Control which streams get transcoded with the Wowza Streaming Engine Java API

Updated on 07/16/2026 8:37 am PDT

You can use the Wowza Streaming Engine™ Java API to control which streams get transcoded.

Below is a simple module that uses the ILiveStreamTranscoderControl interface to control which streams get transcoded:

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

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

public class ModuleTranscoderControlByStream extends ModuleBase
{
    class TranscoderControl implements ILiveStreamTranscoderControl
    {
        public boolean isLiveStreamTranscode(String transcoder, IMediaStream stream)
        {
            // here is there you return true or false if you want stream transcoded
            if ( stream.isTranscodeResult() )
            {
                return false;
            } else {
                return true;
            }

}
    }

public void onAppStart(IApplicationInstance appInstance)
    {
        appInstance.setLiveStreamTranscoderControl(new TranscoderControl());
    }
}

To add this module to your application, edit [install-dir]/conf/[application]/Application.xml and add this module entry as the last entry in the list:

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<Module>
    <Name>ModuleTranscoderControlByStream</Name>
    <Description>ModuleTranscoderControlByStream</Description>
    <Class>com.wowza.wms.plugin.test.module.ModuleTranscoderControlByStream</Class>
</Module>

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