.AddListener(OnMediaPlayerEvent); //事件監(jiān)聽

        if (displayUGUI == null)
        {
            displayUGUI = transform.Find("VideoDisplay").GetComponent<DisplayUGUI>();
            if (displayUGUI.CurrentMediaPlayer == null)
            {
                displayUGUI.CurrentMediaPlayer = mediaPlayer;
            }
        }
        //按需添加, 我的需求是設備是攝像機(播放視頻流)時,displayUGUI沒有點擊事件，設備告警(會有mp4視頻鏈接), displayUGUI有點擊事件(可以關閉,打開另一個視頻)
        //EventTriggerListener.Get(displayUGUI.gameObject).OnClick = (go) => CloseVideo();
    }
    
    /// <summary>
    /// 加載視頻第一秒圖片
    /// </summary>
    /// <param name="url"></param>
    /// <returns></returns>
    private IEnumerator LoadVideo(List<string> urls)
    {
        yield return null;  //下一幀開始處理

        Debug.Log("開始執(zhí)行...");

        if (urls.Count == 0) yield break;

        for (int i = 0; i < urls.Count; i++)
        {
            mediaPlayer.OpenMedia(new MediaPath(urls[i], MediaPathType.AbsolutePathOrURL), false);
            //等待0.3秒,按需調(diào)整等待時間
            Debug.Log("開始等待0.3秒, i = " + i);
            yield return new WaitForSeconds(0.5f);
            Debug.Log("結(jié)束等待0.3秒, i = " + i);
            //取第一秒的圖
            Texture2D texture2D = mediaPlayer.ExtractFrame(null, 1);
            if (texture2D == null)
            {
                Debug.LogWarning($"需要調(diào)整等待時間 i = {i} url = {urls[i]}");   //加載失敗
                continue;
            }
            //將視頻第一秒加載到圖片上
            GameObject video = Instantiate<GameObject>(VideoPlayerPre);
            video.SetActive(true);
            video.transform.SetParent(scrollRect.content);
            //需要用Image, 我嘗試使用RawImage無法顯示圖像
            video.GetComponent<Image>().sprite = Sprite.Create(texture2D, new Rect(0, 0, texture2D.width, texture2D.height), new Vector2(0.5f, 0.5f));
            video.GetComponent<VideoUrlInfo>().videoUrl = urls[i];   //將數(shù)據(jù)保存到VideoUrlInfo組件上
            //給圖片添加點擊事件,我這里的需求是點擊后才播放視頻
            EventTriggerListener.Get(video).OnClick = (go) => PlayVideo(go.GetComponent<VideoUrlInfo>().videoUrl);
            yield return null;
        }

        LoadFinish = true;
    }

所有代碼：

/* ======================================================================================
*      作 者：
*      主 題：
*      主要功能：

*      詳細描述：

*      創(chuàng)建時間：2022-11-11 19:52:34
*      修改記錄：
*      版 本：1.0
  =======================================================================================*/
using RenderHeads.Media.AVProVideo;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.Tracing;
using UnityEngine;
using UnityEngine.UI;

public class TestAVPro : MonoBehaviour
{
    [SerializeField] private MediaPlayer mediaPlayer;
    [SerializeField] private DisplayUGUI displayUGUI;           //顯示視頻

    [SerializeField] private ScrollRect scrollRect;             //滾動視圖

    //預制體
    [SerializeField] private GameObject VideoPlayerPre;         //視頻

    [SerializeField] private bool LoadFinish;                   //所有鏈接都加載完成的標記

    // Start is called before the first frame update
    void Start()
    {
        Init();
        //測試
        Test();
    }

    /// <summary>
    /// 加載視頻
    /// </summary>
    /// <param name="url"></param>
    /// <returns></returns>
    private IEnumerator LoadVideo(List<string> urls)
    {
        yield return null;  //下一幀開始處理

        Debug.Log("開始執(zhí)行...");

        if (urls.Count == 0) yield break;

        for (int i = 0; i < urls.Count; i++)
        {
            mediaPlayer.OpenMedia(new MediaPath(urls[i], MediaPathType.AbsolutePathOrURL), false);
            //等待0.3秒,按需調(diào)整等待時間
            Debug.Log("開始等待0.3秒, i = " + i);
            yield return new WaitForSeconds(0.5f);
            Debug.Log("結(jié)束等待0.3秒, i = " + i);
            //取第一秒的圖
            Texture2D texture2D = mediaPlayer.ExtractFrame(null, 1);
            if (texture2D == null)
            {
                Debug.LogWarning($"需要調(diào)整等待時間 i = {i} url = {urls[i]}");   //加載失敗
                continue;
            }
            //將視頻第一秒加載到圖片上
            GameObject video = Instantiate<GameObject>(VideoPlayerPre);
            video.SetActive(true);
            video.transform.SetParent(scrollRect.content);
            //需要用Image, 我嘗試使用RawImage無法顯示圖像
            video.GetComponent<Image>().sprite = Sprite.Create(texture2D, new Rect(0, 0, texture2D.width, texture2D.height), new Vector2(0.5f, 0.5f));
            video.GetComponent<VideoUrlInfo>().videoUrl = urls[i];   //將數(shù)據(jù)保存到VideoUrlInfo組件上
            //給圖片添加點擊事件,我這里的需求是點擊后才播放視頻
            EventTriggerListener.Get(video).OnClick = (go) => PlayVideo(go.GetComponent<VideoUrlInfo>().videoUrl);
            yield return null;
        }

        LoadFinish = true;
    }

    /// <summary>
    /// 圖片被點擊播放視頻(圖片是第一秒的視頻)
    /// </summary>
    /// <param name="url"></param>
    private void PlayVideo(string url)
    {
        if (!LoadFinish) return;
        if (url.IsNullOrEmpty()) return;

        displayUGUI.gameObject.SetActive(true);
        mediaPlayer.OpenMedia(new MediaPath(url, MediaPathType.AbsolutePathOrURL));
    }

    private void Init()
    {
        if (mediaPlayer == null)
        {
            mediaPlayer = transform.Find("MediaPlayer").GetComponent<MediaPlayer>();
        }
        mediaPlayer.Events.AddListener(OnMediaPlayerEvent); //事件監(jiān)聽

        if (displayUGUI == null)
        {
            displayUGUI = transform.Find("VideoDisplay").GetComponent<DisplayUGUI>();
            if (displayUGUI.CurrentMediaPlayer == null)
            {
                displayUGUI.CurrentMediaPlayer = mediaPlayer;
            }
        }
        //按需添加, 我的需求是設備是攝像機(播放視頻流)時,displayUGUI沒有點擊事件，設備告警(會有mp4視頻鏈接), displayUGUI有點擊事件(可以關閉,打開另一個視頻)
        EventTriggerListener.Get(displayUGUI.gameObject).OnClick = (go) => CloseVideo();

        if (scrollRect == null)
        {
            scrollRect = transform.Find("ScrollView").GetComponent<ScrollRect>();
        }

        if (VideoPlayerPre == null)
            this.VideoPlayerPre = transform.Find("VideoPlayerPre").gameObject;
        VideoPlayerPre.SetActive(false);    //不需要顯示
    }

    private void Test()
    {
        List<string> urls = new List<string>();
        //網(wǎng)上找的測試地址
        urls.Add("http://vfx.mtime.cn/Video/2019/02/04/mp4/190204084208765161.mp4");    //馴龍高手
        urls.Add("http://vfx.mtime.cn/Video/2019/03/21/mp4/190321153853126488.mp4");    //緊急救援
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319222227698228.mp4");    //玩具總動員
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319212559089721.mp4");    //葉問4 先行預告甄子丹過招美
        urls.Add("http://vfx.mtime.cn/Video/2019/03/18/mp4/190318231014076505.mp4");    //預告劉德華對決古天
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710171112971120.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710122716702150.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710095541348171.mp4");

        //壓測一下
        urls.Add("http://vfx.mtime.cn/Video/2019/02/04/mp4/190204084208765161.mp4");    //馴龍高手
        urls.Add("http://vfx.mtime.cn/Video/2019/03/21/mp4/190321153853126488.mp4");    //緊急救援
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319222227698228.mp4");    //玩具總動員
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319212559089721.mp4");    //葉問4 先行預告甄子丹過招美
        urls.Add("http://vfx.mtime.cn/Video/2019/03/18/mp4/190318231014076505.mp4");    //預告劉德華對決古天
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710171112971120.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710122716702150.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710095541348171.mp4");

        urls.Add("http://vfx.mtime.cn/Video/2019/02/04/mp4/190204084208765161.mp4");    //馴龍高手
        urls.Add("http://vfx.mtime.cn/Video/2019/03/21/mp4/190321153853126488.mp4");    //緊急救援
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319222227698228.mp4");    //玩具總動員
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319212559089721.mp4");    //葉問4 先行預告甄子丹過招美
        urls.Add("http://vfx.mtime.cn/Video/2019/03/18/mp4/190318231014076505.mp4");    //預告劉德華對決古天
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710171112971120.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710122716702150.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710095541348171.mp4");

        urls.Add("http://vfx.mtime.cn/Video/2019/02/04/mp4/190204084208765161.mp4");    //馴龍高手
        urls.Add("http://vfx.mtime.cn/Video/2019/03/21/mp4/190321153853126488.mp4");    //緊急救援
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319222227698228.mp4");    //玩具總動員
        urls.Add("http://vfx.mtime.cn/Video/2019/03/19/mp4/190319212559089721.mp4");    //葉問4 先行預告甄子丹過招美
        urls.Add("http://vfx.mtime.cn/Video/2019/03/18/mp4/190318231014076505.mp4");    //預告劉德華對決古天
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710171112971120.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710122716702150.mp4");
        urls.Add("http://vfx.mtime.cn/Video/2021/07/10/mp4/210710095541348171.mp4");

        StartCoroutine(LoadVideo(urls));
    }

    private void OnMediaPlayerEvent(MediaPlayer arg0, MediaPlayerEvent.EventType arg1, ErrorCode arg2)
    {
        switch (arg1)
        {
            case MediaPlayerEvent.EventType.Started:    //開始播放的事件
                //videoLoad = true;       //已經(jīng)加載完成
                //quanImage.Deactivate(); //隱藏
                break;
        }

        switch (arg2)
        {
            case ErrorCode.LoadFailed:
                //videoTip.text = "加載出錯,網(wǎng)絡連接不穩(wěn)定, 請稍后重試!!!";
                //videoTip.Activate();     //顯示
                //videoLoad = true;       //加載出錯
                //quanImage.Deactivate();  //隱藏
                break;
            case ErrorCode.DecodeFailed:
                break;
        }
    }

    /// <summary>
    /// 關閉視頻 displayUGUI的點擊事件
    /// </summary>
    private void CloseVideo()
    {
        displayUGUI.gameObject.SetActive(false);
        mediaPlayer.Stop();
    }
}

UI
1.創(chuàng)建一個空對象并添加TestAVPro(自己寫的腳本)

2.創(chuàng)建Scroll View

3.給Scroll View 的Content添加Grid Layout Group 和 Content Size Fitter組件，按需調(diào)整里面參數(shù)

4創(chuàng)建MediaPlayer和displayUGUI組件

5.關閉自動播放和自動打開6.需要改名稱和腳本中對應(按照自己的來改)

7.一個工具類型,給UI添加點擊事件

using UnityEngine;
using UnityEngine.EventSystems;

/// <summary>
/// UI添加點擊事件
/// </summary>
public class EventTriggerListener : EventTrigger
{
    public delegate void voidDelegate(GameObject obj);
    public voidDelegate OnBtnDown;
    public voidDelegate OnBtnUp;
    public voidDelegate OnEnter;
    public voidDelegate OnExit;
    public voidDelegate OnStay;
    public voidDelegate OnClick;
    public voidDelegate OnDoubleClick;
    private bool isEnter = false;
    public void Update()
    {
        if (isEnter)
        {
            if (OnStay != null)
            {
                OnStay(gameObject);
            }
        }
    }
    public static EventTriggerListener Get(GameObject obj)
    {
        EventTriggerListener eventTriggerListener = obj.GetComponent<EventTriggerListener>();
        if (eventTriggerListener == null)
        {
            eventTriggerListener = obj.AddComponent<EventTriggerListener>();
        }
        return eventTriggerListener;
    }
    /// <summary>
    /// 判斷是否是第二次點擊
    /// </summary>
    private bool isTwo = true;
    private bool isOver = true;
    public override void OnPointerDown(PointerEventData eventData)
    {
        if (OnBtnDown != null)
        {
            OnBtnDown(gameObject);
        }
        isTwo = !isTwo;
        if (!isOver)
        {
            return;
        }
        isOver = false;
        Invoke("SelectClick", 0.3f);
    }

    public void SelectClick()
    {
        if (isTwo)
        {
            if (OnDoubleClick != null)
            {
                OnDoubleClick(gameObject);
            }
        }
        else
        {
            if (OnClick != null)
            {
                OnClick(gameObject);
            }
        }
        isTwo = true;
        isOver = true;
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        if (OnBtnUp != null)
        {
            OnBtnUp(gameObject);
        }
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        if (OnEnter != null)
        {
            OnEnter(gameObject);
        }
        isEnter = true;
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        if (OnExit != null)
        {
            OnExit(gameObject);
        }
        isEnter = false;
    }
}

工程地址
提取碼：o93j

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