Support for DASH streaming

[somebadhat]

Feature Proposal

@goldfire Thanks for howler.js I use howler.js to listen to live audio streams.

The BBC has stopped supporting Shoutcast except for The World Service BBC4 for listeners outside the UK.

The BBC is changing the way they stream content to DASH.

A DASH manifest file: http://a.files.bbci.co.uk/ms6/live/3441A116-B12E-4D2F-ACA8-C1984642FA4B/audio/simulcast/dash/nonuk/pc_hd_abr_v2/ak/bbc_6music.mpd

The 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:dvb="urn:dvb:dash:dash-extensions:2014-1"
  xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
  type="dynamic" availabilityStartTime="1969-12-31T23:59:44Z"
  minimumUpdatePeriod="PT6H" timeShiftBufferDepth="PT6H" maxSegmentDuration="PT7S" minBufferTime="PT3.200S"
  profiles="urn:dvb:dash:profile:dvb-dash:2014,urn:dvb:dash:profile:dvb-dash:isoff-ext-live:2014"
  publishTime="2023-09-04T15:44:10">

<UTCTiming schemeIdUri="urn:mpeg:dash:utc:http-iso:2014" value="https://time.akamai.com/?iso" />

<BaseURL dvb:priority="1" dvb:weight="1" serviceLocation="aks">https://as-dash-ww-live.akamaized.net/pool_904/live/ww/bbc_6music/bbc_6music.isml/dash/</BaseURL>

<Period id="1" start="PT0S">
<AdaptationSet group="1" contentType="audio" lang="en" minBandwidth="48000" maxBandwidth="96000"
               segmentAlignment="true" audioSamplingRate="48000" mimeType="audio/mp4" codecs="mp4a.40.5" 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" initialization="bbc_6music-$RepresentationID$.dash"
                   media="bbc_6music-$RepresentationID$-$Number$.m4s" startNumber="1" duration="307200"/>
    <Representation id="audio=48000" bandwidth="48000"/>
    <Representation id="audio=96000" bandwidth="96000"/>
</AdaptationSet>

</Period>
</MPD>