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Thread: Is it possible to use Multicast input to create Unicast streams

  1. #1
    Join Date
    Nov 2012
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    5

    Default Is it possible to use Multicast input to create Unicast streams

    I have an SDP file created from the encoding of 2 video sources, encoded to 4 bitrates each.

    My goal is to have the client application hit Wowza with a URL that will give me only a certain Audio/Video track pair, and not to use Transcoder plugin. Alternately, Wowza sees the multiple track SDP and creates a URL for each.


    Put another way: can Wowza make use of an SDP with more than one video track, and if yes, how ?


    I can't find much confirmation in docs or forum if this is possible.

  2. #2
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    21,962

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    You can do this with mpeg-ts stream:

    http://www.wowza.com/forums/content....anguage-by-PID

    Richard

  3. #3
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    Default

    Hi Richard, I appreciate the reply. You have been the only one to reply on this (multiple video in SDP) in another forum post, but i'm not sure this is what I'm looking for in this case. here is my SDP (there is 4 tracks, 2 Audio/Video pairs). I would like to create two .stream files to reference each pair in Wowza, so that they become 2 URLs :


    v=0
    o=VSS_RTSPStreaming_pack_v.2.5.4.2 3563714866 0 IN IP4 10.26.0.54
    s=vss
    c=IN IP4 10.26.0.58/30
    a=x-broadcastcontrol:RTSP
    a=control:*
    m=video 7506 RTP/AVP 36
    a=rtpmap:36 H264/90000
    a=control:trackID=4
    a=cliprect:0,0,480,320
    a=framesize:36 480-320
    a=fmtp:36 packetization-mode=0;profile-level-id=4D4030;sprop-parameter-sets=Z0LgHpZUDwU3/gAQABIgAAB9AAAdRJCA,aO4GDMg=
    m=video 7502 RTP/AVP 36
    a=rtpmap:36 H264/90000
    a=control:trackID=2
    a=cliprect:0,0,480,320
    a=framesize:36 480-320
    a=fmtp:36 packetization-mode=0;profile-level-id=4D4030;sprop-parameter-sets=Z0LgHpZUDwU3/gAQABIgAAB9AAAdRJCA,aO4GDMg=
    m=audio 7504 RTP/AVP 97
    a=rtpmap:97 mpeg4-generic/44100/1
    a=control:trackID=3
    b=AS:64
    a=fmtp:97 streamtype=5;profile-level-id=41;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1208
    m=audio 7500 RTP/AVP 97
    a=rtpmap:97 mpeg4-generic/44100/1
    a=control:trackID=1
    b=AS:64
    a=fmtp:97 streamtype=5;profile-level-id=41;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1208

  4. #4
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    Default

    I don't think it is possible in Wowza, but I will check.

    Richard

  5. #5
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    Default

    I haven't tried this myself, but it's worth checking.
    Can you create two separate SDP files, each having one audio/video pair (trackID 3 and 4 | trackID 2 and 1) and the use those resulting two SDP files to create two separate upstreams to your encoder?
    http://www.wowza.com/forums/content....-with-SDP-file

    Zoran

  6. #6
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    Dec 2007
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    Also, along with Zoron's suggestion, you should enable port sharing:

    http://www.wowza.com/forums/content....and-multicast)

    Richard

  7. #7
    Join Date
    Nov 2012
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    Default

    Thanks again for your input Richard, Zoran.

    I have enable port sharing, and the issue is that my encoder (at the moment) will not output separate SDP files - rather it outputs one giant one with all the video streams together. Now, I tried hand editing the SDP content to break it up into two SDP files, but this did not work for the channels other than 1 & 2.

    It was a good idea Zoran.

    The issue is not the Wowza server incoming - this part works 100% - the issue is getting a unique URL to each of the video streams. It looks like this is possible with AudioPID but not video. alas...

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