无法在浏览器上播放Dash Stream

时间：2018-02-08 02:57:40

标签： nginx mpeg-dash mp4box dash.js

我有一个nginx服务器，我在其中安装了nginx-rtmp-module，我想公开视频流throw rtmp和mpeg-dash协议。 rtmp端点工作正常，但mpeg-dash端点没有。

我得到的问题是当我用dash.js播放视频时我用MP4Box生成了一个带有这行的mdp文件

 sudo MP4Box -dash 10000 -frag 10000 -profile dashavc264:on-demand -rap -out bbb.mpd bbb.mp4

但是当我尝试在任何浏览器上播放视频时，我会不断收到此日志

日志 

 Debug.js:130 [14] Playback Initialized 
 Debug.js:130 [15] [dash.js 2.6.5] MediaPlayer has been initialized 
 Debug.js:130 [15] Converted video element to dash.js player and added 
 content: http://xxx.xxx.xxxx.xxxx/doc/bbb.mpd  
 Debug.js:130 [35] Parsing complete: ( xml2json: 9.57ms, objectiron: 4.06ms, total: 0.0136s) 
 Debug.js:130 [43] MediaSource attached to element.  Waiting on open... 
 Debug.js:130 [44] Manifest has been refreshed at Wed Feb 07 2018 15:00:37 GMT-0600 (Hora estándar, América Central)[1518037237.401]  
 Debug.js:130 [47] MediaSource is open! 
 Debug.js:130 [47] Duration successfully set to: 596.48 
 Debug.js:130 [48] Added 0 inline events 
 Debug.js:130 [49] No video data. 
 Debug.js:130 [49] No audio data. 
 Debug.js:130 [49] No text data. 
 Debug.js:130 [50] No fragmentedText data. 
 Debug.js:130 [51] No embeddedText data. 
 Debug.js:130 [52] Multiplexed representations are intentionally not supported, as they are not compliant with the DASH-AVC/264 guidelines 
 Debug.js:130 [52] No image data. 
 Debug.js:130 [53] No streams to play.

mp4文件与mpd文件位于同一路径，MP4Box也生成了一个dashinit.mp4文件。

mdp文件 

 <?xml version="1.0"?>
 <!-- MPD file Generated with GPAC version 0.7.2-DEV-revUNKNOWN_REV  at 2018-02-07T18:37:55.769Z-->
 <MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.500S" type="static" mediaPresentationDuration="PT0H9M56.459S" maxSegmentDuration="PT0H0M6.000S" profiles="urn:mpeg:dash:profile:full:2011">
 <ProgramInformation moreInformationURL="http://gpac.io">
     <Title>bbb.mpd generated by GPAC</Title>
     </ProgramInformation>

 <Period duration="PT0H9M56.459S">
 <AdaptationSet segmentAlignment="true" maxWidth="854" maxHeight="480" maxFrameRate="24" par="854:480" lang="und">
 <Representation id="1" mimeType="video/mp4" codecs="mp4v.20.1" width="854" height="480" frameRate="24" sar="1:1" startWithSAP="1" bandwidth="252026">
 <BaseURL>bbb_out_dashinit.mp4</BaseURL>
 <SegmentList timescale="12288" duration="49152">
     <Initialization range="0-947"/>
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   </SegmentList>
 </Representation>
</AdaptationSet>
</Period>
</MPD>

1 个答案:

答案 0 :(得分：0)

您的输入文件使用的视频编解码器（mp4v.20.1）似乎不受网络浏览器的支持，这可能是播放问题的一部分。

因此，您必须首先使用支持的编解码器对输入文件进行编码，例如： H264 / AVC，它应该按预期工作。这个tutorial逐步解释了如何使用MP4Box正确创建分段内容

仅供参考：为了检查，如果浏览器支持特定的编解码器/配置文件/级别，您可以对其进行测试here。只需复制并粘贴编解码器字符串，然后点击＆＃34;测试！＆＃34;按钮。

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