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Thread: VOD audio bitrate

  1. #1
    Join Date
    Sep 2013
    Posts
    4

    Default VOD audio bitrate

    how can i adjust bitrate of a mp3 track to 32k,64k ?
    i have uploaded 1 mp3 file to /usr/local/Wowza/content/sample.mp3
    i have checked with VLC player rtsp://ip:1935/vod/mp3:sample.mp3
    its not streaming smoothly also i checked with testplayers it shows bitrate 250+k may be that is the reason why its not playing smoothly?

  2. #2
    Join Date
    Jun 2011
    Posts
    1,037

    Default

    Hi,
    You can't adjust the bitrate with any server-side settings.
    You could certainly try re-encoding it with ffmpeg like this to see if playback improves:
    ffmpeg -i sample.mp3 -ab 64k sample_64k.mp3
    Daren

  3. #3
    Join Date
    Sep 2013
    Posts
    4

    Default

    Quote Originally Posted by daren_j View Post
    Hi,
    You can't adjust the bitrate with any server-side settings.
    You could certainly try re-encoding it with ffmpeg like this to see if playback improves:
    ffmpeg -i sample.mp3 -ab 64k sample_64k.mp3
    Daren
    what is the use of .smil ?

  4. #4
    Join Date
    Jun 2011
    Posts
    1,037

    Default

    Hi,
    You would use a .smil file to support different viewers/listeners bandwidth conditions,
    This is also know as multiple bitrate or Adaptive Bitrate (ABR) support.
    You would specify different file renditions in the .sml file to support different bitrates.
    A file has to exist for each of the required bitrates.
    This is explained in more detail in this article.

    Daren

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