Results 1 to 8 of 8

Thread: Multi bitrate live streaming

  1. #1
    Join Date
    Jul 2011
    Posts
    11

    Default Multi bitrate live streaming

    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 http://www.wowza.com/forums/content.php?36,but could not receive the streams. Please help me out with this

    Thank you

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    You can stream over any port that you have enabled.
    http://www.wowza.com/forums/content....addtionalPorts

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

    Richard

  3. #3
    Join Date
    Jul 2011
    Posts
    11

    Default

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

  4. #4
    Join Date
    Sep 2011
    Posts
    1,931

    Default

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

    Jason

  5. #5
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    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:
    http://www.wowza.com/forums/content....eGroups-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:
    http://www.wowza.com/forums/showthre...eam-transcoder

    Richard

  6. #6
    Join Date
    Jul 2011
    Posts
    11

    Default

    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. #7
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    Multi-bitrate streaming is covered in the mpegts tutorial:

    http://www.wowza.com/forums/content....-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:
    http://www.wowza.com/forums/content....rame-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

  8. #8
    Join Date
    Jul 2011
    Posts
    11

    Default Multi bit rate live streaming

    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 :

    <smil>
    <head>
    </head>
    <body>
    <switch>
    <video src="myStream_700.stream" system-bitrate="700000"/>
    <video src="myStream_350.stream" system-bitrate="350000"/>
    <video src="myStream_200.stream" system-bitrate="200000"/>
    </switch>
    </body>
    </smil>


    1. To which port(s) should the multi-bit rate encoder send the streams for wowza to listen to?
    2. How do I configure wowza's xml/smil/.stream file such that it is able to listen to these key frame
    aligned multi bit rate streaming?
    3. How will wowza be made to listen to these multiple ports simultaneously for all the streams?
    4. Also, the article on How to publish and play a live stream (MPEG-TS based encoder)
    seems to be more for vod. Eg., How to play in Adobe HTTP, Apple iOS seems to be more VOD.
    There is no reference provided for starting the Live Stream Manager. Hence, I am wondering
    whether this was for VOD. Kindly clarify.

    We want to test our live multi bit rate mpeg-ts based encoder with Wowza.

    Regards
    Vaishnavi

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •