When using $time$ and @duration in MPD file, the first $time$ value requested by Dash.js is negative.

[naeoc4509]

Environment

• [] The MPD passes the DASH-IF Conformance Tool on https://conformance.dashif.org/
• [] The stream has correct Access-Control-Allow-Origin headers (CORS)
• [] There are no network errors such as 404s in the browser console when trying to play the stream
• [] The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• [] The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page

• Link to playable MPD file:
• Dash.js version: latest - development (5.0.0)
• Browser name/version: Chrome / 127.0.6533.88
• OS name/version: Windows 10 Pro / 22H2

Hi, I'm Jaden

According to the contents of '@duration' in '5.3.9.5.2 Initialization Segment information' of ISO IEC 23009-1 : 2022 document,
I configured as below.

And when I created the video files like below,

But, 'Dash.js' player has a problem that it requests a negative value of '-120120' instead of '0' for $time$ as the first file.

It seems that it needs to be modified to match the standard document.

Thank you.

[dsilhavy]

Please upload your content on a server so we can check. Please also check if it is playing in Shaka Player as a second reference: https://shaka-player-demo.appspot.com/demo/

[naeoc4509]

As shown in the picture below, the Shaka Player below plays without any problems.

with log,

We cannot provide a server due to company security.
If you tell me the link to a storage that can be uploaded, I will upload all the mpd-related files.

[dsilhavy]

Do you see the same problem in dash.js 4.7.4: https://reference.dashif.org/dash.js/latest/samples/dash-if-reference-player/index.html

Please paste the content of your MPD here then, it should be enough to reproduce the problem

[naeoc4509]

Yes. Same problem occurs with 4.7.4 and previous versions.

I'm attaching the mpd file.

Remove '.txt' from the file name and use it.
dash.mpd.txt

And capture is below

<?xml version="1.0" encoding="UTF-8"?> <MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:dash:schema:mpd:2011" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:full:2011" type="static" mediaPresentationDuration="PT12M0.720S" minBufferTime="PT4S"> <Period start="PT0S"> <AdaptationSet id="0" contentType="video" segmentAlignment="true" mimeType="video/mp4" startWithSAP="1"> <Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/> <SegmentTemplate timescale="60000" duration="120120" startNumber="1" media="$RepresentationID$-$Time$.m4v" initialization="$RepresentationID$.init"> </SegmentTemplate> <Representation id="stream-video-0-5000Kbps" bandwidth="5000000" width="1920" height="1080" frameRate="30000/1001" codecs="avc1.4d4028"> </Representation> </AdaptationSet> <AdaptationSet id="1" lang="und" contentType="audio" segmentAlignment="true" mimeType="audio/mp4" startWithSAP="1"> <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/> <Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/> <SegmentTemplate timescale="48000" duration="96096" startNumber="1" media="$RepresentationID$-$Time$.m4a" initialization="$RepresentationID$.init"> </SegmentTemplate> <Representation id="stream-audio-1-und-256Kbps" bandwidth="256000" audioSamplingRate="48000" codecs="mp4a.40.2"> </Representation> </AdaptationSet> <AdaptationSet id="2" contentType="image" mimeType="image/jpeg"> <SegmentTemplate timescale="500" duration="30030" startNumber="1" media="$RepresentationID$-$Time$.jpg"> </SegmentTemplate> <Representation id="stream-image-200-49Kbps" bandwidth="49950" width="960" height="480"> <EssentialProperty schemeIdUri="http://dashif.org/guidelines/thumbnail_tile" value="3x2"/> </Representation> </AdaptationSet> </Period> </MPD>

[dsilhavy]

@naeoc4509 Can you please check if #4537 fixes your issue. The change should be available in nightly soon: https://reference.dashif.org/dash.js/nightly/samples/dash-if-reference-player/index.html

[naeoc4509]

It works well!

Thank you so much.