Remco Barende wrote:
On Mon, 20 Dec 2004, Eric Wieling aka ManxPower wrote:

Remco Barende wrote:

Hi list!

Just wondering, why is * sticking with an mpg123 version from the stoneage?

Gentoo comes with 0.59s-r8 and this version doesn't even start.

Ik know I could forcibly unmerge mpg123 and install the old version but I guess some day newer versions will have to be supported?


Asterisk sets the following mpg123 options:

"mpg123 -q -s --mono -r 8000 -b 2048 -f 4096"

-q, --quiet  Quiet.  Suppress diagnostic messages.

-s, --stdout The decoded audio samples are written to standard output, instead of playing them through the audio device. This option
must be used if your audio hardware is not supported by mpg123.
The output format is raw (headerless) linear PCM audio data, 16
bit, stereo, host byte order.


-r rate, --rate rate Set sample rate (default: automatic). You may want to change this if you need a constant bitrate independed of the mpeg stream rate. mpg123 automagically converts the rate. You should then combine this with --stereo or --mono.

-b size, --buffer size Use an audio output buffer of size Kbytes. This is useful to bypass short periods of heavy system activity, which would normally cause the audio output to be interrupted. You should specify a buffer size of at least 1024 (i.e. 1 Mb, which equals about 6 seconds of audio data) or more; less than about 300 does not make much sense. The default is 0, which turns buffering off.

-f factor, --scale factor  Change scale factor (default: 32768).

Pretty much any program that accepts these options to generate raw (headerless) linear PCM audio data, 16 bit, mono, host byte order, at 8khz to stdout will work. At this time the only one that does this that I know is mpg123 0.59r


Thanks! But when I look at the output of mpg123 0.59s-r8 all these commandline switches are still supported, why it it only the old version that is supported, not the newer ones?

If all the options are supported then there is no reason that it would not work.


Try this command at the command line:

mpg123 --mono -r 8000 -b 2048 -f 4096 /var/lib/asterisk/mohmp3/*.mp3

Does it play via the speakers? If not then there is no way it will work with Asterisk.

You can also try all on one line, this won't require speakers on your system:

mpg123 -s --mono -r 8000 -b 2048 -f 4096 /var/lib/asterisk/mohmp3/*.mp3 > /dev/null


Asterisk just calls mpg123 with specific parameters. It does no checking whatsoever of the mpg123 version.



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