[linux-audio-dev] Radio Scanner Recorder

[Eric Dantan Rzewnicki]

On Tue, Aug 30, 2005 at 11:31:50AM -0400, Guillaume Filion wrote:
> Guillaume Filion a écrit :
> >>I'm a in the process of making a police/EMS/fire radio recorder. ...
> >>However, I started thinking and found that it would be better to have a 
> >>different file for each segment. For example, if there is
> >>- 45 seconds of speech, followed by
> >>- 3 minutes of silence,  followed by
> >>- 2 minutes of speech
> >>I would get two files, one 45 seconds long and one 2 minutes long.
> >>Does such a program allready exists, and if not, what would be the 
> >>best/easiest way of doing it?
> Hi and thanks for your responses,
> I started playing with batchrec last night with good results. The source 
> code is clean and compiled on the first try (on debian).
> I tried it on an old 200 MHz PC with 32 MB ram. I made a small perl 
> script that runs every 5 minutes from a cron job. The script runs at low 
> priority (with nice) and does some post processing on the wav files and 
> recompresses them to 16 KHz 24 Kbps Mono MP3 files.
> From time to time, I get a "Input/Output Error" from batchrec, I guess 
> this is because of the low system ressources. It might be a good idea to 
> do the post processing on another PC.
> I'm not really familiar with jack, I took a look at the documentation 
> but I would have to invest more time to get something out of it. For 
> now, batchrec does the job pretty well. One thing that I would like to 
> do would be to use a low pass filter because my scanner seems to emit 
> some low frequency sounds that are louder than some parts of the 
> conversations. If I understand jack correctly, it would allow me to plug 
> a low pass filter in front of the recording program easily.

You mean a high pass filter, right?

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Eric Dantan Rzewnicki  |  Systems Administrator
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