Streaming dynamic playlist with GPAC

Question

After dozens of hours of googling and thoroughly reading every piece of info, I'm still unable to start dynamic MPD broadcasting.

I've installed GPAC version 2.3-DEV-rev832-g799d9e547-master. My OS Ubuntu 22

My goal is simple: I getting short videofiles from time to time, and I want to combine them to "pseudo-stream". My files have length exactly 30s, and I want to append them dynamically

gpac -i pl.m3u:ka=2000 -o live.mpd:dmode=dynamic

The playlist is very simple

##begin pl,m3u
../segment_0000.mp4
../segment_0001.mp4
##end playlist

What I get -- is a bunch of m4s files and few mp4 files, along with live.mpd file.

When i'm trying to play it, i have errors.

FFplay: hundreds of such:

[dash @ 0x7f2228000cc0] Failed to open fragment of playlist f=0/0   
    Last message repeated 2188 times
[dash @ 0x7f2228000cc0] Failed to open fragment of playlist f=0/0 

mpv: hundreds of such

[ffmpeg/demuxer] dash: Failed to open fragment of playlist
[ffmpeg/demuxer] dash: Failed to open fragment of playlist

And in the browser dash.js is just not playing.

MPD file does not containing any relative paths:

<?xml version="1.0"?>
<!-- MPD file Generated with GPAC version 2.3-DEV-rev832-g799d9e547-master at 2024-01-29T19:47:00.512Z -->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.000S" type="dynamic" availabilityStartTime="2024-01-29T19:47:00.510Z" publishTime="2024-01-29T19:47:00.512Z" minimumUpdatePeriod="PT0H0M1.000S" timeShiftBufferDepth="PT0H0M30.000S" profiles="urn:mpeg:dash:profile:full:2011">
 <ProgramInformation moreInformationURL="https://gpac.io">
  <Title>live.mpd generated by GPAC</Title>
 </ProgramInformation>

 <Period id="DID1" start="PT0H0M0.000S">
  <AdaptationSet segmentAlignment="true" maxWidth="1280" maxHeight="720" maxFrameRate="25" par="16:9" startWithSAP="1">
   <SegmentTemplate media="segment_0000_dash_track1_$Number$.m4s" initialization="segment_0000_dash_track1_init.mp4" timescale="12800" startNumber="1" duration="12800"/>
   <Representation id="1" mimeType="video/mp4" codecs="avc1.64001F" width="1280" height="720" frameRate="25" sar="1:1" bandwidth="1812813">
   </Representation>
  </AdaptationSet>
  <AdaptationSet segmentAlignment="true" startWithSAP="1">
   <SegmentTemplate media="segment_0000_dash_track2_$Number$.m4s" initialization="segment_0000_dash_track2_init.mp4" timescale="44100" startNumber="1" duration="44100"/>
   <Representation id="2" mimeType="audio/mp4" codecs="mp4a.40.2" audioSamplingRate="44100" bandwidth="1407">
    <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
   </Representation>
  </AdaptationSet>
 </Period>
</MPD>

I'm frustrated, it's critical thing in all my project, but i was unable to create the very basic playlist. Any help is really appreciated...