Warning Alert with HTML Overlay

By using the HTML overlays inserted in the MPD, it is possible to alert all users of any threat that may be near their home or the location where they are viewing the content. 

            
            
    <?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:xlink="http://www.w3.org/1999/xlink"
        xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
        profiles="urn:mpeg:dash:profile:isoff-live:2011"
        type="static"
        mediaPresentationDuration="PT9M56.458S"
        minBufferTime="PT1.5S">
    <ProgramInformation>
        <Title>sample.mp4</Title>
    </ProgramInformation>
    <Period id="0" start="PT0.0S">
        <AdaptationSet id="0" mimeType="video/mp4" width="424" height="240" par="16:9" frameRate="24" segmentAlignment="true" startWithSAP="1" subsegmentAlignment="true" subsegmentStartsWithSAP="1">
            <SegmentTemplate timescale="90000" media="chunk_ctvideo_cfm4s_rid$RepresentationID$_cs$Time$_w1759006020_mpd.m4s" initialization="chunk_ctvideo_cfm4s_rid$RepresentationID$_cinit_w1759006020_mpd.m4s">
                <SegmentTimeline>
                    <S t="0" d="1012500"/>
                    <S d="1012500"/>
                    <S d="1012500"/>
                    <S d="476190"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="p0a0r0" codecs="avc1.42c01e" sar="1:1" bandwidth="420000" />
        </AdaptationSet>
        <AdaptationSet id="1" mimeType="audio/mp4" lang="eng" segmentAlignment="true" startWithSAP="1" subsegmentAlignment="true" subsegmentStartsWithSAP="1">
            <Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
            <SegmentTemplate timescale="48000" media="chunk_ctaudio_cfm4s_rid$RepresentationID$_cs$Time$_w1759006020_mpd.m4s" initialization="chunk_ctaudio_cfm4s_rid$RepresentationID$_cinit_w1759006020_mpd.m4s">
                <SegmentTimeline>
                    <S t="0" d="540000"/>
                    <S d="639984"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="p0a1r0" codecs="mp4a.40.2" audioSamplingRate="48000" bandwidth="99000">
            <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
            </Representation>
        </AdaptationSet>

        <!-- Alert Overlay -->
        <EventStream schemeIdUri="urn:mpeg:dash:event:2012" timescale="1">
            <Event presentationTime="0" duration="5" id="1">
                <OverlayEvent uri="http://alertsystem.com/emergency"
                              mimeType="text/html"
                              earlestResolutionTime="0.0"
                              z="1"
                              mode="start" />
            </Event>
        </EventStream>        
    </Period>
    </MPD>

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