Anyone using Opus?

[bcmike]

I have a colleague trying to convince me its a good idea, and it looks good on paper but G722 seems to be winning as a wide band codec.

Anyone have any practical experience with Opus?

 

[ad5ou]

G722 is older than Opus which is why you may perceive it as winning.
Opus is far superior.
A little more about Opus

 

[bcmike]

LOL thats the article that prompted us to investigate it. Thanks!

We'll probably go in that direction and report back the gritty details.

 

[bcmike]

Looks like transcoding is going to be the deal killer here. Initial tests indicate an unacceptable CPU hit going from Opus to G711.

While some carriers are providing Opus support, most aren't yet. Since we don't want to be on the hook for transcoding we'll need to stick with G711

 

[smn]

Looks like transcoding is going to be the deal killer here. Initial tests indicate an unacceptable CPU hit going from Opus to G711.

While some carriers are providing Opus support, most aren't yet. Since we don't want to be on the hook for transcoding we'll need to stick with G711

Yes, it's very hard on CPU resources.

 

[bcmike]

Are there any transcoder cards fro OPUS?

 

[smn]

I doubt it. Your best bet is to use a phone and SIP provider that can both use it natively which is a difficult combination to find. For sound files, try use sln16 formatted files. I think that will reduce the transcoding overhead somewhat when playing sound files but I have not done much testing. I just know that the CPU load is pretty high going to/from G711. Not a big deal for one or two simultaneous calls. But a very big deal if you have lots of them.

 

[Dan]

The last two releases of Opus have seen double digit performance improvements in transcoding, iirc Freeswitch & ffmpeg are compiled with fairly old versions of libopus.