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我遵循此demo它使用mediaSource API和MPEG DASH標準播放.webm視頻。 這是所使用的MPD文件:如何創建MPEG-DASH的MPD文件來播放webm視頻?
<?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"
type="static"
mediaPresentationDuration="PT888.05S"
minBufferTime="PT1S"
profiles="urn:webm:dash:profile:webm-on-demand:2012">
<Period id="0" start="PT0S" duration="PT888.05S" >
<AdaptationSet id="0" mimeType="video/webm" codecs="vp8" lang="eng" width="720" height="306" subsegmentAlignment="true" subsegmentStartsWithSAP="1" bitstreamSwitching="true">
<Representation id="1" bandwidth="534144">
<BaseURL>mevq_logo_720x306_0250k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="29052226-29054708">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
<Representation id="2" bandwidth="1078766">
<BaseURL>mevq_logo_720x306_0500k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="56003676-56006200">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
<Representation id="3" bandwidth="1745140">
<BaseURL>mevq_logo_720x306_0750k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="83686040-83688577">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
<Representation id="4" bandwidth="2295403">
<BaseURL>mevq_logo_720x306_1000k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="111588024-111590567">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
<Representation id="5" bandwidth="3797938">
<BaseURL>mevq_logo_720x306_1500k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="166960740-166963291">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
<Representation id="6" bandwidth="6418657">
<BaseURL>mevq_logo_720x306_2000k_int-150-150.webm</BaseURL>
<SegmentBase indexRange="222165200-222167753">
<Initialization range="0-229" />
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="1" mimeType="audio/webm" codecs="vorbis" lang="eng" audioSamplingRate="41000" subsegmentStartsWithSAP="1">
<Representation id="7" bandwidth="115479">
<BaseURL>evq_vorbis_128kbps_cues-5sec_tracks-2.webm</BaseURL>
<SegmentBase indexRange="11944509-11947524">
<Initialization range="0-4501" />
</SegmentBase>
</Representation>
</AdaptationSet>
有誰知道如何獲得/計算數字「SegmentBase indexRange」和「初始化範圍」的任何視頻?
在遵循這些鏈接之後,我仍然無法找到如何計算Initialization.range和SegmentBase.rangeIndex。你能解釋一個例子嗎?謝謝! –
開始下載SegmentBase.rangeIndex並查看其二進制數據: curl -o -r <1500-8000(SegmentBase.rangeIndex)> 您可以使用您可以下載/克隆dash.js項目中,代碼本身就有一個例子。 –
inbaly
所以你說我應該下載第一個查克並閱讀它,看看它在哪裏結束,然後用這些值填充MPD? –