# ULL streams has no audio

**URL:** <https://community.wowza.com/t/ull-streams-has-no-audio/53177>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [April 16, 2019, 3:53pm UTC](https://community.wowza.com/t/ull-streams-has-no-audio/53177 "2019-04-16T15:53:45Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![Denis\_Khaletckii1](https://avatars.discourse-cdn.com/v4/letter/d/f14d63/32.png) [@Denis\_Khaletckii1](https://community.wowza.com/u/Denis_Khaletckii1)\
**Post date:** [April 16, 2019, 3:53pm UTC](https://community.wowza.com/t/ull-streams-has-no-audio/53177/1 "2019-04-16T15:53:45Z")

</div>

Hi,

I set and publish a stream (sent to engine using RTMP protocol) to the default live app instance (it has the stream file: 5cb42f878e1dd.stream with the stream address: rtmp://192.168.1.194:1935/dustin/5cb42f878e1dd):

```auto
liveAppDefaultInstance
	.getStreams()
	.setStreamName(stream, "5cb42f878e1dd.stream");

liveAppDefaultInstance
	.getStreams()
	.getStream("5cb42f878e1dd.stream")
	.publish();

```

and then try to watch it in wowza player. Video works but it has no sound. In console wowza player says:

ERROR: PlayerStreamer: unknown audioCodec

INFO: PlayerStreamer: creating sourceBuffers: videoCodec:avc1.4d001f audioCodec:

INFO: PlayerStreamer: canPlay video/mp4;codecs=“avc1.4d001f”: probably

although onCodecInfoAudio listener in the live app says that the stream has mp4a.40.2 audio codec. HLS streams works properly (video and audio). When I use the default audioonly transcoder it works properly but I cannot use transcoding on my production server.

Reproduced on Wowza Streaming Engine 4 Developer Edition 4.7.7.

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_[View the full topic](https://community.wowza.com/t/ull-streams-has-no-audio/53177)._