Question

我正在尝试使用RTMP协议在应用中流式传输相机。从一周开始，我正在调试ExoPlayer和Librtmp客户端，但不知何故，Librtmp客户端无法建立连接并触发RtmpIOException，内部出现ECONNREFUSED错误。试过Socket编程但得到了同样的错误。 IP ping工作正常。我的同事最近就Librtmp GitHub回购提出了一个问题。自1月份以来，Devs没有回复。

我们尝试过其他lib，例如IJKPlayer（内部使用FFmpeg），它能够预览流，但它在流预览之前有更多的延迟，而且还有摄像头wifi断开问题。由于使用JNI构建，因此无法进一步调试内部。

代码：

private val bandwidthMeater = DefaultBandwidthMeter()
private val adaptiveTrackSelectionFactory = AdaptiveTrackSelection.Factory(bandwidthMeater)
private val trackSelector = DefaultTrackSelector(adaptiveTrackSelectionFactory)

private val player = ExoPlayerFactory.newSimpleInstance(context, trackSelector)

fun init() {
    player.setVideoSurface(holder.surface)
}

fun startStream(streamUrl: String, startListener: () -> Unit) {
    //e.g. streamUrl = rtmp://192.168.42.5:1936/live/myStream (IP is Android device IP provide by camera when connected to its wifi)
    val rtmpDatasourceFactory = RtmpDatasource.RtmpDataSourceFactory()
    val factory = ExtractorMediaSource.Factory(rtmpDatasourceFactory)
    val extractorMediaSource =factory.createMediaSource(Uri.parse(streamUrl))   

    player.prepare(extractorMediaSource)
    player.playWhenReady = true
}

ExoPlayer错误：

E/ExoPlayerImplInternal: Source error.
       net.butterflytv.rtmp_client.RtmpClient$RtmpIOException
           at net.butterflytv.rtmp_client.RtmpClient.open(RtmpClient.java:56)
           at com.google.android.exoplayer2.ext.rtmp.RtmpDataSource.open(RtmpDataSource.java:57)
           at com.google.android.exoplayer2.source.ExtractorMediaPeriod$ExtractingLoadable.load(ExtractorMediaPeriod.java:841)
           at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:308)
           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
           at java.lang.Thread.run(Thread.java:818)

连接错误：

java.net.ConnectException: failed to connect to /192.168.42.5 (port 1936): connect failed: ECONNREFUSED (Connection refused)

Answer 1

您是否在运行时请求许可？

每次遇到这种类型的错误，这就是我忘记做的事情。

https://developer.android.com/training/permissions/requesting#java

ExoPlayer无法与摄像机IP地址建立连接

1 个答案: