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Thread: How to configure multibitrate streams with multiple audio tracks?

  1. #1
    Join Date
    Nov 2012
    Posts
    2

    Question How to configure multibitrate streams with multiple audio tracks?

    Hi!

    We need multilanguage support for HLS and HDS and we don't want change our complex infrastructure. As we know HLS protocol can support one video stream with several language tracks (#EXT-X-MEDIA tag). But how to configure Wowza to do it?

    Our setup:
    - wowza server with dvr
    - broadcast HLS/HDS multibitrate channels for live and dvr (136 channels x 3 bitrates)
    - using smil files for multibitrate broadcasting

    We have a stream with three bitrates and several language (mixed pid), example stream files for broadcasting content:

    udp://228.8.10.144:10144?audioPID=110&videoPID=103


    How can we configure smil file for support it? For example our smil file looked like this:

    <smil>
    <head>
    </head>
    <body>
    <switch>
    <video src="sample_270p.stream" system-bitrate="500000"/>
    <video src="sample_360p.stream" system-bitrate="1000000"/>
    <video src="sample_576p.stream" system-bitrate="1400000"/>
    </switch>
    </body>
    </smil>


    The main problem: one smil file with three bitrate and several language track for each bitrate.

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    This is not supported with Wowza at present. The streams in the set must must already have language selected. The chunks Wowza packetizes will only have one audio and one video track

    Richard

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