LL-DASH stream not working with UDP input

[Nixon197]

System info

Operating System: Centos 7
Shaka Packager Version: v2.6.1-634af65-release

Issue and steps to reproduce the problem

Packager Command:

/opt/packager-linux-x64
'in=udp://127.0.0.1:1234,stream=audio,init_segment=http://127.0.0.1:6767/upload/audio_init.mp4,segment_template=http://127.0.0.1:6767/upload/audio_$Number$.m4s'
'in=udp://127.0.0.1:1234,stream=video,init_segment=http://127.0.0.1:6767/upload/h264_360p_init.mp4,segment_template=http://127.0.0.1:6767/upload/h264_360p_$Number$.m4s'
--utc_timings "urn:mpeg:dash:utc:http-iso:2014"="https://time.akamai.com/?iso"
--segment_duration 2
--low_latency_dash_mode=true
--strip_parameter_set_nalus=false
--mpd_output http://127.0.0.1:6767/upload/manifest_shaka.mpd

Extra steps to reproduce the problem?
Test Dash stream in shaka player

What is the expected result?
Working stream

What happens instead?
When using encoder which started earlier and using UDP as input Shaka packager starts numbering segments from 1 while player requests segments in relation with availabilityStartTime.
Player used: Shaka player v4.2.1

Files on disk:

Console output from shaka player:

Manifest:
manifest_shaka (9).zip

Am I missing something?

[acris5]

I have the same problem with segment numbers (shaka starts from 1, while browser start asking i+1800)

<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/shaka-project/shaka-packager version 7ce9dea-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="PT2S" type="dynamic" publishTime="2023-11-09T14:55:14Z" availabilityStartTime="2023-11-09T13:40:18Z" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT1800S">
  <Period id="0" start="PT0S">
    <ServiceDescription id="0">
      <Latency target="1000"/>
    </ServiceDescription>
    <AdaptationSet id="0" contentType="audio" segmentAlignment="true">
      <Representation id="0" bandwidth="6491" 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" duration="180000" availabilityTimeOffset="1.9786666666666666" availabilityTimeComplete="false" initialization="bitrate_1/audio_init.mp4" media="bitrate_1/audio_$Number%04d$.m4s" startNumber="1"/>
      </Representation>
    </AdaptationSet>
    <AdaptationSet id="1" contentType="video" maxWidth="1920" maxHeight="1080" frameRate="90000/3600" par="16:9">
      <Representation id="1" bandwidth="507812" codecs="avc1.640028" mimeType="video/mp4" sar="1:1" width="1920" height="1080">
        <SegmentTemplate timescale="90000" duration="180000" availabilityTimeOffset="1.96" availabilityTimeComplete="false" initialization="bitrate_2/video_init.mp4" media="bitrate_2/video_$Number%04d$.m4s" startNumber="1"/>
      </Representation>
      <Representation id="2" bandwidth="282112" codecs="avc1.640020" mimeType="video/mp4" sar="1:1" width="1280" height="720">
        <SegmentTemplate timescale="90000" duration="180000" availabilityTimeOffset="1.96" availabilityTimeComplete="false" initialization="bitrate_1/video_init.mp4" media="bitrate_1/video_$Number%04d$.m4s" startNumber="1"/>
      </Representation>
      <Representation id="3" bandwidth="179110" codecs="avc1.64001e" mimeType="video/mp4" sar="4:3" width="640" height="480">
        <SegmentTemplate timescale="90000" duration="180000" availabilityTimeOffset="1.96" availabilityTimeComplete="false" initialization="bitrate_3/video_init.mp4" media="bitrate_3/video_$Number%04d$.m4s" startNumber="1"/>
      </Representation>
    </AdaptationSet>
  </Period>
  <UTCTiming schemeIdUri="urn:mpeg:dash:utc:http-xsdate:2014" value="https://time.akamai.com/?iso"/>

[lfdominguez]

I'm having this problem too, I will try to review the code and check if Shaka on low latency generate the $Number$ based on availabilityStartTime

[lfdominguez]

I tried using --start_segment_number <number> but this not work, always set the Start on 1, never change