[asterisk-users] play alaw file with .wav extension
Hi all, I have to play a alaw file with .wav ext. How can I do this? -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
_ From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Quy Pham Sy Subject: [asterisk-users] play alaw file with .wav extension I have to play a alaw file with .wav ext. How can I do this? Use the asterisk convert command or SOX. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Hi, The files are actually alaw file (i check by file command). they're, however, named with .wav extension, and these file are inherented with current system I'm not allow to change these. Quy On Wed, Jul 21, 2010 at 8:12 PM, Danny Nicholas da...@debsinc.com wrote: -- *From:* asterisk-users-boun...@lists.digium.com [mailto: asterisk-users-boun...@lists.digium.com] *On Behalf Of *Quy Pham Sy *Subject:* [asterisk-users] play alaw file with .wav extension I have to play a alaw file with .wav ext. How can I do this? Use the asterisk “convert” command or SOX. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Asterisk won't be happy trying to play foobar.wav if it is actually a .alaw file. Since you can't rename the existing files, there's no law that says you can't copy them and play them correctly.Assuming that your calls are using the alaw codec, this snippet would do the trick Exten = 1234,1,answer Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) Exten = 1234,n,playback(/tmp/foobar) Exten = 1234,n,System(/bin/rm /tmp/foobar.alaw) -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
On 07/21/2010 04:35 PM, Danny Nicholas wrote: Asterisk won’t be “happy” trying to play foobar.wav if it is actually a .alaw file. Since you can’t rename the existing files, there’s no law that says you can’t copy them and play them correctly.Assuming that your calls are using the alaw codec, this snippet would do the trick Exten = 1234,1,answer Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) Exten = 1234,n,playback(/tmp/foobar) Exten = 1234,n,System(/bin/rm /tmp/foobar.alaw) No, that won't work either, because a WAV file has a header, and a raw alaw file does not... so Asterisk will try to play the contents of that header as alaw data, presumably producing terrible noise. The best you can do is to use sox to convert them from alaw-in-WAV-container to raw-alaw. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kflem...@digium.com Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) it actually works, I made a link to the .wav file instead of copying it ln -s foobar.wav foobar.alaw, and it works well. No, that won't work either, because a WAV file has a header, and a raw alaw file does not... so Asterisk will try to play the contents of that header as alaw data, presumably producing terrible noise. My .wav files are alaw file indeed. Here is the output from file command $file 53.wav 53.wav: RIFF (little-endian) data, WAVE audio, ITU G.711 A-law, mono 8000 Hz they've just named as xxx.wav so I guess there is no problems with copying or linking solutions. Thanks all, On Wed, Jul 21, 2010 at 9:50 PM, Kevin P. Fleming kpflem...@digium.comwrote: On 07/21/2010 04:35 PM, Danny Nicholas wrote: Asterisk won’t be “happy” trying to play foobar.wav if it is actually a .alaw file. Since you can’t rename the existing files, there’s no law that says you can’t copy them and play them correctly.Assuming that your calls are using the alaw codec, this snippet would do the trick Exten = 1234,1,answer Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) Exten = 1234,n,playback(/tmp/foobar) Exten = 1234,n,System(/bin/rm /tmp/foobar.alaw) No, that won't work either, because a WAV file has a header, and a raw alaw file does not... so Asterisk will try to play the contents of that header as alaw data, presumably producing terrible noise. The best you can do is to use sox to convert them from alaw-in-WAV-container to raw-alaw. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kflem...@digium.com Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Quy Pham Sy qu...@vega.com.vn writes: they've just named as xxx.wav so I guess there is no problems with copying or linking solutions. You're simply lucky that the header is short enough to not sound too bad. /Benny -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
1. Sometimes it's ok to be lucky 2. my SOX (1.14.0) on CENTOS doesn't handle alaw files. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Un-top-posting and trying to regurgitate into a cohesive thread... On Wed, 21 Jul 2010, Quy Pham Sy wrote: I have to play a alaw file with .wav ext. How can I do this? On Wed, 21 Jul 2010, Danny Nicholas wrote: Asterisk won’t be “happy” trying to play foobar.wav if it is actually a .alaw file. Since you can’t rename the existing files, there’s no law that says you can’t copy them and play them correctly. Assuming that your calls are using the alaw codec, this snippet would do the trick Exten = 1234,1,answer Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) Exten = 1234,n,playback(/tmp/foobar) Exten = 1234,n,System(/bin/rm /tmp/foobar.alaw) On Wed, 21 Jul 2010, Kevin P. Fleming wrote: No, that won't work either, because a WAV file has a header, and a raw alaw file does not... so Asterisk will try to play the contents of that header as alaw data, presumably producing terrible noise. The best you can do is to use sox to convert them from alaw-in-WAV-container to raw-alaw. On Wed, 21 Jul 2010, Quy Pham Sy wrote: Exten = 1234,n,System(/bin/cp foobar.wav /tmp/foobar.alaw) it actually works, I made a link to the .wav file instead of copying it ln -s foobar.wav foobar.alaw, and it works well. My .wav files are alaw file indeed. Here is the output from file command $file 53.wav 53.wav: RIFF (little-endian) data, WAVE audio, ITU G.711 A-law, mono 8000 Hz they've just named as xxx.wav so I guess there is no problems with copying or linking solutions. It only appears to be working because you can't hear the problem. Your files are not mis-named, they are formatted in a way that Asterisk doesn't handle. Asterisk understands A-LAW encoding, just not when it's in a WAV container. (There is no such thing as an alaw file. You may be thinking of a raw (header-less) file containing A-LAW encoded data.) By tricking Asterisk into playing the file as a header-less file, Asterisk is processing the WAV header as A-LAW encoded data. A WAV file has a 44 byte header. An A-LAW sample is 1 byte (not real sure about that). The sample rate is 8,000 per second. The 44 samples are played in about 1/200th of a second so you don't hear the noise at the beginning of the file. You can create an A-LAW in WAV file using: sox\ /var/lib/asterisk/sounds/demo-congrats.wav\ -A\ -t wav\ alaw-in-wav.wav If you extract the header using: dd\ bs=44\ count=1\ if=alaw-in-wav.wav\ of=header.wav And then concatenate a bunch of them: for ((IDX = 0; IDX 200; ++IDX)) do cat header.wav done noise.alaw And then convert this into a more normal WAV file: sox -t al noise.alaw -s -w noise.wav You can play this in most audio players and hear about 1 second of a not too annoying buzz. The proper way to handle this would be to enhance format_wav.c/format_wav_gsm.c to handle A-LAW encoded data. Another approach would be to write an AGI (playback-alaw-in-wav?) to wrap the create a link, play the file, delete the link band-aid. You could do in dialplan, I just prefer writing code where I have more flexibility and better error handling. -- Thanks in advance, - Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000-- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
Hi! 2. my SOX (1.14.0) on CENTOS doesn't handle alaw files. It surely does, only that you need to tell it explicitely to: Use -t ul or -t al and you are fine. Philipp -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] play alaw file with .wav extension
On Wed, 21 Jul 2010, Danny Nicholas wrote: 2. my SOX (1.14.0) on CENTOS doesn't handle alaw files. Do you mean read or write? Do you mean a raw (header-less) file containing A-LAW encoded data or A-LAW encoded data in a WAV formatted file? While some of the options are a bit obtuse (like silence), sox should have enough command line options to handle just about any format and any encoding. -- Thanks in advance, - Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000 -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
