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Thread: Issue with streaming static holding graphics in to Wowza.

  1. #1

    Default Issue with streaming static holding graphics in to Wowza.

    HI guys,

    Is there a known issue with Wowza decoding static holding graphics. ?
    My source is UDP SPTS H264 + AAC. Wowza is happy detecting the codecs, but output RTMP stream comes out black.

    I have tried several sources, including static broadcast bars and tones as a source, and all I got on the RTMP side was the tone, static bars image does not go through.

    Can you advice on possible settings I am missing?

    I am using Wowza on EC2 - Wowza Media Server 3 Perpetual Edition 3.6.2.04 build5746.

    Best regards

    Svyatko

  2. #2
    Join Date
    Dec 2007
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    Default

    Flash player wants about 60 frame before it displays h.264 video, and you are probably sending a very low FPS. The work-around is to set the NetStream.bufferLength to "0". See if that helps.

    Richard

  3. #3

    Default

    hi, just to confirm, this change applies to Application.xml ?

    thanks

    svyatko

  4. #4
    Join Date
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    Hi,
    This is done on the Flash client playing the stream.
    I assume your Flash player is embedded in a web page for you're clients to access.

    Jason

  5. #5

    Default

    Hi Jason,

    I am actually using ffmpeg to pick up the rtmp source off wowza. Setting netstream buffer to 0 is not an option in my case. What other option do i have?

    Thanks

    Svyatko

  6. #6
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    Svyatko,

    Does RTMP playback of the Wowza stream work?

    Richard

  7. #7

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    Hi Richard.

    The same behaviour in a wowza flashplayer that comes with examples.

    I have also tried OSMF with 0.5s buffer, but result was still the same.

    Regards

    Svyatko

  8. #8
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    Svyatko,

    How are you streaming the the graphic? Is there any clue in the Wowza access log when you publish or try to playback? If you enable "cupertinostreamingpacketizer" in the Application.xml /LiveStreamPacketizers Wowza will log detailed codec info when cupertino packetizing starts.

    Richard

  9. #9

    Default

    Hi Guys.

    The graphic is fed in to my SDI encoder. from there, it gets encoded as 4Mbps 1080i25 H264 @ 25fps + AAC SPTS stream, and pushed to Wowza over UDP.
    Last night I have used FFMPEG to ingest the UDP stream before it hits wowza, and that works without problems.
    Trying to pick up the same stream post Wowza, I get no video anymore, so by the look of it something is happening to the video when it gets repackaged from UDP to RTMP.

    here is what ffmpeg reports:
    source UDP:
    Input #0, mpegts, from 'udp://{ipaddress}:5004':
    Duration: N/A, start: 43455.399744, bitrate: 63 kb/s
    Program 4
    Metadata:
    service_name : test
    service_provider: none
    Stream #0:0[0x200]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x1010]: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 63 kb/s

    wowza RTMP:
    Input #0, flv, from 'rtmp://10.0.21.100/live/test.stream':
    Metadata:
    audiochannels : 2
    frameWidth : 1920
    frameHeight : 1080
    displayWidth : 1920
    displayHeight : 1080
    Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: none, 1k tbr, 1k tbn, 1k tbc
    Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp

    As to cupertinostreamingpacketizer, I don't have the need for it, so its been disabled to reduce alarms in the error logs.

    Svyatko
    Last edited by svyatko; 09-24-2013 at 01:21 AM.

  10. #10
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    Svyatko,

    Enabling cupertinostreamingpacketizer is a suggestion for debugging, there is details about the encoding of the published stream when packetizing starts that will probably be useful.

    It's not clear what you did with FFMpeg. Did you put it in between, with output to Wowza?

    Richard

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