Problem with interleaved live stream with audio on RTMP player

Wowza Streaming Engine
1

Hello,

We are getting a stream from an ip camera with rtp over tcp (interleaved), them we stream it to flash over RTMP. We are experiencing a weird problem where even on local networks, where bandwidth is not a problem. Streams without audio work perfectly, but streams with audio (G.711 ALAW) work for about 20 seconds, then freeze for 2-3 seconds, start again work for a shorter time until at one point it freezes altogether. Throughout this process “buffer length” in flash gets longer and longer. Fiddling with buffer values in VHost.xml changes the intervals but nefer fixes the problem.

A point we notice is that audio starts immediately, even before live buffer is filled, but video stars after a few seconds. Seems like a synch issue but none of the methods in wowza forums work (sortbuffer, jitterbuffer etc.).

Our two questions are:

1.What are the relevant buffers that we can configure in VHost.xml while getting the stream from camera . Do we use RTP/DatagramConfiguration/Incoming, HostPort/SocketConfiguration/ReceiveBufferSize or does interleave have it’s own configuration?

  1. Does “recordWaitForVideoKeyFrame” work on live streams and if not is there something similar to filter out audio before the first keyframe

Thanks,

Özgür

2

In older versions of Wowza, G711 had the wrong sample rate hard coded on the transcoder. This was fixed in Wowza 3.6.3. I would suggest you update to the latest version of Wowza to see if the issue is resolved.

If not, I suggest you open a ticket with the support team. Please zip up your /conf and /logs files and send them, along with a link to this thread as reference and send them to support@wowza.com

Salvadore