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Visualization of Audio from live RTMP video stream.

Aug 16, 2012 8:35 PM

I have a need to do basic remote monitor video is presant and levels of audio.


I had hoped to used

but it seems to be incompatable with live streams.


the VU level requirement is basic of that there is an live audio feed and does not need to be fancy at all.


We currently use JWPlayer but am not tied to it for this project.


Cheers for the help



  • Currently Being Moderated
    Aug 17, 2012 6:32 AM   in reply to TechnoLemming

    Have you tried the computeSpectrum() method of the Sound class? Since flash V9.x it can compute the spectrum on RTMP. The link to the API has a full example that makes a waveform. It computes a value from -1.0 to 1.0 for 512 values, 256 for the left and 256 for the right channels.


    You can bundle them in blocks and use the data to compute your audio levels. Just bundle a bunch of values and make one bar that displays the average of the values to simplify it. e.g. 4 bars uses the average of the values from 0-64, 65-128, 129-192, 193-256 for the left channel.. You get the idea.


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