用于具有非零重复计数的段列表的Dash播放器

Question

  <Period programDateTime='2021-03-17T07:15:26.239Z' duration='PT1M04.078S'>
    <AdaptationSet contentType='video' mimeType='video/mp4' par='16:9' id='7'>
      <SegmentList timescale='90000' presentationTimeOffset='4327131510'>
        <SegmentTimeline>
          <!-- Doesn't work -->
          <S t='4327131510' d='2903310' r='1' />

<!--      Uncomment below and remove the above and manifest will work -->   
<!--      <S t='4327131510' d='2903310'/>-->
<!--      <S t='4330034820' d='2903310'/>-->
        </SegmentTimeline>
      </SegmentList>

      <Representation id='1280x720' codecs='avc1.4d0029' width='1280' height='720' bandwidth='100000'>
        <BaseURL>http://localhost:8000/downloaded/</BaseURL>
        <SegmentList>
          <Initialization sourceURL='1.m4v' />
          <SegmentURL media='1.m4v' />
          <SegmentURL media='2.m4v' />
        </SegmentList>
      </Representation>
    </AdaptationSet>
  </Period>

Dash播放器开始播放清单，但是，它跳过了2.m4v并将视频大小减少到只有第一个片段。但是，如果我删除重复计数字段，并在segmentTimeline中显式指定每个段，那么它就可以正常工作。

这个清单在Shaka player中也工作得很好。

Answer 1

你的载货单看起来不对劲。我不认为有时间线的第一段列表应该在那里。我会尝试：

<Period programDateTime='2021-03-17T07:15:26.239Z' duration='PT1M04.078S'>

  <AdaptationSet contentType='video' mimeType='video/mp4' par='16:9' id='7'>
  
    <Representation id='1280x720' codecs='avc1.4d0029' width='1280' height='720' bandwidth='100000'>
    
      <BaseURL>http://localhost:8000/downloaded/</BaseURL>
      
      <SegmentList timescale='90000' duration='2903310'>
      
        <Initialization sourceURL='1.m4v' />
        <SegmentURL media='1.m4v' />
        <SegmentURL media='2.m4v' />
        
      </SegmentList>
      
    </Representation>
    
  </AdaptationSet>
  
</Period>