Exoplayer for android，尝试流式传输 m3u8 文件并收到错误：所有可用的提取器都无法读取流

Question

我正在尝试流式传输 m3u8 文件，但出现错误。我使用的网址如下：http : //storage.googleapis.com/videos.siku.org/10005/dash/master.m3u8 这个流媒体视频在浏览器中可以正常工作。我在运行时收到以下错误：

ExoPlayerImplInternal：源错误。com.google.android.exoplayer2.source.UnrecognizedInputFormatException: 没有可用的提取器 (MatroskaExtractor, FragmentedMp4Extractor, Mp4Extractor, Mp3Extractor, AdtsExtractor, Ac3Extractor, TsExtractor, FlvExtractor, OggExtractor, PsavrExtractor, WlacExtractor, PsavrExtractor, PsavrExtractor . 在 com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractorHolder.selectExtractor(ProgressiveMediaPeriod.java:1090) 在 com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:969) 在 com。 .android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:391) 在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 在 java.util。

我正在使用ExoPlayerHelper类（它取自 stackoverflow 问题，虽然我确实按照推荐的方式实现了这个，但我遇到了同样的错误）

这是我正在使用的课程：

class ExoPlayerHelper(
    private val playerView: PlayerView,
    onError: (ExoPlaybackException) -> Unit,
    onPlayerBuffer: (Boolean) -> Unit
) {
    private var exoPlayer: ExoPlayer? = null
    private var mediaSource: ProgressiveMediaSource? = null
    private val playerListener = object : Player.EventListener {
        override fun onPlayerError(error: ExoPlaybackException) {
            super.onPlayerError(error)
            onError(error)
        }

        override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
            super.onPlayerStateChanged(playWhenReady, playbackState)
            onPlayerBuffer(playbackState == Player.STATE_BUFFERING)
        }
    }

    fun initializePlayer(url: String) {
        exoPlayer = SimpleExoPlayer.Builder(playerView.context).build()
        exoPlayer!!.repeatMode = Player.REPEAT_MODE_ALL
        exoPlayer!!.addListener(playerListener)
        playerView.player = exoPlayer

        val userAgent =
            Util.getUserAgent(playerView.context, playerView.context.getString(R.string.app_name))
        mediaSource = ProgressiveMediaSource
            .Factory(
                DefaultDataSourceFactory(playerView.context, userAgent),
                DefaultExtractorsFactory()
            )
            .createMediaSource(Uri.parse(url))
            exoPlayer!!.prepare(mediaSource!!, true, false)
            exoPlayer!!.playWhenReady = true
        }
    }
}

我确实得到了一个空白的 com.google.android.exoplayer2.ui.PlayerView，其中出现了控件。按播放按钮时，我收到相同的错误消息：

com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.source.UnrecognizedInputFormatException: 没有可用的提取器 (MatroskaExtractor, FragmentedMp4Extractor, Mp4Extractor, Mp3Extractor, AdtsExtractor, Ac3Extractor, FvggExtractor, FvggExtractor, TlvgExtractor AmrExtractor、Ac4Extractor、FlacExtractor）可以读取流。

关于为什么我收到此错误 UnrecognizedInputFormatException 的任何线索？

Answer 1

Since you are trying to play m3u8 file, you need to create HLS media source. So just make this below change -

mediaSource =HlsMediaSource.Factory(DefaultHttpDataSourceFactory(userAgent))
                .createMediaSource(uri)