Multi bitrate live streaming

Wowza Streaming Engine
1

hi,

Can i get help on setting up live multi bitrate streaming.

The following are the questions

  1. Different bitrate stream to be sent to different port ?

  2. How to configure the smil file with these port numbers.

I tried the example given in https://www.wowza.com/docs/how-to-set-up-live-streaming-using-an-rtmp-based-encoder,but could not receive the streams. Please help me out with this

Thank you

2

You can stream over any port that you have enabled.

https://www.wowza.com/docs/how-to-install-and-configure-wowza-streaming-engine#addtionalPorts

But you don’t define ports per stream in a smil. You can serve the smil on any one port

Richard

3

If you mean streaming from Wowza, not exactly, but there is more you can do with smil files, and there is a variation involving the Transcoder.

Take a look at this article:

https://www.wowza.com/docs/how-to-set-up-adaptive-bitrate-streaming-using-mediastreamnamegroups-module

For creating the multi-bitrate streams, you can use the Wowza transcoder, and it has a way of grouping streams which essentially creates a smil file for clients. Take a look at the Transcoder Templates section of this article:

https://www.wowza.com/forums/showthread.php?13271-Wowza-Server-3-Preview-How-to-setup-and-run-live-stream-transcoder

Richard

4

Multi-bitrate streaming is covered in the mpegts tutorial:

https://www.wowza.com/docs/how-to-publish-and-play-a-live-stream-mpeg-ts-based-encoder)

Streams must be key frame aligned to be able to switch. Here is a way to see if your streams are aligned as necessary:

https://www.wowza.com/docs/how-to-debug-encoder-multi-bitrate-keyframe-alignment

With the Wowza 3 transcoder, you can send one high-quality stream to Wowza and let the transcoder transrate the lower quality versions, and they will be key frame aligned.

Richard

5

Is there any other method(other than smil) for streaming live multi bitrate streams to wowza.

6

I have a live transcoder which will generate 4 streams of different bitrate.(h264 streams IDR aligned)

How do i send these 4 streams to wowza such that wowza is able to switch across streams.

PS:In case of single live streams,im sending mpegts stream to a port defined in mpegts.stream file.

7

Hi Richard, Jason,

Thanks for your reply. I have gone through the tutorial on

How to publish and play a live stream (MPEG-TS based encoder)

If I create a smil file like what is indicated below, I have the following queries :

8

Hi

Are you sending these streams to Wowza or are you trying to view them from a Wowza server?

Jason