android - ExoPlayer 播放错误

Question

07-03 18:51:01.600  16188-16266/? E/ExoPlayerImplInternal﹕ Internal runtime error.
    java.lang.IllegalArgumentException
            at com.google.android.exoplayer.util.Assertions.checkArgument(Assertions.java:39)
            at com.google.android.exoplayer.upstream.DataSpec.<init>(DataSpec.java:101)
            at com.google.android.exoplayer.upstream.DataSpec.<init>(DataSpec.java:71)
            at com.google.android.exoplayer.dash.DashMp4ChunkSource.newInitializationChunk(DashMp4ChunkSource.java:197)
            at com.google.android.exoplayer.dash.DashMp4ChunkSource.getChunkOperation(DashMp4ChunkSource.java:164)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.updateLoadControl(ChunkSampleSource.java:500)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.restartFrom(ChunkSampleSource.java:454)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.enable(ChunkSampleSource.java:226)
            at com.google.android.exoplayer.MediaCodecTrackRenderer.onEnabled(MediaCodecTrackRenderer.java:198)
            at com.google.android.exoplayer.MediaCodecVideoTrackRenderer.onEnabled(MediaCodecVideoTrackRenderer.java:222)
            at com.google.android.exoplayer.TrackRenderer.enable(TrackRenderer.java:148)
            at com.google.android.exoplayer.ExoPlayerImplInternal.incrementalPrepareInternal(ExoPlayerImplInternal.java:286)
            at com.google.android.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:195)
            at android.os.Handler.dispatchMessage(Handler.java:98)
            at android.os.Looper.loop(Looper.java:157)
            at android.os.HandlerThread.run(HandlerThread.java:61)
            at com.google.android.exoplayer.ExoPlayerImplInternal$1.run(ExoPlayerImplInternal.java:109)
07-03 18:51:01.610   1049-18543/? D/KeyguardViewMediator﹕ setHidden false
07-03 18:51:01.610   1049-18543/? D/KeyguardUpdateMonitor﹕ sendKeyguardVisibilityChanged(true)
07-03 18:51:01.610    1049-1049/? D/KeyguardUpdateMonitor﹕ handleKeyguardVisibilityChanged(1)
07-03 18:51:01.610   1049-19547/? D/KeyguardViewMediator﹕ setHidden false
07-03 18:51:01.610   1049-19547/? D/KeyguardUpdateMonitor﹕ sendKeyguardVisibilityChanged(true)
07-03 18:51:01.610    1049-1049/? D/KeyguardUpdateMonitor﹕ handleKeyguardVisibilityChanged(1)
07-03 18:51:01.610    831-16270/? W/ContextImpl﹕ Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1454 com.android.server.InputMethodManagerService$4.run:2723 java.lang.Thread.run:841 <bottom of call stack> <bottom of call stack>
07-03 18:51:01.630  16188-16188/? E/PlayerActivity﹕ Playback failed
    com.google.android.exoplayer.ExoPlaybackException: java.lang.IllegalArgumentException
            at com.google.android.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:236)
            at android.os.Handler.dispatchMessage(Handler.java:98)
            at android.os.Looper.loop(Looper.java:157)
            at android.os.HandlerThread.run(HandlerThread.java:61)
            at com.google.android.exoplayer.ExoPlayerImplInternal$1.run(ExoPlayerImplInternal.java:109)
     Caused by: java.lang.IllegalArgumentException
            at com.google.android.exoplayer.util.Assertions.checkArgument(Assertions.java:39)
            at com.google.android.exoplayer.upstream.DataSpec.<init>(DataSpec.java:101)
            at com.google.android.exoplayer.upstream.DataSpec.<init>(DataSpec.java:71)
            at com.google.android.exoplayer.dash.DashMp4ChunkSource.newInitializationChunk(DashMp4ChunkSource.java:197)
            at com.google.android.exoplayer.dash.DashMp4ChunkSource.getChunkOperation(DashMp4ChunkSource.java:164)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.updateLoadControl(ChunkSampleSource.java:500)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.restartFrom(ChunkSampleSource.java:454)
            at com.google.android.exoplayer.chunk.ChunkSampleSource.enable(ChunkSampleSource.java:226)
            at com.google.android.exoplayer.MediaCodecTrackRenderer.onEnabled(MediaCodecTrackRenderer.java:198)
            at com.google.android.exoplayer.MediaCodecVideoTrackRenderer.onEnabled(MediaCodecVideoTrackRenderer.java:222)
            at com.google.android.exoplayer.TrackRenderer.enable(TrackRenderer.java:148)
            at com.google.android.exoplayer.ExoPlayerImplInternal.incrementalPrepareInternal(ExoPlayerImplInternal.java:286)
            at com.google.android.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:195)
            at android.os.Handler.dispatchMessage(Handler.java:98)
            at android.os.Looper.loop(Looper.java:157)
            at android.os.HandlerThread.run(HandlerThread.java:61)
            at com.google.android.exoplayer.ExoPlayerImplInternal$1.run(ExoPlayerImplInternal.java:109)

mpd:

<?xml version="1.0" encoding="UTF-8"?>
<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="urn:mpeg:dash:schema:mpd:2011"
  xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd"
  type="static"
  mediaPresentationDuration="PT654S"
  minBufferTime="PT2S"
  profiles="urn:mpeg:dash:profile:isoff-on-demand:2011">

  <BaseURL>http://dash.edgesuite.net/dash264/TestCases/1a/netflix/</BaseURL>
  <Period>
    <!-- English Audio -->
    <AdaptationSet mimeType="audio/mp4" codecs="mp4a.40.5" lang="en" subsegmentAlignment="true" subsegmentStartsWithSAP="1">
      <Representation id="1" bandwidth="64000">
        <BaseURL>ElephantsDream_AAC48K_064.mp4.dash</BaseURL>
      </Representation>
    </AdaptationSet>
    <!-- Video -->
    <AdaptationSet mimeType="video/mp4" codecs="avc1.42401E" subsegmentAlignment="true" subsegmentStartsWithSAP="1">
      <Representation id="2" bandwidth="100000" width="480" height="360">
        <BaseURL>ElephantsDream_H264BPL30_0100.264.dash</BaseURL>
      </Representation>
      <Representation id="3" bandwidth="175000" width="480" height="360">
        <BaseURL>ElephantsDream_H264BPL30_0175.264.dash</BaseURL>
      </Representation>
      <Representation id="4" bandwidth="250000" width="480" height="360">
        <BaseURL>ElephantsDream_H264BPL30_0250.264.dash</BaseURL>
      </Representation>
      <Representation id="5" bandwidth="500000" width="480" height="360">
        <BaseURL>ElephantsDream_H264BPL30_0500.264.dash</BaseURL>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>

修改 samples.java从 :

new Sample("test 2", "",
             "http://dash.edgesuite.net/dash264/TestCases/1a/netflix/exMPD_BIP_TC1.mpd",
             DemoUtil.TYPE_DASH_VOD, false, false),

Answer 1

ExoPlayer 不喜欢 MPD。它实际上属于:

https://github.com/google/ExoPlayer/issues/2

虽然我真的不认为我们真的想要处理这种 MPD。 MPD 不提供有关每个流的初始化和索引数据在哪里的任何指示。除非我遗漏了什么，否则这意味着播放器必须向每个 URL 发出无限范围请求并读取直到找到它们。这确实不理想，IMO MPD 应该被固定为以一种或另一种方式包含这些信息。