Comandos SCTE-35 em banda usados para intervalos comerciais

A API Live Stream oferece suporte a dois métodos para inserir intervalos de anúncios em uma transmissão ao vivo:

Esta página descreve o comando SCTE-35 na banda usado para intervalos de anúncios.

Os marcadores de anúncios são transmitidos no fluxo de entrada e precisam estar em conformidade com o Especificação SCTE-35 Mensagem de sinal de inserção de programa digital para cabo. Os dados SCTE-35 podem ser transmitidos em um fluxo de dados elementar MPEG-TS usando um tipo de fluxo elementar igual a 0x86. Somente os fluxos de entrada SRT podem ser usados para ingerir comandos internos do SCTE-35.

A API Live Stream analisa todos os PIDs no fluxo elementar do TS.

Na lista de comandos SCTE-35, a API Live Stream oferece suporte ao comando splice_insert, conforme definido em SCTE-35.

Arquivo de manifesto do HLS

Para HLS, cada comando de união gera uma Marcador #EXT-X-CUE-OUT/#EXT-X-CUE-OUT-CONT/#EXT-X-CUE-IN no manifesto lista de reprodução. O comando de emenda também gera uma entrada #EXT-OATCLS-SCTE35 com os dados SCTE-35 codificados no formato base64, conforme mostrado abaixo:

#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:44:44.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000007.m4s
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:44:48.143Z
#EXTINF:1.212833
720p60_h264_fmp4-0000000008.m4s
#EXT-OATCLS-SCTE35:/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-CUE-OUT:45.000000
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:44:49.356Z
#EXTINF:2.787167
720p60_h264_fmp4-0000000009.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=2.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:44:52.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000010.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=6.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:44:56.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000011.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=10.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:00.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000012.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=14.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:04.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000013.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=18.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:08.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000014.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=22.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:12.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000015.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=26.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:16.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000016.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=30.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:20.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000017.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=34.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:24.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000018.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=38.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:28.143Z
#EXTINF:4.000000
720p60_h264_fmp4-0000000019.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=42.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:32.143Z
#EXTINF:2.000000
720p60_h264_fmp4-0000000020.m4s
#EXT-X-CUE-OUT-CONT:ElapsedTime=44.787167,Duration=45.000000,SCTE35=/DAlAAAAAAAAAP/wFAVDE1agf+//yBysA/4APcxQAAAAAAAAXhEvvQ==
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:34.143Z
#EXTINF:0.212833
720p60_h264_fmp4-0000000021.m4s
#EXT-X-CUE-IN
#EXT-X-PROGRAM-DATE-TIME:2023-05-19T17:45:34.358Z
#EXTINF:3.784522
720p60_h264_fmp4-0000000022.m4s

Arquivo de manifesto DASH

Para o DASH, cada comando de união gera um novo período com um <EventStream>. no arquivo MPD, conforme mostrado abaixo:

<Period id="Dash-32.475" start="PT32.475S">
  <AdaptationSet segmentAlignment="true" maxWidth="1280" maxHeight="720">
    <Representation mimeType="video/mp4" id="720p60_h264_fmp4" codecs="avc1.4d001f" width="1280" height="720" startWithSAP="1" bandwidth="2100000">
      <SegmentTemplate timescale="1000000" initialization="720p60_h264_fmp4/720p60_h264_fmp4-initialization_segment_0000000000.m4s" media="720p60_h264_fmp4/720p60_h264_fmp4-$Number%010d$.m4s" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
    <Representation mimeType="video/mp4" id="360p30_h264_fmp4" codecs="avc1.4d001e" width="640" height="360" startWithSAP="1" bandwidth="600000">
      <SegmentTemplate timescale="1000000" initialization="360p30_h264_fmp4/360p30_h264_fmp4-initialization_segment_0000000000.m4s" media="360p30_h264_fmp4/360p30_h264_fmp4-$Number%010d$.m4s" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <AdaptationSet segmentAlignment="true" mimeType="audio/mp4" id="1" label="441k_160_aac_fmp4">
    <Representation id="441k_160_aac_fmp4" codecs="mp4a.40.2" audioSamplingRate="44100" startWithSAP="1" bandwidth="160000">
      <SegmentTemplate timescale="1000000" initialization="441k_160_aac_fmp4/441k_160_aac_fmp4-initialization_segment_0000000000.m4s" media="441k_160_aac_fmp4/441k_160_aac_fmp4-$Number%010d$.m4s" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <AdaptationSet segmentAlignment="true" mimeType="audio/mp4" id="2" label="48k_160_aac_fmp4">
    <Representation id="48k_160_aac_fmp4" codecs="mp4a.40.2" audioSamplingRate="48000" startWithSAP="1" bandwidth="128000">
      <SegmentTemplate timescale="1000000" initialization="48k_160_aac_fmp4/48k_160_aac_fmp4-initialization_segment_0000000000.m4s" media="48k_160_aac_fmp4/48k_160_aac_fmp4-$Number%010d$.m4s" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <AdaptationSet contentType="text" lang="en-US" segmentAlignment="true">
    <Representation mimeType="text/vtt" id="caption_webvtt_en_webvtt" bandwidth="4698">
      <SegmentTemplate timescale="1000000" media="caption_webvtt_en_webvtt/caption_webvtt_en_webvtt-$Number%010d$.vtt" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <AdaptationSet contentType="text" lang="es-CO" segmentAlignment="true">
    <Representation mimeType="text/vtt" id="caption_webvtt_es_webvtt" bandwidth="5450">
      <SegmentTemplate timescale="1000000" media="caption_webvtt_es_webvtt/caption_webvtt_es_webvtt-$Number%010d$.vtt" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <AdaptationSet contentType="text" lang="zh-CN" segmentAlignment="true">
    <Representation mimeType="text/vtt" id="caption_webvtt_zh_webvtt" bandwidth="7329">
      <SegmentTemplate timescale="1000000" media="caption_webvtt_zh_webvtt/caption_webvtt_zh_webvtt-$Number%010d$.vtt" startNumber="9" presentationTimeOffset="1684475755212833">
        <SegmentTimeline>
          <S t="1684475755212833" d="2787167"/>
          <S t="1684475758000000" d="4000000" r="9"/>
          <S t="1684475798000000" d="2000000"/>
          <S t="1684475800000000" d="212833"/>
        </SegmentTimeline>
      </SegmentTemplate>
    </Representation>
  </AdaptationSet>
  <EventStream timescale="1000000" schemeIdUri="urn:scte:scte35:2013:xml">
    <Event duration="45000000" id="1684475755">
      <SpliceInfoSection xmlns="http://www.scte.org/schemas/35">
        <SpliceInsert outOfNetworkIndicator="true" spliceImmediateFlag="true">
          <BreakDuration autoReturn="true" duration="45000000"/>
        </SpliceInsert>
      </SpliceInfoSection>
    </Event>
  </EventStream>
</Period>