Using I-frame playlists to enable in AWS Elemental MediaPackage trick-play

PDFRSS

MediaPackage supports live trick-play by creating an I-frame playlist from an existing live stream. The I-frame playlist contains the I-frame only video segments that your player uses for the image thumbnails. For information about I-frame playlists, see the HTTP Live Streaming 2nd Edition specification.

To use an I-frame playlist to enable trick-play for HLS

• In the MediaPackage console, choose Include Iframe-only stream in the Segment settings when creating or editing an endpoint. MediaPackage generates I-frame only streams for each rendition in the parent playlist.

  This example HLS parent playlist generated by MediaPackage uses EXT-X-I-FRAME-STREAM-INF tags for each rendition and includes the "index_1_iframe.m3u8" and "index_2_iframe.m3u8" child playlist URIs.

  #EXTM3U
  #EXT-X-VERSION:4
  #EXT-X-INDEPENDENT-SEGMENTS
  #EXT-X-STREAM-INF:CODECS="avc1.42001f,mp4a.40.2",AVERAGE-BANDWIDTH=1000,RESOLUTION=1920x1080,VIDEO-RANGE=SDR,FRAME-RATE=30.0,BANDWIDTH=2000,CLOSED-CAPTIONS="CC"
  index_1.m3u8
  #EXT-X-STREAM-INF:CODECS="avc1.42001f,mp4a.40.2",AVERAGE-BANDWIDTH=2000,RESOLUTION=1920x1080,VIDEO-RANGE=SDR,FRAME-RATE=30.0,BANDWIDTH=3000,CLOSED-CAPTIONS="CC"
  index_2.m3u8
  #EXT-X-STREAM-INF:CODECS="mp4a.40.2",AVERAGE-BANDWIDTH=1000,BANDWIDTH=2000
  index_3.m3u8
  #EXT-X-I-FRAME-STREAM-INF:CODECS="avc1.42001f,mp4a.40.2",RESOLUTION=1920x1080,VIDEO-RANGE=SDR,BANDWIDTH=1000,URI="index_1_iframe.m3u8"
  #EXT-X-I-FRAME-STREAM-INF:CODECS="avc1.42001f,mp4a.40.2",RESOLUTION=1920x1080,VIDEO-RANGE=SDR,BANDWIDTH=1000,URI="index_2_iframe.m3u8"

  MediaPackage also inserts EXT-I-FRAMES-ONLY tags in the child playlist, and then generates and includes an I-frame only playlist in the stream. This playlist enables player functionality like fast forward and rewind.

  This example HLS child playlist generated by MediaPackage uses the EXT-X-I-FRAMES-ONLY tag and includes the index_1_iframe_0.ts segment URI.

  #EXTM3U
  #EXT-X-VERSION:4
  #EXT-X-INDEPENDENT-SEGMENTS
  #EXT-X-TARGETDURATION:6
  #EXT-X-MEDIA-SEQUENCE:0
  #EXT-X-DISCONTINUITY-SEQUENCE:0
  #EXT-X-I-FRAMES-ONLY
  #EXT-X-PROGRAM-DATE-TIME:2021-12-07T10:00:00Z
  #EXTINF:6.0,
  index_1_iframe_0.ts

To use an I-frame playlist to enable trick-play for DASH

• MediaPackage supports live trick-play by creating an I-frame representation from an existing live stream. The I-frame representation contains the I-frame only video segments that your player uses for the image thumbnails.

  For information about I-frame playlists with DASH, see the DASH-IF Interoperability Points specification, v4.3, section 3.2.9.

  In the MediaPackage console, choose Include Iframe-only stream in the Segment settings, when creating or editing an endpoint. MediaPackage generates I-frame only streams for each rendition in the DASH manifest.

  This example DASH manifest generated by MediaPackage uses a specific AdaptationSet that includes a <EssentialProperty schemeIdUri="http://dashif.org/guidelines/trickmode" /> element and Representation elements including both a frameRate and a maxPlayoutRate attributes, which values are representative of trickplay track properties.

  <MPD id="0" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" minimumUpdatePeriod="PT2S" minBufferTime="PT5S" timeShiftBufferDepth="PT1M4.559S" suggestedPresentationDelay="PT10S" availabilityStartTime="2024-01-01T00:00:00.000000+00:00" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:mspr="urn:microsoft:playready" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd" publishTime="2024-04-02T17:05:14.000894+00:00">
    <Period id="1712019690992" start="PT2209H1M30S">
      <AdaptationSet id="1170682507" contentType="video" mimeType="video/mp4" segmentAlignment="true" codingDependency="false">
        <EssentialProperty schemeIdUri="http://dashif.org/guidelines/trickmode" value="2137622408"/>
        <SegmentTemplate timescale="48000" media="cmaf-segment_$RepresentationID$_$Number$.mp4" initialization="cmaf-segment_$RepresentationID$_8005_init.mp4" startNumber="23393" presentationTimeOffset="831120">
          <SegmentTimeline>
            <S t="6589849554" d="180179"/>
            <S t="6590029734" d="180179"/>
            <S t="6590209914" d="180179"/>
            <S t="6590390094" d="180179"/>
            <S t="6590570274" d="180179"/>
            <S t="6590750454" d="180179"/>
            <S t="6590930634" d="180179"/>
            <S t="6591110814" d="180179"/>
            <S t="6591290994" d="180179"/>
            <S t="6591471174" d="180179"/>
            <S t="6591651354" d="180179"/>
            <S t="6591831534" d="180179"/>
            <S t="6592011714" d="180179"/>
            <S t="6592191894" d="180179"/>
            <S t="6592372074" d="180179"/>
            <S t="6592552254" d="180179"/>
          </SegmentTimeline>
        </SegmentTemplate>
        <Representation id="1_iframe" bandwidth="1048" frameRate="24000/90090" codecs="avc1.4D401F" width="1280" height="720" maxPlayoutRate="90"/>
        <Representation id="2_iframe" bandwidth="1572" frameRate="24000/90090" codecs="avc1.4D401F" width="1920" height="1080" maxPlayoutRate="90"/>
      </AdaptationSet>
      <AdaptationSet id="2137622408" contentType="video" mimeType="video/mp4" segmentAlignment="true">
        <SegmentTemplate timescale="48000" media="cmaf-segment_$RepresentationID$_$Number$.mp4" initialization="cmaf-segment_$RepresentationID$_8005_init.mp4" startNumber="23393" presentationTimeOffset="831120">
          <SegmentTimeline>
            <S t="6589849554" d="180179"/>
            <S t="6590029734" d="180179"/>
            <S t="6590209914" d="180179"/>
            <S t="6590390094" d="180179"/>
            <S t="6590570274" d="180179"/>
            <S t="6590750454" d="180179"/>
            <S t="6590930634" d="180179"/>
            <S t="6591110814" d="180179"/>
            <S t="6591290994" d="180179"/>
            <S t="6591471174" d="180179"/>
            <S t="6591651354" d="180179"/>
            <S t="6591831534" d="180179"/>
            <S t="6592011714" d="180179"/>
            <S t="6592191894" d="180179"/>
            <S t="6592372074" d="180179"/>
            <S t="6592552254" d="180179"/>
          </SegmentTimeline>
        </SegmentTemplate>
        <Representation id="1" bandwidth="2000000" frameRate="24000/1001" codecs="avc1.4D401F" width="1280" height="720"/>
        <Representation id="1" bandwidth="5000000" frameRate="24000/1001" codecs="avc1.4D401F" width="1920" height="1080"/>
      </AdaptationSet>
      <AdaptationSet id="972192134" contentType="audio" mimeType="audio/mp4" segmentAlignment="true" lang="und">
        <Label>und</Label>
        <SegmentTemplate timescale="48000" media="cmaf-segment_$RepresentationID$_$Number$.mp4" initialization="cmaf-segment_$RepresentationID$_8005_init.mp4" startNumber="23393" presentationTimeOffset="831120">
          <SegmentTimeline>
            <S t="6589853020" d="180224" r="1"/>
            <S t="6590213469" d="180224" r="1"/>
            <S t="6590573917" d="179200"/>
            <S t="6590753117" d="180224"/>
            <S t="6590933342" d="180224" r="3"/>
            <S t="6591654239" d="180224" r="1"/>
            <S t="6592014688" d="180224" r="3"/>
          </SegmentTimeline>
        </SegmentTemplate>
        <Representation id="6" bandwidth="191522" codecs="mp4a.40.2" audioSamplingRate="48000">
          <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
        </Representation>
      </AdaptationSet>
      <SupplementalProperty schemeIdUri="urn:scte:dash:utc-time" value="2024-04-02T17:04:13.680Z"/>
    </Period>
  </MPD>