我正在尝试使用dash.js播放dash mpd文件。我使用axinom tutorial作为指导，建议使用以下命令生成mpd文件。
mkdir dash_unprotected
MP4Box -dash 4000 -rap -frag-rap -sample-groups-traf -profile dashavc264:live
-bs-switching no -segment-name dash_$RepresentationID$_$Number$ -url-template
video-700k.mp4 video-1000k.mp4 video-1500k.mp4 video-2000k.mp4 audio.mp4 -out
"dash_unprotected/manifest.mpd"
生成的mpd文件
<?xml version="1.0"?>
<!-- MPD file Generated with GPAC version 0.5.1-DEV-rev5619 on 2017-06-29T06:08:26Z-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.500000S" type="static" mediaPresentationDuration="PT0H1M55.01S" profiles="urn:mpeg:dash:profile:isoff-live:2011, http://dashif.org/guildelines/dash264">
<ProgramInformation moreInformationURL="http://gpac.sourceforge.net">
<Title>dash_unprotected/manifest.mpd generated by GPAC</Title>
</ProgramInformation>
<Period duration="PT0H1M55.01S">
<AdaptationSet segmentAlignment="true" maxWidth="316" maxHeight="576" maxFrameRate="30" par="316:576" lang="und">
<SegmentTemplate timescale="15360" media="dash_dash_unprotected$$Number$.m4s" startNumber="1" duration="49009" initialization="dash_dash_unprotected$init.mp4"/>
<Representation id="1" mimeType="video/mp4" codecs="avc1.64002a" width="158" height="288" frameRate="30" sar="396:395" startWithSAP="1" bandwidth="699969">
</Representation>
<Representation id="2" mimeType="video/mp4" codecs="avc1.64002a" width="198" height="360" frameRate="30" sar="1:1" startWithSAP="1" bandwidth="996926">
</Representation>
<Representation id="3" mimeType="video/mp4" codecs="avc1.64002a" width="264" height="480" frameRate="30" sar="1:1" startWithSAP="1" bandwidth="1496279">
</Representation>
<Representation id="4" mimeType="video/mp4" codecs="avc1.64002a" width="316" height="576" frameRate="30" sar="396:395" startWithSAP="1" bandwidth="1993448">
</Representation>
</AdaptationSet>
<AdaptationSet segmentAlignment="true" lang="und">
<SegmentTemplate timescale="44100" media="dash_dash_unprotected$$Number$.m4s" startNumber="1" duration="174856" initialization="dash_dash_unprotected$init.mp4"/>
<Representation id="5" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="97798">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
</Representation>
</AdaptationSet>
</Period>
</MPD>
然后，我尝试使用下面的JavaScript代码在dash.js中播放
var url = "drm/dash_unprotected/manifest.mpd";
var player = dashjs.MediaPlayer().create();
$(function() {
player.initialize(document.querySelector("#videoPlayer"),null, true);
player.attachVideoContainer(document.getElementById("videoContainer"));
$('#playButton').click(function() {
player.attachSource(url);
});
});
但是dash.js抛出错误
[42585] Video Element Error: MEDIA_ERR_SRC_NOT_SUPPORTED (CHUNK_DEMUXER_ERROR_APPEND_FAILED: audio object type 0x40 does not match what is specified in the mimetype.)
dash.all.debug.js:14793 [42586] [object MediaError]
dash.all.debug.js:14793 [42588] Schedule controller stopping for video
dash.all.debug.js:14793 [42589] Schedule controller stopping for audio
dash.all.debug.js:14793 [42591] Caught pending play exception - continuing (NotSupportedError: Failed to load because no supported source was found.)
我该如何解决这个错误？我是dash.js和mpeg-dash员工的新手
最佳答案
我可以通过删除-segment-name选项及其值来解决该错误。所以我的命令看起来像这样
mkdir dash_unprotected
MP4Box -dash 4000 -rap -frag-rap -sample-groups-traf -profile dashavc264:live
-bs-switching no -url-template
video-700k.mp4 video-1000k.mp4 video-1500k.mp4 video-2000k.mp4 audio.mp4 -out
"dash_unprotected/manifest.mpd"
-segment-name选项使我的段彼此覆盖。例如，视频片段将被音频片段覆盖。发生覆盖是因为即使我对
-segment-name选项使用唯一值时，视频和音频段也被赋予了相同的名称。-segment-name $RepresentationID$$或-segment-name $Time$$消除此选项，使MP4Box对
%s_dash使用默认值-segment-name。因此，音频片段将这样命名 audio_dash1.m4s
和这样的视频片段
`video_dash1.m4s`
关于javascript - 视频元素错误:MEDIA_ERR_SRC_NOT_SUPPORTED，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44818976/