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Thread: No Audio on stream

  1. #1
    Join Date
    Aug 2011
    Posts
    100

    Default No Audio on stream

    Hi
    I have two wowza servers

    CPU - 2 x XEON 5620
    RAM - 32GB
    HDD - 2 x 500GB

    Ubuntu Server 64bit 11.10

    java version "1.7.0_147-icedtea"
    OpenJDK Runtime Environment (IcedTea7 2.0) (7~b147-2.0-0ubuntu0.11.10.1)
    OpenJDK 64-Bit Server VM (build 21.0-b17, mixed mode)

    Wowza Server 3.1.0

    Wowza receive 55 rtmp streams from erlyvideo, but sometime somestreams from Wowza loose audio (only video i can see)
    if at that moment i try to play incoming stream from erlyvideo (rtmp) there is everythink is ok

    streams parameters is:

    My stream is

    Video
    ID : 69 (0x45)
    Menu ID : 1 (0x1)
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Baseline@L3.0
    Format settings, CABAC : No
    Format settings, ReFrames : 3 frames
    Codec ID : 27
    Duration : 10s 340ms
    Width : 560 pixels
    Height : 458 pixels
    Display aspect ratio : 16:9
    Frame rate : 25.000 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive

    Audio
    ID : 68 (0x44)
    Menu ID : 1 (0x1)
    Format : AAC
    Format/Info : Advanced Audio Codec
    Format version : Version 4
    Format profile : LC
    Muxing mode : ADTS
    Codec ID : 15
    Duration : 11s 455ms
    Bit rate mode : Variable / Variable
    Minimum bit rate : 111 Kbps
    Maximum bit rate : 170 Kbps
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz
    Compression mode : Lossy
    Delay relative to video : 2ms
    Language : Russian


    if i just push a few times [reset receiving stream] in streammanager, after that stream became good

    i also aded:

    <Property>
    <Name>audioIsAligned</Name>
    <Value>false</Value>
    <Type>Boolean</Type>
    </Property>
    <Property>
    <Name>videoIsAligned</Name>
    <Value>false</Value>
    <Type>Boolean</Type>
    </Property>

    but it dos not help


    What it can bee ?
    Last edited by Lelik1985; 05-08-2012 at 01:50 AM.

  2. #2
    Join Date
    Sep 2011
    Posts
    1,933

    Default

    Hi
    This happens on both servers?,
    and everything is identical to this on the other Wowza server?

    What bitrates are the video streams?, I see audio bitrate but not video.

    Does your set-up looks like this?:
    Encoder --> erlyvideo --> Wowza --> Client

    Jason

  3. #3
    Join Date
    Aug 2011
    Posts
    100

    Default

    Yes, it is happens on both servers

    Bitrate of video is 1.5 Mb

    Setup is like: Encoder --> erlyvideo --> Wowza --> Client

  4. #4
    Join Date
    Sep 2011
    Posts
    1,933

    Default

    Hi
    So you are streaming over 88Mbps from Erlyvideo to one Wowza server and the same (88Mbps) for the other Wowza server making a total of 176Mbps from the Erlyvideo server?
    Calculation based on 55 streams at 1.6Mbps (audio+video).

    Does this happen when you connect directly to the Erlyvideo server?
    Does this happen when you are only receiving 50 or 40 streams to each Wowza server?

    Is the Erlyvideo server doing anything else other than sending the 55 streams to each Wowza server? (total 110 streams)

    Jason

  5. #5
    Join Date
    Aug 2011
    Posts
    100

    Default

    No

    i have 13 transcoders
    each transcoder is transcoding 9 streams
    and each transcoder have instaled erlyvideo to send rtmp streams to Wowza

    So one erlyvideo on each transcoder only tranceive 9 streams to Wowza

    If i conect directly to Erlyvideo, i dont have any problem with stream

    I can not to shutdown 15-20 streams now on wowza because it is working server

  6. #6
    Join Date
    Sep 2011
    Posts
    1,933

    Default

    Hi
    Try adding this to see if it helps with the issue,
    http://www.wowza.com/forums/content....onitorAdvanced

    So you're not using the Wowza transcoder then if its being done at the Erlyvideo server before being sent to Wowza.

    Let me know if the above link helps

    Jason

  7. #7
    Join Date
    Aug 2011
    Posts
    100

    Default

    Hi
    At this post http://www.wowza.com/forums/content....onitorAdvanced in settings is

    <Property>
    <Name>streamMonitorAVSyncToleranceEnable</Name>
    <Value>false</Value>
    <Type>Boolean</Type>
    </Property>

    i have set streamMonitorAVSyncToleranceEnable to true ?

  8. #8
    Join Date
    Sep 2011
    Posts
    1,933

    Default

    Hi
    Yes, set up like this :

    <Property>
    <Name>streamMonitorAVSyncToleranceEnable</Name>
    <Value>true</Value>
    <Type>Boolean</Type>
    </Property>

    "Monitors the time difference between the audio and video channel of a stream. If the difference between the currently arriving
    video packet and the previous audio packet (or vice-versa) is greater than streamMonitorAVSyncTolerance and streamMonitorAVSyncToleranceEnable
    is set to true, then the stream will be considered unhealthy and will be reset."

    Jason

  9. #9
    Join Date
    Aug 2011
    Posts
    100

    Default

    I have tryed that module, but it did not help
    I found one think, if i am reseting Wowza, streams starting without audio at the begining, then if i reset stream in StreamManagere it work good

  10. #10
    Join Date
    Sep 2011
    Posts
    1,933

    Default

    Hi
    If this doesn't solve the issue then I can only assume that this is an encoder or transcoder issue.

    Have you tried playing the streams directly from the Erlyvideo server?
    If so do they have the same problems picking up video but not audio?

    Jason

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