FS has 3 ways (not 2!) to handle media: 1. bypass_media=true - media path is set to run audio directly between leg a and b endpoints. absolute_codec_string variable is ignored in this mode. 2. proxy_media=true - media is proxied by FS, but without any transcoding etc, frame in - frame out. absolute_codec_string variable is ignored in this mode. 3. Neither bypass_media, no proxy_media variables are set. FS does full media handling/transcoding, absolute_codec_string variable is honored. On Monday 02 August 2010, Nyamul Hassan wrote:
Interesting. In proxy media, FS is in the middle of the media transfer, and one would think that such was possible in such situations.
In contrast, when you are not acting as a media proxy, there is little on what media the end points can negotiate among themselves.
There must be some logical reasoning that I fail to understand here.
Regards HASSAN
On Mon, Aug 2, 2010 at 14:01, Steven Ayre <steveayre@gmail.com> wrote:
Yes, don't use proxy media. Use absolute_codec_string as you already were to enforce it.
There is no way if you're using proxy media.
-Steve
On 2 August 2010 08:23, Nyamul Hassan <mnhassan@usa.net> wrote:
Thank you for the explanation Steven. However, if we see that there is a common codec, say G729, and we want to make sure that the call gets connected on G729, is there any way to enforce this?
Regards HASSAN
On Mon, Aug 2, 2010 at 12:44, Steven Ayre <steveayre@gmail.com> wrote:
In proxy media mode FS will pass media straight through without any processing. It won't do any transcoding or any SDP modifcation, so it can't transcode PCMU <-> G729 and absolute_codec_string will be ignored - it'll just pass the codec settings straight through from the A leg to the B leg.
So it's expected behaviour.
-Steve
On 2 August 2010 04:55, Dome Charoenyost <dome@tel.co.th> wrote:
Dear All, I'm not sure it's bug or not ? I try to test codec negotate. with 3 FS box FS1 send PCMA to FS2 and FS2 send G729 to FS3
FS1 -----> [PCMU] ----> FS2 ------> [G729] -------> FS3 (10.20.2.49) My dialplan <action application="bridge" data="{absolute_codec_string='G729'}sofia/internal/2222@10.20.2.49:508 0 "/> It's work fine When i try <action application="set" data="proxy_media=true"/> <action application="bridge" data="{absolute_codec_string='G729'}sofia/internal/2222@10.20.2.49:508 0 "/> Call fail. because FS2 ignore absolute_codec_string='G729' and send only PCMU (I think by pass from FS1)
It's bug or not ?
Dome C.
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