[asterisk-dev] Asterisk tries to transcode vp8 <> g729

Joshua C. Colp jcolp at sangoma.com
Sun Jul 5 13:10:15 CDT 2020


On Sun, Jul 5, 2020 at 12:04 PM Dennis Buteyn <dennis.buteyn at xorcom.com>
wrote:

> Any good reason why Asterisk thinks transcoding audio to video and vice
> versa is possible?
>
> Capabilities: us - (vp8|g729), peer -
> audio=(g729)/video=(vp8)/text=(nothing), combined - (vp8|g729)
> Non-codec capabilities (dtmf): us - 0x1 (telephone-event|), peer - 0x1
> (telephone-event|), combined - 0x1 (telephone-event|)
> [2020-07-05 13:25:53] WARNING[2295][C-00000028]: channel.c:5850
> set_format: Unable to find a codec translation path: (vp8) -> (g729)
> [2020-07-05 13:25:53] WARNING[2295][C-00000028]: channel.c:5850
> set_format: Unable to find a codec translation path: (g729) -> (vp8)
>

The legacy way of storing format information combines all types together,
which can result in code mistakenly trying to set up such translation
paths. Entirely possible that there is a bug somewhere where the video is
not eliminated.

-- 
Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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