PCM Alaw 8000b/s Tenvis IPRobot3 Audio

Wowza Streaming Engine
1

Currently experimenting with trial licence and trying to LIVE stream from a low-price Tenvis IPRobot3 H264. The stream parameters - all which are fine using VLC are:-

  1. Video rtsp://admin:admin@192.168.0.233[:8001]/0/videoN
  2. Audio rtsp://admin:admin@192.168.0.233[:8001]/0/audio
  3. Video and audio rtsp://admin:admin@192.168.0.233[:8001]/0/avN

So far, using Wowza, the video ONLY options work fine, however I have had no success streaming audio, trying the audio only option (’/audio’) nor the video/audio option (‘av1’). When selecting either of these streams under the ‘live’ application, I only get a blank output.

I have of course configured to use the transcoder, but with no success. Interrogating the streams using VLC, the stream is reported as H264 mpeg4 (10) PCM Alaw 8000b/s.

Any help or suggestions would be appreciated. Ideally changes I can easily make to the LIVE Application xml file please.

I’ve spent several hours to no avail. :slight_smile:

Please note, I have read and viewed as many Wowza videos and articles relating to IP camera stream/re-streaming, as I can find, but sadly have been unable to resolve my problem.

Many thanks

2

Please note, I have read and viewed as many Wowza videos and articles relating to IP camera stream/re-streaming, as I can find, but sadly have been unable to resolve my problem.

3

While A-Law audio is not compatible for streaming media you can convert the audio to AAC by using our Transcoder feature.

https://www.wowza.com/docs/wowza-transcoder

Specific instructions for converting only your audio to AAC and letting your video pass through unaltered can be found in the article below.

https://www.wowza.com/docs/how-to-transcode-only-the-audio-channel-of-an-incoming-stream

4

Thank you Kevin, but I have previously read and re-read both these articles several times to no avail.

Clearly I’m missing something somewhere.

I can only read again and perhaps start from scratch. The video streams fine… it’s just no audio!

5

You need to watch the live stream that is coming out of Transcoder.

  1. Configure Transcoder per the audio only article above.

  2. Make sure that Transcoder is enabled. This is a common error.

  3. Start your live feed.

  4. Go to your “Incoming Streams” page and you should see not only your live feed heading in but also the version coming out of Transcoder. This is the version that you need to watch.

6

Thanks again, but sadly after several attempts still no success…

BUT I have had success feeding the rtsp audio/video stream (av1) through VLC and udp’ing it into Wowza as per your 'How to publish and play a live stream (MPEG-TS based encoder) article. This works fairly well albeit with some buffering, but obviously this uses more server resource.

Sadly, I’m not sure what this is telling me? :frowning:

7

Is there a trial version Wowza Player available please for website embedding testing?

I understand JWplayer no longer has a free option. (I do however have access to earlier jw versions)

Thanks, I appreciate your help.