# No audio from TBS 2600 encoder

**URL:** <https://community.wowza.com/t/no-audio-from-tbs-2600-encoder/42103>\
**Category:** Wowza Streaming Engine\
**Created:** [December 20, 2016, 11:42am UTC](https://community.wowza.com/t/no-audio-from-tbs-2600-encoder/42103 "2016-12-20T11:42:09Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mike\_O\_Rourke](https://avatars.discourse-cdn.com/v4/letter/m/b5e925/32.png) [@Mike\_O\_Rourke](https://community.wowza.com/u/Mike_O_Rourke)\
**Post date:** [December 20, 2016, 11:42am UTC](https://community.wowza.com/t/no-audio-from-tbs-2600-encoder/42103/1 "2016-12-20T11:42:09Z")

</div>

Hi. I have a TBS Technologies TBS2600 HD-SDI encoder (see [http://www.tbsdtv.com/products/tbs2600-hd-sdi-video-encoder.html](http://www.tbsdtv.com/products/tbs2600-hd-sdi-video-encoder.html)). The video feed comes from a camera with a BNC output, and the audio through a stereo 1/8" connection from an audio mixer (Bose ESP-88). The connection from the Wowza Streaming Server (v. 4.4.1, build 17882 on Ubuntu) to the encoder is via RTSP to the main output from the encoder. The connection is successful, but there is no audio track in the output to the client. When I connect directly to the encoder via RTSP from VLC, it plays fine. In this case, the codec information in VLC is:

Stream 0

Type: Video

Codec: H264 - MPEG-4 AVC (part 10) (h264)

Stream 1

Type: Audio

Codec: MPEG AAC Audio (mp4a)

Sample rate: 48000 Hz

Stream 2

Type: Video

Codec: H264 - MPEG-4 AVC (part 10) (h264)

Resolution: 1280x738

Display Resolution: 1280x720

Decoded format: Planar 4:2:0 YUV

Stream 3

Type: Audio

Codec: MPEG AAC Audio (mp4a)

Channels: Stereo

Sample rate: 48000 Hz

There is nothing in either the access or error logs concerning a lack of audio; there are, however, lost packets (usually 2 packets at a time). Currently, the camera is about 500 miles from the server, but I am in the process of setting up a new server on-site.

The nDVR is enabled, and I have tried with the Transcoder both enabled (audio set to “Passthrough”) and disabled.

What can I check?

Thank you.

Mike.

---

<div class="post-metadata">

**Author:** ![Nick\_ten\_Cate](https://avatars.discourse-cdn.com/v4/letter/n/71e660/32.png) [@Nick\_ten\_Cate](https://community.wowza.com/u/Nick_ten_Cate)\
**Post date:** [December 20, 2016, 8:53pm UTC](https://community.wowza.com/t/no-audio-from-tbs-2600-encoder/42103/2 "2016-12-20T20:53:10Z")

</div>

We use the same TBS encoder and use UDP to get the stream to Wowza. Works great 🙂 Maybe try that?

---

<div class="post-metadata">

**Author:** ![Alex\_C](https://avatars.discourse-cdn.com/v4/letter/a/bbe5ce/32.png) [@Alex\_C](https://community.wowza.com/u/Alex_C)\
**Post date:** [January 6, 2017, 11:19pm UTC](https://community.wowza.com/t/no-audio-from-tbs-2600-encoder/42103/3 "2017-01-06T23:19:54Z")

</div>

Hi mjoop1,

You could try changing the RTSP property that is outlined here:

[https://www.wowza.com/docs/how-to-specify-per-stream-settings-in-stream-files#rtspstreams](https://www.wowza.com/docs/how-to-specify-per-stream-settings-in-stream-files#rtspstreams)

It may resolve the issue.

Regards,

Alex