Redundant HLS Streams in Wowza

Is it possible to add alternate (backup) streams to an HLS manifests in Wowza when using the Java API to generate the dynamic playlist (AMLST).

I have a code like this where I add dynamically the different bitrates, but I would like to add one backup stream. (I tried adding a second MediaListSegment but it does not seem to work).

package com.wowza.wms.plugin.test.module;

import com.wowza.wms.medialist.*;
import com.wowza.wms.module.*;
import com.wowza.wms.stream.*;
import com.wowza.wms.application.*;

public class ModuleAMLSTTestLive extends ModuleBase 
{
class MyMediaListProvider implements IMediaListProvider
{
    public MediaList resolveMediaList(IMediaListReader mediaListReader, IMediaStream stream, String streamName)
    {
        MediaList mediaList = new MediaList();

        MediaListSegment segment = new MediaListSegment();
        mediaList.addSegment(segment);

        MediaListRendition rendition1 = new MediaListRendition();
        segment.addRendition(rendition1);

        rendition1.setName(streamName+"_400");
        rendition1.setBitrateAudio(128000);
        rendition1.setBitrateVideo(400000);
        rendition1.setWidth(320);
        rendition1.setHeight(240);
        rendition1.setAudioCodecId("mp4a.40.2");
        rendition1.setVideoCodecId("avc1.66.12");

        MediaListRendition rendition2 = new MediaListRendition();
        segment.addRendition(rendition2);

        rendition2.setName(streamName+"_800");
        rendition2.setBitrateAudio(128000);
        rendition2.setBitrateVideo(800000);
        rendition2.setWidth(640);
        rendition2.setHeight(480);
        rendition2.setAudioCodecId("mp4a.40.2");
        rendition2.setVideoCodecId("avc1.77.31");

        return mediaList;
    }
}

public void onAppStart(IApplicationInstance appInstance)
{
    appInstance.setMediaListProvider(new MyMediaListProvider());
}

}

Solution

Although this is not supported in the API, I finally found a solution:

It is possible to define main and backup streams by specifing the streams with the absolute path of the stream in the URI or DOMAIN cupertino tags.

Sample smil:

<body>
  <switch>
      <video src="mp4:foo.mp4" system-bitrate="300000">
    <param name="videoCodecId" value="avc1.66.30" valuetype="data"/>
    <param name="audioCodecId" value="mp4a.40.2" valuetype="data"/>
    <param name="cupertinoTag.URI" value="http://serverwowza1.foo.com:1935/vod/mp4:foo.mp4/chunklist.m3u8" valuetype="data"/>
      </video>
      <video src="mp4:foo.mp4" system-bitrate="300000" >
    <param name="videoCodecId" value="avc1.66.30" valuetype="data"/>
    <param name="audioCodecId" value="mp4a.40.2" valuetype="data"/>
    <param name="cupertinoTag.URI" value="http://serverwowza2.foo.com:1935/vod/mp4:sample.mp4/chunklist.m3u8" valuetype="data"/>
      </video>
...