平台：Unity

问题描述：由于硬件问题，无法获取到Android相机，因此使用自采集方案，获取到相机视频流主动推送，出现两个问题

1. 相机返回的是yuv i420格式的数据，测试使用了官方提供的RenderWithYUV的demo场景作为接收端，发现是绿屏，不知道这种情况是否需要自己去做转码工作，下面是发送端接收相机数据处理部分的代码

   NativeArray<byte> data = new NativeArray<byte>(imagedata, Allocator.Temp);
        if (_shareData?.Length != data.Length)
        {
            _shareData = new byte[data.Length];
        }

        ExternalVideoFrame externalVideoFrame = new ExternalVideoFrame();
        externalVideoFrame.type = VIDEO_BUFFER_TYPE.VIDEO_BUFFER_RAW_DATA;
        externalVideoFrame.format = VIDEO_PIXEL_FORMAT.VIDEO_PIXEL_I420;
        externalVideoFrame.buffer = _shareData;
        externalVideoFrame.stride = width;
        externalVideoFrame.height = height;
        externalVideoFrame.cropLeft = 10;
        externalVideoFrame.cropTop = 10;
        externalVideoFrame.cropRight = 10;
        externalVideoFrame.cropBottom = 10;
        externalVideoFrame.rotation = 180;
        externalVideoFrame.timestamp = System.DateTime.Now.Ticks / 10000;
        var ret = RtcEngine.PushVideoFrame(externalVideoFrame, videoTrack);
        Debug.Log("PushVideoFrame ret = " + ret + "time: " + System.DateTime.Now.Millisecond)

2.选用自采集推流的方式后，如何能让本地视频渲染去渲染主动推的视频流而不是SDK去获取相机的视频流呢？

刚入手，还不熟悉，如有描述不清的地方敬请提出，我会尽量提供信息