从网络视频网址获取缩略图

Question

我在这个应用程序中开发新闻应用程序在recyclerview中显示视频。所以我想显示视频第一帧（缩略图）图像，这样我就可以在recyclerview中将该图像设置为imageview。

我使用 FFmpegMediaMetadataRetriever ，但我的recyclerview卡住了一段时间然后显示视频缩略图。

还有其他解决办法吗？

这是我的代码

Const StepSize As Integer = 1  '-- increase or decrease this to move the block fast or slow.
Private Random As New Random

Public BulletMovement As System.Drawing.Point
Public bullet_case

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Asteroid1Movement.Interval = 1
    Asteroid1Movement.Enabled = True
End Sub

Private Sub Asteroid1Movement_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Asteroid1Movement.Tick
    Dim direction As Integer = Random.Next(0, 4)

    Select Case direction
        Case 0 'Upwards
            Asteroid1.Top -= StepSize
            If Asteroid1.Top < 0 Then Asteroid1.Top = 0
        Case 1 'Downwards
            Asteroid1.Top += StepSize
            If Asteroid1.Top > Me.Height - Asteroid1.Height Then Asteroid1.Top = Me.Height - Asteroid1.Height
        Case 2 'Left
            Asteroid1.Left -= StepSize
            If Asteroid1.Left < 0 Then Asteroid1.Left = 0
        Case 3 'Right
            Asteroid1.Left += StepSize
            If Asteroid1.Left > Me.Width - Asteroid1.Width Then Asteroid1.Left = Me.Width - Asteroid1.Width
    End Select
End Sub