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mattdfong at gmail.com
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 Posted: Wed Oct 28, 2009 11:46 am Post subject: [Freeswitch-users] Determining Frame Size |
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I noticed that the wait_for_silence's <silence_hits> <listen_hits> use number of frames as base values (rather than seconds or milliseconds). I'd like to wait for 5 seconds of consistent silence, but I'm wondering how I can determine the sample rate (and thus frames per second) for an existing call. Is there a variable I can read? Thanks.
--matt |
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chris at cloudtel.com
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| Posted: Thu Oct 29, 2009 10:44 am Post subject: [Freeswitch-users] Determining Frame Size |
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Depends on your codec. Frame size = ptime. So it can vary from call to call,
but most you will find it to be 20ms.
So if we are using speex-wb at 20ms, each frame is 0.02 seconds long. 50
frames = 1 second of sound.
On October 28, 2009 12:37:56 pm Matthew Fong wrote:
| Quote: | I noticed that the wait_for_silence's <silence_hits> <listen_hits> use
number of frames as base values (rather than seconds or milliseconds). I'd
like to wait for 5 seconds of consistent silence, but I'm wondering how I
can determine the sample rate (and thus frames per second) for an existing
call. Is there a variable I can read? Thanks.
--matt
|
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