Audio waveform

[Dave Mateer]

I'm new to gstreamer, and hoping someone can point me in the right direction. I need to provide a waveform image of audio (voice recordings) in my application. I can see how to sample the "level" plugin to get a volume form (this, I think, is what Jokoshur is doing), but wasn't sure what plugin would provide the data to draw my own waveform that shows frequency, amplitude, etc. I have looked briefly at the following plugins, but there's just not enough information to know what they do for sure:

 - monoscope: unless the documentation is severely absent, there are no options to configure the output.
 - waveformsink: doesn't look like what I need, although perhaps it might play a part in a larger solution.
 - wavenc: again, perhaps this might be part of a solution?

Thanks for your help!

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[Stefan Sauer]

Dave Mateer wrote:
> I'm new to gstreamer, and hoping someone can point me in the right direction. I need to provide a waveform image of audio (voice recordings) in my application. I can see how to sample the "level" plugin to get a volume form (this, I think, is what Jokoshur is doing), but wasn't sure what plugin would provide the data to draw my own waveform that shows frequency, amplitude, etc. I have looked briefly at the following plugins, but there's just not enough information to know what they do for sure:
>
>  - monoscope: unless the documentation is severely absent, there are no options to configure the output.
>  - waveformsink: doesn't look like what I need, although perhaps it might play a part in a larger solution.
>  - wavenc: again, perhaps this might be part of a solution?
>
> Thanks for your help!
>  
In buzztard I load the waveforms to memory and have a gtk-widget that
draws the waveform:
http://www.buzztard.org/index.php/File:Bt-edit-0.4.0-02.png

I have a memory audiosrc to replay the audio from memory.
http://buzztard.svn.sourceforge.net/viewvc/buzztard/trunk/buzztard/src/ui/edit/btmemoryaudiosrc.c?view=markup

Simillar thing could be done for a sink.

Stefan

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