# 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 **<Module>** entry in the **<Modules>** 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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