# ITranscoderAudioEncoderNotify: how to hook it up

**URL:** <https://community.wowza.com/t/itranscoderaudioencodernotify-how-to-hook-it-up/96541>\
**Category:** Wowza Streaming Engine\
**Created:** [October 5, 2023, 2:45pm UTC](https://community.wowza.com/t/itranscoderaudioencodernotify-how-to-hook-it-up/96541 "2023-10-05T14:45:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Scott\_Kellicker2](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/scott_kellicker2/32/1337_2.png) [@Scott\_Kellicker2](https://community.wowza.com/u/Scott_Kellicker2)\
**Post date:** [October 5, 2023, 2:45pm UTC](https://community.wowza.com/t/itranscoderaudioencodernotify-how-to-hook-it-up/96541/1 "2023-10-05T14:45:09Z")

</div>

The WSE docs for transcoder have several interfaces for listening to frames.

For example, **ITranscoderAudioFrameNotify2** can be used to listen to raw **decoded** audio packets by calling TranscoderSessionAudio.addListener(). Works great. There is an equivalent for video called ITranscoderVideoDecoderNotify.

I can listen to raw **encoded** video frames using **ITranscoderVideoEncoderNotify** and calling  
**TranscoderSessionVideoEncode.addFrameListener**.

There is an equivalent documented listener (see WSE Java API reference) for audio called **ITranscoderAudioEncoderNotify**. However, there seems to be no way to hook it up. (There is no **TranscoderSessionAudioEncode.addFrameListener,** nor can I find **ITranscoderAudioEncoderNotify** referenced anywhere else)