# MPEG-TS stream lost sound via stream files
**URL:** https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849
**Category:** Wowza Streaming Engine
**Created:** [April 4, 2016, 2:46pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849 "2016-04-04T14:46:32Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Elnur\_Akhundov](https://community.wowza.com/u/Elnur_Akhundov)
#### Post date: [April 4, 2016, 2:46pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/1 "2016-04-04T14:46:32Z")
Hey,
I’m using Wowza Streaming Engine 4 Perpetual Edition 4.1.1 build13180 and try to stream from multicast to RTMP.
1. Added stream file with udp://239.255.0.75:5500
2. Connected to the stream via Live application and MeadiaCaster type RTP.
3. Incoming streams shows the stream ok like:
_Stream Uptime_
_az-tv.stream up since 04 Apr 2016 02:42:04 PM_
_az-tv.stream up for about a minute_
_Network Throughput_
_Bytes In: 11988760 @ 1.750 Mbits/s_
_Bytes Out: 0 @ 0.000 bits/s_
**The problem:** Test player shows video but no sound, however source comes with video and audio as well.
So, we need somehow fix this issue ASAP. Thank you, guys!
**UPDATE:**
Upgraded to the latest version: Wowza Streaming Engine Version 4.4.1 (build 17882)
The problem still exists, but find something can help:
With HLS ([http://my\_server:1935/live/az-atv.stream/playlist.m3u8](http://my_server:1935/live/az-atv.stream/playlist.m3u8)) video and audio is playing well with VLC player, but none of the other streams has sound as well as same HLS stream coud not play in JW Player or any other Web based players:
[http://my\_server:1935/live/az-atv.stream/manifest.mpd](http://my_server:1935/live/az-atv.stream/manifest.mpd)
rtmp://my\_stream:1935/live/az-atv.stream
**UPDATE:**
Logs show such thing:
LiveStreamPacketizerSanJose.handlePacket[live/_definst_/az-atv.stream][mp4a.40.33]: **MP3 Audio: Audio is not MPEG1 Layer 3. May not be playable by Flash player.**
Any thoughts? Is there any way to convert audio?
---
### Author:  [@Andrew\_Ramberg](https://community.wowza.com/u/Andrew_Ramberg)
#### Post date: [April 5, 2016, 8:53pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/2 "2016-04-05T20:53:35Z")
Hello,
You may want to try using the [transcoder](https://www.wowza.com/docs/how-to-set-up-and-run-wowza-transcoder-for-live-streaming#config_encode) to change the audio type to AAC audio. This is the default audio output type used with the “transcode” template, included with Wowza Streaming Engine.
Please see the Wowza [Specifications](https://www.wowza.com/products/streaming-engine/specifications) page for a list of supported input audio types.
Best regards,
Andrew
---
### Author:  [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)
#### Post date: [April 6, 2016, 6:53am UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/3 "2016-04-06T06:53:04Z")
The Wowza Transcoder is not supported on Mac OS. Are you running Mac? Otherwise the Transcoder ships with Wowza Streaming Engine and should be included.
Regards,
Salvadore
---
### Author:  [@Paul\_Shields](https://community.wowza.com/u/Paul_Shields)
#### Post date: [April 7, 2016, 7:10pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/4 "2016-04-07T19:10:17Z")
Hi,
You could request a [trial license](https://www.wowza.com/pricing/trial) to test and confirm that the Transcoder works in your environment and addresses the issues described. If so then a simple upgrade path would be to purchase the equivalent production license.
Paul
---
### Author:  [@Elnur\_Akhundov](https://community.wowza.com/u/Elnur_Akhundov)
#### Post date: [April 6, 2016, 12:58pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/5 "2016-04-06T12:58:42Z")
Thank you, Andrew.
My build not included transcoder. May I ask you for trial this add-on to verify does it fit for me to all my 150 streams OR how I can buy/try/install It on my Wowza Streaming Engine Version
4.4.1 (build 17882)?
---
### Author:  [@Elnur\_Akhundov](https://community.wowza.com/u/Elnur_Akhundov)
#### Post date: [April 6, 2016, 7:20pm UTC](https://community.wowza.com/t/mpeg-ts-stream-lost-sound-via-stream-files/46849/6 "2016-04-06T19:20:21Z")
No, Wowza installed on Linux OS on a server. Unfourtenantly transcoder not included.
May I ask somehow to send an add-on or incstruct how can I enable it?