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Thread: Re-stream from IP camera with G711_MULAW audio

  1. #1

    Default Re-stream from IP camera with G711_MULAW audio

    Hi,

    I'm re-streaming an H.264 IP camera with PCM audio through Wowza. When I view the stream in VLC from Wowza there is no audio track, but when I stream directly from the camera the audio track is present. Is the audio supposed to pass-through? I don't think I'm doing anything in my configuration to disable it.

    2013-05-03 09:27:02 EDT comment server INFO 200 - LiveStreamPacketizerCupertino.handlePacket[rtpudp/_definst/path/dlink]: Video codec:H264 isCompatible:true
    2013-05-03 09:27:02 EDT comment server INFO 200 - LiveStreamPacketizerCupertino.handlePacket[rtpudp/_definst/path/dlink]: Audio codec:G711_MULAW isCompatible:false
    2013-05-03 09:27:02 EDT comment server INFO 200 - LiveStreamPacketizerCupertino.handlePacket[rtpudp/_definst/path/dlink][avc1.66.30]: H.264 Video info: {H264CodecConfigInfo: codec:H264, profile:Baseline, level:3.0, frameSize:640x480, displaySize:640x480, frameRate:15.0}
    2013-05-03 09:27:02 EDT comment server WARN 200 - CupertinoPacketHandler.handleHolder[rtpudp/_definst/path/dlink]: Invalid video/audio codec combination for iPhone/iPod: video:H264 audio:G711_MULAW
    2013-05-03 09:27:02 EDT comment server WARN 200 - CupertinoPacketHandler.handleHolder[rtpudp/_definst/path/dlink]: Invalid audio codec for iPhone/iPod:G711_MULAW
    2013-05-03 09:27:02 EDT comment server INFO 200 - LiveStreamPacketizerCupertino.endChunkTS[rtpudp/_definst/path/dlink]: Add chunk: id:1 mode:TS[H264,G711_MULAW] a/v/k:0/0/
    2013-05-03 09:27:02 EDT comment server WARN 200 - RTPPlayer.describe: No audio packetizer[8]: G711_MULAW

    Thanks,
    Dan

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    Dan,

    G.711 is only supported in Wowza by the Transcoder for decode. The transcoded streams will have AAC audio.

    http://www.wowza.com/forums/content....live-streaming

    Testing with my axis m-1013 with audio set to "G711 -law" (which VLC shows as "PCM MU-LAW (mlaw)"), the audio is passed through to Flash clients.

    It did not work in my IPhone 4s with current iOS version, contrary to a previous test. There is no audio and logs show it is not packetized.

    Richard

  3. #3
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    To add, in my test with that camera using g.711 u-law, Wowza packetizes the audio for smoothstreaming but the Silverlight player did not play it. For sanjosestreaming, Wowza packetizes the audio and the FlashHTTPPlayer (Wowza example) plays it, as expected. So:

    RTSP: no
    Flash RTMP and HTTP: yes
    HLS: no
    Smooth: no

    Richard

  4. #4

    Default

    Thanks Richard.

    The Transcoder AddOn isn't an option for my application, so I'll proceed with audio disabled.

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