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Published 20 hours ago • verified publisher icon shaka-project

EBU Teletext in MPEG-TS (#1344) is not working correctly now

Open acris5 opened this issue 5 months ago • 3 comments

System info

Operating System: docker Shaka Packager Version: b5c2cb8 (main)

Issue and steps to reproduce the problem

I use live mpegts source to create HLS and Dash videos with teletext. Packager Command:

packager  \
'in=/shaka-packager/pipes/pipe1,stream=video,init_segment=/shaka-results/bitrate_1/video_init.mp4,segment_template=/shaka-results/bitrate_1/video_$Number$.m4s,playlist_name=/shaka-results/bitrate_1/video.m3u8' \
'in=/shaka-packager/pipes/pipe1,stream=audio,lang=ru,init_segment=/shaka-results/bitrate_1/audio_init.mp4,segment_template=/shaka-results/bitrate_1/audio_$Number$.m4s,playlist_name=/shaka-results/bitrate_1/audio.m3u8' \
'in=/shaka-packager/pipes/pipe1,stream=text,format=ttml+mp4,init_segment=/shaka-results/bitrate_1/text_init.mp4,segment_template=/shaka-results/bitrate_1/text_$Number$.m4s,lang=ru,playlist_name=/shaka-results/bitrate_1/text.m3u8' \
 --max_hd_pixels 8294400 --hls_master_playlist_output /shaka-results/demo_master.m3u8 --mpd_output /shaka-results/manifest.mpd --hls_playlist_type LIVE \
 --segment_duration 2 --min_buffer_time 4 --suggested_presentation_delay 10 --time_shift_buffer_depth 12 --allow_approximate_segment_timeline --preserved_segments_outside_live_window 20

What is the expected result? Live playing in HLS.js and dash.js players. This feature worked correctly with this version Shaka Packager Version: e21519bb28d848720a4d8a4491e2ac6d1a8c16bb

<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/shaka-project/shaka-packager version 1ad0a4c150-release-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT4S" type="dynamic" publishTime="2024-08-29T08:27:37Z" availabilityStartTime="2024-08-29T08:25:44Z" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT12S" suggestedPresentationDelay="PT10S">
  <Period id="0" start="PT0S">
    <AdaptationSet id="0" contentType="video" width="1920" height="1080" frameRate="90000/3600" segmentAlignment="true" par="16:9">
      <Representation id="0" bandwidth="10669404" codecs="avc1.640028" mimeType="video/mp4" sar="1:1">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/video_init.mp4" media="bitrate_1/video_$Number$.m4s" startNumber="50">
          <SegmentTimeline>
            <S t="8967600" d="180000" r="6"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="1" contentType="audio" lang="ru" segmentAlignment="true">
      <Representation id="1" bandwidth="141930" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="48000">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
        <SegmentTemplate timescale="90000" initialization="bitrate_1/audio_init.mp4" media="bitrate_1/audio_$Number$.m4s" startNumber="50">
          <SegmentTimeline>
            <S t="8821179" d="180480" r="4"/>
            <S t="9723579" d="176640"/>
            <S t="9900219" d="180480" r="1"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="2" contentType="text" lang="ru" segmentAlignment="true">
      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="subtitle"/>
      <Representation id="2" bandwidth="3216" codecs="stpp" mimeType="application/mp4">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/text_init.mp4" media="bitrate_1/text_$Number$.m4s" startNumber="50">
          <SegmentTimeline>
            <S t="8820000" d="180000" r="6"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>

What happens instead? Shaka produces wrong teletext segments time. Starts from 0, then increases but when it reaches current time of video and audio then packager stops working and writes to log that packaging is finished.

<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/shaka-project/shaka-packager version 183f1b2e05-release-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT4S" type="dynamic" publishTime="2024-08-29T08:29:31Z" availabilityStartTime="2024-08-29T08:29:26Z" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT12S" suggestedPresentationDelay="PT10S">
  <Period id="0" start="PT0S">
    <AdaptationSet id="0" contentType="video" width="1920" height="1080" frameRate="90000/3600" segmentAlignment="true" par="16:9">
      <Representation id="0" bandwidth="4965184" codecs="avc1.640028" mimeType="video/mp4" sar="1:1">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/video_init.mp4" media="bitrate_1/video_$Number$.m4s" startNumber="1">
          <SegmentTimeline>
            <S t="187200" d="180000" r="1"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="1" contentType="audio" lang="ru" startWithSAP="1" segmentAlignment="true">
      <Representation id="1" bandwidth="138940" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="48000">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
        <SegmentTemplate timescale="90000" initialization="bitrate_1/audio_init.mp4" media="bitrate_1/audio_$Number$.m4s" startNumber="1">
          <SegmentTimeline>
            <S t="137108" d="44160"/>
            <S t="181268" d="180480" r="1"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="2" contentType="text" lang="ru" segmentAlignment="true">
      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="subtitle"/>
      <Representation id="2" bandwidth="1708" codecs="stpp" mimeType="application/mp4">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/text_init.mp4" media="bitrate_1/text_$Number$.m4s" startNumber="1">
          <SegmentTimeline>
            <S t="0" d="180000"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>


<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/shaka-project/shaka-packager version 183f1b2e05-release-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT4S" type="dynamic" publishTime="2024-08-29T08:32:43Z" availabilityStartTime="2024-08-29T08:29:26Z" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT12S" suggestedPresentationDelay="PT10S">
  <Period id="0" start="PT0S">
    <AdaptationSet id="0" contentType="video" width="1920" height="1080" frameRate="90000/3600" segmentAlignment="true" par="16:9">
      <Representation id="0" bandwidth="10493236" codecs="avc1.640028" mimeType="video/mp4" sar="1:1">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/video_init.mp4" media="bitrate_1/video_$Number$.m4s" startNumber="92">
          <SegmentTimeline>
            <S t="16567200" d="180000" r="6"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="1" contentType="audio" lang="ru" startWithSAP="1" segmentAlignment="true">
      <Representation id="1" bandwidth="144160" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="48000">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
        <SegmentTemplate timescale="90000" initialization="bitrate_1/audio_init.mp4" media="bitrate_1/audio_$Number$.m4s" startNumber="92">
          <SegmentTimeline>
            <S t="16382228" d="180480" r="2"/>
            <S t="16923668" d="176640"/>
            <S t="17100308" d="180480" r="3"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="2" contentType="text" lang="ru" segmentAlignment="true">
      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="subtitle"/>
      <Representation id="2" bandwidth="6652" codecs="stpp" mimeType="application/mp4">
        <SegmentTemplate timescale="90000" initialization="bitrate_1/text_init.mp4" media="bitrate_1/text_$Number$.m4s" startNumber="33">
          <SegmentTimeline>
            <S t="5760000" d="180000" r="6"/>
          </SegmentTimeline>
        </SegmentTemplate>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>

Players can't play manifest with different time inside so they freeze video at start.

acris5 avatar Aug 29 '24 08:08 acris5