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Thread: Using the same wowzasessionid for several live streams

  1. #1
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    Nov 2012
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    Default Using the same wowzasessionid for several live streams

    Hi,

    In order to propose a multi-bitrate video, we are used to chunk several HLS streams. To make those streams accessible from the iPhone, we group them in a m3u8 playlist. For instance:

    #EXTM3U
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2320000
    http://ichunk.livestream.com/212.125/livestreamiphone/57501_1146195_f7683b9d_1_2320@5979/chunklist.m3u8?wowzasessionid=275498999
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=52
    http://ichunk.livestream.com/212.125/livestreamiphone/57501_1146195_f7683b9d_1_2320@5979/chunklist.m3u8?wowzaaudioonly&wowzasessionid=275498999
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=198000
    http://ichunk.livestream.com/212.125/livestreamiphone/57501_1146195_f7683b9d_1_198@5979/chunklist.m3u8?wowzasessionid=795234147
    
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=678000
    http://ichunk.livestream.com/212.125/livestreamiphone/57501_1146195_f7683b9d_1_678@5979/chunklist.m3u8?wowzasessionid=813710936
    Does it make sense to use a different wowzasessionid per stream or is it a better practice to use the same for all the streams? What's the impact on Wowza performance?

    Thanks!

    Cheers,
    charly

  2. #2
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    Default

    Charly,

    Wowza takes care of this. Are you using .smil or other MediaList method?

    Richard

  3. #3
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    Nov 2012
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    Default

    Quote Originally Posted by rrlanham View Post
    Charly,

    Wowza takes care of this. Are you using .smil or other MediaList method?

    Richard
    To give you some context, we have a custom API endpoint starting to chunk a RMTP stream with MediaCaster. So in our case, we send x requests (depending of the number of bitrates) to this API end point. Then, to generate the m3u8 playlist containing the x HLS streams, we build 4 url containing the wowzasessionid pointing to a wowza server. The iPhone player points directly to the generated m3u8 playlist.

    What do you mean by wowza takes care of this? I don't know how wowza could generate a playlist like above as the streams are started separately.

    Does it make sense?

    Thanks for your help,
    charly

  4. #4
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    Default

    *bump

    What's the aim of wowzasessionid? Does it belong to a specific stream or a single user?

  5. #5
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    Wowza can be used as HTTP origin. Does this help?

    http://www.wowza.com/forums/content....caching-origin

    Richard

  6. #6
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    Nov 2012
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    Default

    Hi rrlanham, thank you very much for your help but it doesn't tell me what the wowzasessionid is. I have the opportunity to ask the question directly to a "wowza veteran" in our company, hope he'll know

    Cheers,
    charly

  7. #7
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    It identifies a single session, which is per client/user.

    Richard

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