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Thread: Stereo audio - possible to publish only one channel?

  1. #1
    Join Date
    Apr 2011
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    2

    Default Stereo audio - possible to publish only one channel?

    Hello,

    ever since my company uses Wowza, I get all kinds of "is-this-possible?" type questions from our project managers, since it is so flexible ... here is one I could not find an answer to in the documentation:

    If I have a single live video input with stereo audio for wowza, can I publish a stream with only one of both stereo channels?

    The background is that the stereo channels contain different signals altogether and shall be delivered separate as mono audio, like this:

    (input) video+ch1+ch2 --> Magic Wowza Box --> (output1) video+ch1; (output2) video+ch2;

    Can Wowza do this?

    Best regards.
    Marcel

  2. #2

    Default

    With Wowza you can select different audio "tracks" from an MP4, but not different left/right channels from a single stereo track.

    It can be probably be done with ffmpeg:
    ffmpeg -i IN_STREAM -map_channel 0.0.0 OUTPUT_CH0 -map_channel 0.0.1 OUTPUT_CH1

  3. #3
    Join Date
    Apr 2011
    Posts
    2

    Default

    Thank you for this information Randall.

    Best regards.
    Marcel

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