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38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
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rawplayer is a simple C applet to stream raw music files in place of mpg123
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INSTALL
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compile the .c file and install:
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gcc -O2 rawplayer.c -o /usr/bin/rawplayer
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Converting MP3 to RAW
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Make track01.mp3 into track01.raw with sox (if compiled with mp3 support).
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sox -c 1 track01.mp3 -t raw -r 8000 -c 1 -s -w track01.raw
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Otherwise, use whatever app to turn track01.mp3 into track01.wav then use sox on the wav.
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sox -c 1 track01.wav -t raw -r 8000 -c 1 -s -w track01.raw
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Once you have the raw files put them in any dir on your system (eg /var/lib/asterisk/holdmusic_raw).
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and set up a class in musiconhold.conf like so:
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[classes]
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default => custom:/var/lib/asterisk/holdmusic_raw,/usr/bin/rawplayer
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This is the most efficient way to implement moh because no cpu usage is required to
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explode the very compressed mp3 data then downsample the music to the 8khz mono on the fly
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instead the data is already stored on the disk in the format that asterisk needs it to be
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and the player does little more than pick up frames from the file and hand them to right
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to the asterisk pipe where the audio is shared into all the channels who require it.
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If you have cpu to spare and want a simple mp3 solution consider the format_mp3 from
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asterisk-addons and the files based moh.
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