Question

我正在通过MP4Box为我的Exoplayer实例提供一些MPD。

这些都只是音频。

每个MPD都有三个表示

播放对于较短的音频剪辑很好，但是当我尝试传输其中一个较大的剪辑时，exoplayer会出现404错误

com.google.android.exoplayer.upstream.HttpDataSource $ InvalidResponseCodeException：响应代码：404

有什么特别可能导致这种情况吗？或者我可以提供的更多信息将有助于解决这个问题？

全部谢谢！

这里的另一个例子是一个工作正常的mpd

<!--
 MPD file Generated with GPAC version 0.5.2-DEV-rev537-gb163c01-master  at 2015-08-16T12:39:38.335Z
-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.500S" type="static" mediaPresentationDuration="PT0H0M7.895S" maxSegmentDuration="PT0H0M1.996S" profiles="urn:mpeg:dash:profile:full:2011">
<ProgramInformation moreInformationURL="http://gpac.sourceforge.net">
<Title>IntroE.mpd generated by GPAC</Title>
</ProgramInformation>
<Period duration="PT0H0M7.895S">
<AdaptationSet segmentAlignment="true" bitstreamSwitching="true" lang="und">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<SegmentList>
<Initialization sourceURL="IntroE_init.mp4"/>
</SegmentList>
<Representation id="1" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="62781">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_Introduction_English_FirstRender_641.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_642.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_643.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_644.m4s"/>
</SegmentList>
</Representation>
<Representation id="2" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="105903">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_Introduction_English_FirstRender_1281.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_1282.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_1283.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_1284.m4s"/>
</SegmentList>
</Representation>
<Representation id="3" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="240968">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_Introduction_English_FirstRender_2561.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_2562.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_2563.m4s"/>
<SegmentURL media="seg_Introduction_English_FirstRender_2564.m4s"/>
</SegmentList>
</Representation>
</AdaptationSet>
</Period>
</MPD>

这是一个不起作用并导致404错误

的错误

<!--
 MPD file Generated with GPAC version 0.5.2-DEV-rev537-gb163c01-master  at 2015-08-16T12:48:11.434Z
-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.500S" type="static" mediaPresentationDuration="PT0H0M51.827S" maxSegmentDuration="PT0H0M1.996S" profiles="urn:mpeg:dash:profile:full:2011">
<ProgramInformation moreInformationURL="http://gpac.sourceforge.net">
<Title>ChartE.mpd generated by GPAC</Title>
</ProgramInformation>
<Period duration="PT0H0M51.827S">
<AdaptationSet segmentAlignment="true" bitstreamSwitching="true" lang="und">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<SegmentList>
<Initialization sourceURL="ChartE_init.mp4"/>
</SegmentList>
<Representation id="1" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="63987">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_The Charterhouse_English_FirstRender_641.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_642.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_643.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_644.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_645.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_646.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_647.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_648.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_649.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6410.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6411.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6412.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6413.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6414.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6415.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6416.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6417.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6418.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6419.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6420.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6421.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6422.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6423.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6424.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6425.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_6426.m4s"/>
</SegmentList>
</Representation>
<Representation id="2" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="106585">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1281.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1282.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1283.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1284.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1285.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1286.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1287.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1288.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_1289.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12810.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12811.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12812.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12813.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12814.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12815.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12816.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12817.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12818.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12819.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12820.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12821.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12822.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12823.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12824.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12825.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_12826.m4s"/>
</SegmentList>
</Representation>
<Representation id="3" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="248262">
<SegmentList timescale="44100" duration="88023">
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2561.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2562.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2563.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2564.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2565.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2566.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2567.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2568.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_2569.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25610.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25611.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25612.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25613.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25614.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25615.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25616.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25617.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25618.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25619.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25620.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25621.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25622.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25623.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25624.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25625.m4s"/>
<SegmentURL media="seg_The Charterhouse_English_FirstRender_25626.m4s"/>
</SegmentList>
</Representation>
</AdaptationSet>
</Period>
</MPD>

我遇到的问题可能是因为我有apache2设置吗？一切都应该有很好的权限，但是我的配置可能需要考虑其他的东西吗？

Answer 1

通常404是因为客户端和服务器的UTC时间不匹配。但是，你的MPD是静态的，所以这应该不是问题。细分应该始终可用。我建议您尝试使用其他播放器（MP4Client或DASH.js）播放内容，以检查问题是来自播放器还是来自服务器。

Exoplayer没有播放更大的文件，MPD，DASH

1 个答案: