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Thread: Extremely High RTMP Bandwidth?

  1. #1
    Join Date
    Jun 2012
    Posts
    3

    Default Extremely High RTMP Bandwidth?

    I'm streaming videos from my Wowza server which are encoded at 1000kbps. However, streaming them to a web page with JW Player, the video is taking up as much as 16000kbps and a minimum of 5000kbps while streaming. Our users are experiencing performance issues because of bandwidth limitations and I'm curious as to why it is so high.

  2. #2
    Join Date
    Dec 2007
    Posts
    22,013

    Default

    Are you sure you are streaming one of the encoded streams? It sounds like you are streaming the source

    Richard

  3. #3
    Join Date
    Jun 2012
    Posts
    3

    Default

    We are streaming files, but (for example) one of the files is 1134 seconds (just over 19 minutes) and has a filesize of 174 MB. This should work out to 1228 kbps. Is there another file I should be streaming?

  4. #4
    Join Date
    Dec 2007
    Posts
    22,013

    Default

    Sorry, I got the (wrong) impression you were using the Transcoder... anyway, the calculation seems right. (174 * 8 / duration). Where are you getting this report of 5000kbs to 16000kbs?

    The Wowza Silverlight example will display bitrate of single stream.

    Richard

  5. #5
    Join Date
    Jun 2012
    Posts
    3

    Default

    I'm using two things:

    a) JW Player has a quality monitor:
    http://www.longtailvideo.com/support...in-users-guide

    b) I thought these numbers were really high, so I installed a windows network meter widget.
    http://i274.photobucket.com/albums/j...orkmeter-1.png
    The current largest spikes on that meter hit about 15Mbps. This may be because I'm testing on a wireless connection, but the overall datarate is about consistent with that of the JW Player's quality monitor.

    EDIT: I'll also note that we're encoding to mp4/mov files.

  6. #6

    Default

    Probably you have configured your player to download the files from your webserver via progressive download rather than being streamed by Wowza.

  7. #7

    Default

    JW Player quality monitor's bandwdth display is the players perceived available networking capacity - NOT the incoming bitrate of the stream

  8. #8

    Default

    There appears to be some confusion in that plugin page, mentioning two "widths": 720 pixels, and 480px. Usually we reference height: 480p, 720p, etc...

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