如何在Exoplayer中播放没有音频的rtmp流？

Question

我正在将Exoplayer集成到我的应用程序中，当我尝试播放没有音频的视频时，我遇到了问题，但是无法正常播放，但是如果启用音频，它将正确播放视频，我的代码：

  player = ExoPlayerFactory.newSimpleInstance(this, trackSelector)

        val playerView = findViewById<PlayerView>(R.id.simple_player)

        playerView.player = player




        val rtmpDataSourceFactory = RtmpDataSourceFactory()



        val url = mVideoPath
         val videoSource = ExtractorMediaSource.Factory(rtmpDataSourceFactory)
            .createMediaSource(Uri.parse(url))

         player.prepare(videoSource)

         player.playWhenReady = true