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Thread: Multicast publisher dont work correctly!

  1. #1
    Join Date
    Aug 2011
    Posts
    100

    Default Multicast publisher dont work correctly!

    Hi i have install Multicast publisher, it work, but some time stream is freeze!
    in my multicastmap i have that one
    my1.stream={name:my1.stream,stream:239.1.1.1:1234,isRTPWrapped:true}

    i have record that multicast over dumprtp and in file i can see freeze, i have look that stream over UDPXY, the same!
    If i stream multicast over VLC, it work perfect
    Can some one help me what i am doing wrong?

  2. #2

    Default

    Hi Lelik,

    Is there any other information you can provide to help narrow down the problem? Start with the basics: encoder, settings, load, CPU/mem usage, software versions, modules, error messages, etc..

  3. #3
    Join Date
    Aug 2011
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    Default

    Ok! Sory! I will try explain it
    I have transcoders based on vlc, after vlc that streams going to erlyvideo

    I am receiving 110 rtmp streams on Wowza from erlyvideo, that streams are h264/aac
    after Wowza over http and rtmp streams playing well, but i need muticast also, thats why i have setup multicast publisher

    My Wowza is on Ubuntu 11.10 Server edition, on Intel XEON 5620 X 2 (used 30%), RAM 32GB (used 16GB)
    Outgoing trafic is 1.9Gb, i have agregate interfaces in bound
    Incoming trafic is around 225Mb

    Wowza Media Server 3.0.4 build1127


    java version "1.6.0_26"
    Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
    Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)

  4. #4
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    Aug 2011
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    Default

    What information you need more?
    And i have test, if i stream 20 strams, multicast workingperfect, if i stream 110 streams, multicast is freezing

  5. #5
    Join Date
    Sep 2011
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    1,933

    Default

    Hi
    With that many streams you are better running two instances of Wowza on the server, (50 streams) and (60 streams) for example.
    Take a look at the tuning guide here,
    http://www.wowza.com/forums/content....ormance-Tuning

    The maximum threads is 480/320 and you have a Duel Quad core processor which makes you (loose out) on some of your machines potential.

    If you had two instances of Wowza running then you can tune each to have the maximum threads, being more efficient (as far an machine potential in concerned).

    Jason

  6. #6
    Join Date
    Aug 2011
    Posts
    100

    Default

    I have done what is on this tuning guide http://www.wowza.com/forums/content....ormance-Tuning
    after that i start to publish 10 mlticast streams

    On Wowza Server i start
    dumprtp 239.1.1.1 1234 1> /dev/null

    after i see that message
    RTP: NETWORK CONGESTION - expected 30048, received 30049


    In HEX This one (30049) is 7561


    At the same time on second console of Wowza i start tcpdump to look what Wowza sending over multicast

    tcpdump -x -i eth0 host 239.1.1.1 |grep "0x0010:"
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7537
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 754c
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7561
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7562
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7563
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7564
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7565
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7566
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7567
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7568
    0x0010: ef01 012f 8fd4 04d2 0538 007c 8021 7569

    So my qestion is:
    Where packets from 7537 to 754c, and 754c to 7561
    Wowza dont send them

    May be there is some special tunnig for multicast?

  7. #7
    Join Date
    Sep 2011
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    1,933

    Default

    Hi
    Do you have the same problem when streaming only one stream on each?
    20 streams was fine before and now you can't stream 10...

    If you tune a server you should be getting better performance not worse!, I think you have some other issues with the server.
    Have you got any custom modules or written any code for fixing anything on the Wowza server? (old or new)

    More info on Multicast can be found here,
    http://www.wowza.com/forums/content....f-Wowza-Server
    http://www.wowza.com/forums/content....m-to-multicast

    Jason

  8. #8
    Join Date
    Aug 2011
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    Default

    "20 streams was fine before and now you can't stream 10..."
    I mean that erors in rtpdump, if i stream 110 channels was each 10 seconds, if i stream 20 channels, it was errors in rtpdump maybe one time in 3 minutes

    "I think you have some other issues with the server"
    But if i stream multicast on Wowza Server over VLC, it work, without freeze in the picture, without errors in rtpdump

    I have one custom module for temporary links for http, now i disable it, anyway, the same problem

  9. #9
    Join Date
    Sep 2011
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    Default

    Hi
    Are you running to instances of Wowza like I mentioned above?
    It sounds like Wowza is just too busy, splitting the 110 streams into two instances (50)/(60) will boost performance for you in this scenario.

    Jason

  10. #10
    Join Date
    Aug 2011
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    Default

    Ok! I will try

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