wrong $Number$ value while reading mpd

[Kostik]

Hello,

using the latest static build ffmpeg version N-57631-gebedd26eef-static
I want to read mpd and convert to mpegts - this part works ok,
except one manifest
looks like ffmpeg make wrong calculation for $Number$

In my case I have
availabilityStartTime="2021-05-27T11:59:16Z"
media="$RepresentationID$-$Number$.m4s"
duration="180180"
startNumber="487925"
presentationTimeOffset="89360526151"

I expect $Number$ to be converted to 488430 (and other players do so), but ffmpeg try retrieve 397033568

here is full manifest

<?xml version="1.0" encoding="UTF-8"?>
<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:cenc="urn:mpeg:cenc:2013" xmlns:mspr="urn:microsoft:playready" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" type="dynamic" minimumUpdatePeriod="PT6S" minBufferTime="PT1.000S" maxSegmentDuration="PT3.003S" availabilityStartTime="2021-05-27T11:59:16Z" timeShiftBufferDepth="PT36.036S" publishTime="2021-06-07T19:25:48Z" profiles="urn:mpeg:dash:profile:isoff-live:2011">
  <Period id="487925" start="PT976813.47S">
    <AdaptationSet mimeType="video/mp4" segmentAlignment="true" startWithSAP="1" maxWidth="1280" maxHeight="720" maxFrameRate="60000/1001" par="16:9">
      <InbandEventStream schemeIdUri="urn:mpeg:dash:event:2012" value="1"/>
      <Accessibility schemeIdUri="urn:scte:dash:cc:cea-608:2015" value="CC1:und;CC2:und"/>
      <SegmentTemplate timescale="90000" media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
      <Representation id="video1" width="1280" height="720" frameRate="60000/1001" sar="1:1" scanType="progressive" bandwidth="6562944" codecs="avc1.640029"/>
    </AdaptationSet>
    <AdaptationSet mimeType="audio/mp4" lang="en" segmentAlignment="true" startWithSAP="1">
      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
      <SegmentTemplate timescale="90000" media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
      <Representation id="audio1" audioSamplingRate="44100" bandwidth="96000" codecs="mp4a.40.2">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
      </Representation>
    </AdaptationSet>
    <AdaptationSet mimeType="audio/mp4" lang="es" segmentAlignment="true" startWithSAP="1">
      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="dub"/>
      <SegmentTemplate timescale="90000" media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
      <Representation id="audio2" audioSamplingRate="44100" bandwidth="96000" codecs="mp4a.40.2">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
      </Representation>
    </AdaptationSet>
  </Period>
  <UTCTiming schemeIdUri="urn:mpeg:dash:utc:direct:2014" value="2021-06-07T19:25:48Z"/>
</MPD>