With 1.6.0 release, when loading an MPD, video briefly starts at segment size

[priyajeet]

I have the following MPD

<MPD mediaPresentationDuration="PT3M52.0S" minBufferTime="PT10.0S" type="static" profiles="urn:mpeg:dash:profile:isoff-live:2011" xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <ProgramInformation>
    </ProgramInformation>
    <Period start="PT0.0S">
        <AdaptationSet maxFrameRate="60" bitstreamSwitching="true" segmentAlignment="true" contentType="video">
            <Representation height="814" width="1920" bandwidth="8000000" codecs="avc1.64002a" mimeType="video/mp4" id="0">
                <SegmentTemplate startNumber="2" initialization="dash_1080.1.m4s" media="dash_1080.$Number$.m4s" duration="5000000" timescale="1000000">
                </SegmentTemplate>
            </Representation>
            <Representation height="362" width="854" bandwidth="2000000" codecs="avc1.42c01f" mimeType="video/mp4" id="1">
                <SegmentTemplate startNumber="2" initialization="dash_480.1.m4s" media="dash_480.$Number$.m4s" duration="5000000" timescale="1000000">
                </SegmentTemplate>
            </Representation>
        </AdaptationSet>
        <AdaptationSet bitstreamSwitching="true" segmentAlignment="true" contentType="audio">
            <Representation audioSamplingRate="44100" bandwidth="128290" codecs="mp4a.40.2" mimeType="audio/mp4" id="2">
                <AudioChannelConfiguration value="2" schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011"/>
                <SegmentTemplate startNumber="2" initialization="dash_audio.1.m4s" media="dash_audio.$Number$.m4s" duration="5000000" timescale="1000000">
                </SegmentTemplate>
            </Representation>
        </AdaptationSet>
    </Period>
</MPD>

After upgrading to 1.6.0, I am noticing that when the video 1st loads (with or without autoplay), it jumps to 5s (5s being the segment size) for a brief moment, and then goes back to 0s. The

I am still debugging myself, but maybe you guys have an idea what could be happening.

EDIT: In stream_video_source.createAndStartStreams_ the segmentIndexes start at 5s

0: shaka.media.SegmentIndex
    references: Array[46]
        0: shaka.media.SegmentReference
            endTime: 10
            startTime: 5

[tdrews]

We changed our implementation of @startNumber with SegmentTemplate to make it consistent with SegmentTimeline and SegmentList.

If you want playback to start from the beginning of your content then @startNumber should equal 1 and dash_1080.1.m4s, dash_480.1.m4s, etc., should be the first segments.

[priyajeet]

oh ok, thanks, I also updated my ticket above and that makes sense now.