[asterisk-users] Measuring audio file legth

Yuan LIU yliu11 at hotmail.com
Fri Apr 13 00:13:10 MST 2007

>From: Suity Zsolt <suich at yunord.net>
>Date: Fri, 13 Apr 2007 08:43:33 +0200
>Stephen Bosch wrote:
>>Bob Smither wrote:
>>>On Thu, 2007-04-12 at 13:28 +0200, Suity Zsolt wrote:
>>>>I have to set call length to 3min, but before hangup have to warn 
>>>>caller. There are many IVRmenu and submenu options with different 
>>>>warning audio.
>>>>I have to measure somehow the audio file length and subtract it from 3 
>>>I have not tried this, so I may be off - but do you really have to do
>>>this?  The documentation I have indicates that if there is an extension
>>>T in the context, that extension is used at the absolute timeout.  So,
>>>   exten => T,1,<play your warning message>
>>>   exten => T,n,Hangup
>>What if he wants to warn the caller with 30 seconds remaining? Then 15?
>>Then 5?
>It's not my goal this time, but good question. When a global timeout is 
>reached and jumps to the T extension, can I change the timeout 
>(Set(TIMEOUT(absolute) again) and go back somehow?
>When we dialing this isn't a problem use L option.

Two questions.  First, what is the application you are trying to limit 
duration if not Dial()?  IVR?  Second, I couldn't seem to get L to work with 
y and z.  Dial() seems to simply ignore these.  Anyone experiencing similar?

Yuan Liu

>#  L(x[:y][:z]): Limit the call to 'x' ms, warning when 'y' ms are left, 
>repeated every 'z' ms) Only 'x' is required, 'y' and 'z' are optional. The 
>following special variables are optional for limit calls: (pasted from 
>     * LIMIT_PLAYAUDIO_CALLER - yes|no (default yes) - Play sounds to the 
>     * LIMIT_PLAYAUDIO_CALLEE - yes|no - Play sounds to the callee.
>     * LIMIT_TIMEOUT_FILE - File to play when time is up.
>     * LIMIT_CONNECT_FILE - File to play when call begins.
>     * LIMIT_WARNING_FILE - File to play as warning if 'y' is defined. If 
>LIMIT_WARNING_FILE is not defined, then the default behaviour is to 
>announce ("You have [XX minutes] YY seconds").

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