# Multicast publisher dont work correctly! **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [January 28, 2012, 5:53pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187 "2012-01-28T17:53:36Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [January 28, 2012, 5:53pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/1 "2012-01-28T17:53:36Z")
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? ---
**Author:** ![Randall\_Auriemma](https://avatars.discourse-cdn.com/v4/letter/r/85e7bf/32.png) [@Randall\_Auriemma](https://community.wowza.com/u/Randall_Auriemma)\ **Post date:** [January 28, 2012, 7:55am UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/2 "2012-01-28T07:55:49Z")
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… ---
**Author:** ![Randall\_Auriemma](https://avatars.discourse-cdn.com/v4/letter/r/85e7bf/32.png) [@Randall\_Auriemma](https://community.wowza.com/u/Randall_Auriemma)\ **Post date:** [March 12, 2012, 12:16am UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/3 "2012-03-12T00:16:18Z")
Lelik1985, You said: “i have record multicast over dumprtp localy (on the Wowza) multicast not freezing, no cubes in the picture” and “i conected wowza directly to network card of another server, the same problem” Can you explain a little more? What is different about the second scenario? Are you recording in the second case? Can you go back to the first working case? Maybe if you specify the exact steps to replicate the problem it will help. ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [January 28, 2012, 10:17pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/4 "2012-01-28T22:17:19Z")
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™ SE Runtime Environment (build 1.6.0\_26-b03) Java HotSpot™ 64-Bit Server VM (build 20.1-b02, mixed mode) ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [January 31, 2012, 2:35pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/5 "2012-01-31T14:35:07Z")
What information you need more? And i have test, if i stream 20 strams, multicast workingperfect, if i stream 110 streams, multicast is freezing ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [February 2, 2012, 12:58pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/6 "2012-02-02T12:58:13Z")
I have done what is on this tuning guide [https://www.wowza.com/forums/content…ormance-Tuning](https://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? ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [February 2, 2012, 2:36pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/7 "2012-02-02T14:36:42Z")
“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 ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [February 2, 2012, 3:05pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/8 "2012-02-02T15:05:45Z")
Ok! I will try ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [March 11, 2012, 8:18pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/9 "2012-03-11T20:18:06Z")
Hi! I have split my 110 streams on two instances of Wowza and it help, i have record multicast over dumprtp localy (on the Wowza) multicast not freezing, no cubes in the picture, but if i try to record stream on network pc (thru switch), then i have problem, picture is freezing, cubes,…! First i thought that it is problem on the switch, i conected wowza directly to network card of another server, the same problem I have tested on two instances of Wowza and 4 another servers, the same problem What it can be? May be on wowza is some bufer for outgoing multicast, or somethink else? Thank for help! ---
**Author:** ![Alexsey\_Kasianenko](https://avatars.discourse-cdn.com/v4/letter/a/e36b37/32.png) [@Alexsey\_Kasianenko](https://community.wowza.com/u/Alexsey_Kasianenko)\ **Post date:** [March 16, 2012, 2:54am UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/10 "2012-03-16T02:54:26Z")
I an using WowzaMediaServer-3.0.5 pacth2 on server: 2xXEON E5620, RAM-32GB, 2x1G Network Interfaces, Linux Ubuntu 64bit Server Edition, java version “1.7.0” Java™ SE Runtime Environment (build 1.7.0-b147) Java HotSpot™ 64-Bit Server VM (build 21.0-b17, mixed mode) I am receiving 60 rtmp streams on this server, streams is 1,5Mb bitrait Everythink working well, but i need multicast i have setup multicast publish module if i am trying to record one of 60 multicast streams localy on Wowza via dumprtp, no problem If i a trying record one of 60 multicast streams thru network, picture is freezing i have connected lan card of Wowza server (where is multicast) directly to lan card of one of my servers, then i tried to record one of multicast on this server, picture is freezing I have changed patch cords 3 times, i tried to connect via crossover cable, same result I also tried to stream only 20 multicast groups, it work well, but if i am streaming 30,40,50 streams, picture became freezing ---
**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\ **Post date:** [January 31, 2012, 12:55pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/11 "2012-01-31T12:55:05Z")
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, [https://www.wowza.com/docs/how-to-do-performance-tuning](https://www.wowza.com/docs/how-to-do-performance-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 ---
**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\ **Post date:** [February 2, 2012, 11:45am UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/12 "2012-02-02T11:45:41Z")
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, [https://www.wowza.com/docs/how-to-get-rtppusher-addon-multicast-and-unicast-streams-to-udp-and-rtsp](https://www.wowza.com/docs/how-to-get-rtppusher-addon-multicast-and-unicast-streams-to-udp-and-rtsp) [https://www.wowza.com/docs/how-to-get-multicastpublish-addon-multicast-and-unicast-streams-to-udp-and-rtsp](https://www.wowza.com/docs/how-to-get-multicastpublish-addon-multicast-and-unicast-streams-to-udp-and-rtsp) Jason ---
**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\ **Post date:** [February 2, 2012, 12:59pm UTC](https://community.wowza.com/t/multicast-publisher-dont-work-correctly/37187/13 "2012-02-02T12:59:48Z")
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