Asterisk sound files: Difference between revisions
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Brian Wilson (talk | contribs) Created page with "If you copy a generic WAV file into /var/lib/asterisk/sounds and try to play it you might see this: [2017-08-19 09:09:25] WARNING[3667][C-00000002]: format_wav.c:113 check_he..." |
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If you copy a generic WAV file into /var/lib/asterisk/sounds and try to play it you might see this: | If you copy a generic WAV file into /var/lib/asterisk/sounds and try to play it you might see this: | ||
[2017-08-19 09:09:25] WARNING[3667][C-00000002]: format_wav.c:113 check_header_fmt: Unexpected frequency mismatch 11025 (expecting 8000) | [2017-08-19 09:09:25] WARNING[3667][C-00000002]: format_wav.c:113 check_header_fmt: Unexpected frequency mismatch 11025 (expecting 8000) | ||
[2017-08-19 09:09:25] WARNING[3667][C-00000002]: file.c:468 fn_wrapper: Unable to open format wav | [2017-08-19 09:09:25] WARNING[3667][C-00000002]: file.c:468 fn_wrapper: Unable to open format wav | ||
You have to convert it. | You have to convert it. | ||
== Conversion == | |||
The input file can be any format as long as sox can read it. | The input file can be any format as long as sox can read it. | ||
| Line 17: | Line 19: | ||
Some options | Some options | ||
-r 8000 samples per second | -r 8000 samples per second | ||
-e signed-integer | -e signed-integer | ||
-b 16 bits per sample | -b 16 bits per sample | ||
-c 1 one channel | -c 1 one channel | ||
-t raw just a raw audio file, no header | -t raw just a raw audio file, no header | ||
=== Convert to WAV for Asterisk === | |||
sox infile.wav -r 8000 -e signed-integer -b 16 -c 1 outfile.wav | sox infile.wav -r 8000 -e signed-integer -b 16 -c 1 outfile.wav | ||
=== Convert to ULAW === | |||
rasterisk -x "file convert bdb-login.wav vm-login.ulaw" | rasterisk -x "file convert bdb-login.wav vm-login.ulaw" | ||
=== Convert to SLN === | |||
Basically the same format without a header | Basically the same format without a header | ||
sox SilentCity.mp3 -t raw -r 8000 -e signed-integer -b 16 -c 1 SilentCity.sln | sox SilentCity.mp3 -t raw -r 8000 -e signed-integer -b 16 -c 1 SilentCity.sln | ||
[[Category: | [[Category: Telephones]] | ||
Latest revision as of 15:48, 31 August 2022
If you copy a generic WAV file into /var/lib/asterisk/sounds and try to play it you might see this:
[2017-08-19 09:09:25] WARNING[3667][C-00000002]: format_wav.c:113 check_header_fmt: Unexpected frequency mismatch 11025 (expecting 8000) [2017-08-19 09:09:25] WARNING[3667][C-00000002]: file.c:468 fn_wrapper: Unable to open format wav
You have to convert it.
Conversion
The input file can be any format as long as sox can read it. The parameters convert from any format to one that Asterisk can use.
GSM format sounds bad so I avoid it. Usually I keep the files in WAV format and let Asterisk transcode them. On a heavily loaded or small server it might make sense to keep them in ULAW or SLIN format instead????
You can install several formats for each file and let Asterisk choose, too.
Some options
-r 8000 samples per second -e signed-integer -b 16 bits per sample -c 1 one channel -t raw just a raw audio file, no header
Convert to WAV for Asterisk
sox infile.wav -r 8000 -e signed-integer -b 16 -c 1 outfile.wav
Convert to ULAW
rasterisk -x "file convert bdb-login.wav vm-login.ulaw"
Convert to SLN
Basically the same format without a header
sox SilentCity.mp3 -t raw -r 8000 -e signed-integer -b 16 -c 1 SilentCity.sln
