PushVideoFrame函数塞入的同步时间搓timestamp在远端无法获取

Unity开发中,我使用了PushVideoFrame来传输实时音视频数据,并且,我设置了ExternalVideoFrame的结构体参数:
ExternalVideoFrame extVidFrame;

        extVidFrame.type = ExternalVideoFrame.VIDEO_BUFFER_TYPE.VIDEO_BUFFER_RAW_DATA;
        extVidFrame.format = ExternalVideoFrame.VIDEO_PIXEL_FORMAT.VIDEO_PIXEL_BGRA;
        extVidFrame.buffer = texture2d.GetRawTextureData();
        extVidFrame.stride = texture2d.width;
        extVidFrame.height = texture2d.height;
        extVidFrame.cropLeft = 0;

        extVidFrame.cropTop = 0;
        extVidFrame.cropRight = 0;
        extVidFrame.cropBottom = 0;
        extVidFrame.rotation = 0;
        long epoch = DateTimeOffset.Now.ToUnixTimeMilliseconds();
        extVidFrame.timestamp = epoch;
        int isPush = engine.PushVideoFrame(extVidFrame);
        if (isPush != 0)
        {
            Debug.Log("Can't not Push Videos!");
        }

但是,我所设置的timestamp 不知道在对端如何获取,能否提供一下,获取这个timestamp的方法?

目前应该是没有方法获取的。你需要获取 timestamp 来做什么呢?

那请问一下塞入的这个是不是没有用?
另外
VideoRawDataManager videomanger =VideoRawDataManager)mRtcEngine.GetVideoRawDataManager();
videomanger.SetOnRenderVideoFrameCallback(onRender);
这个SetOnRenderVideoFrameCallback中videoFrame的 videoFrame.renderTimeMs获得的是谁的时间戳?我想用来这个时间戳来做其它数据通道的同步