[游戏开发]VideoPlayer取某一帧图片

1、videoplayer的RenderMode设置为APIOnly（这种模式不会生成视频视图，但是可以获取到数据）

2、设置videoplayer的URL或者videoclip

3、调用videoplayer.Prepare()

4、监听videoplayer.prepareCompleted（用isPrepared也可以）

5、在准备完成后调用videoplayer.Pause()，此时视频数据所处第0帧，可以在这里修改目标帧数，并取到对应位置的图片

小demo:

    void Start()
    {
        _videoPlayer.source = VideoSource.Url;
        _videoPlayer.renderMode = VideoRenderMode.APIOnly;
        _videoPlayer.playOnAwake = false;
    }

    public void TakeFrameTexture(string path,float percent,Action<Texture> onFinish)
    {
        _videoPlayer.url = path;
        _videoPlayer.Prepare();
        _videoPlayer.prepareCompleted += source =>
        {
            _videoPlayer.Pause();

            long targetFrame = (long)(_videoPlayer.frame * percent);
            
            _videoPlayer.frame = targetFrame;
            Texture tex = null;
            //按着_videoPlayer.texture的数据写一张Texture
            onFinish.Invoke(tex);
        };
    }

参考：Video - how to extract frames from a video - Unity Forum