[Twisted-Python] PyMedia & Tk - based mp3 sound recorder

Jp Calderone exarkun at divmod.com
Mon Nov 29 11:10:21 EST 2004

On Mon, 29 Nov 2004 16:55:42 +0200, Petri Savolainen <petri.savolainen at iki.fi> wrote:
>I've tried to write a simple sound recorder for python. Basically, it 
> just reads sound from mic or line in, and encodes it to mp3 on the fly. 
> See http://pymedia.org/tut/src/voice_recorder.py.html for a simple 
> example I've taken the pymedia recorder code from. Works nicely - but no 
> GUI etc. of course.
> I've added a very simple Tk-base GUI using twisted, using 
> task.LoopingCall to drive the recorder loop that reads chunks data from 
> sound device and encodes them.
> The problem is that the sound is now garbled - it sounds as if the loop 
> is not fast enough or it's dropping some sound data. Apart from twisted 
> and Tk integration, the code should be essentially the same as the 
> original example that works fine.
> I''ve tried with different task looping frequencies and even added Psyco 
> optiomization to the code, and all this has made but tiny difference 
> -and my PC is an AMD 2400+ with plenty of memory so I would think speed 
> is not the issue here; the encoding preferences are mono, 22050Hz and 
> 64kbit/s.

  You may want to look at how Shtoom gets its audio input.  It uses Twisted and seems to have audio handling down pretty well.



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