Unable to find codec translation path between ulaw and opus

[Siam456]

When running Asterisk inside Docker, bridging a SIP call between an internal extension (ulaw) and a LiveKit endpoint (opus) fails due to a missing codec translation path.

The same setup works correctly when Asterisk is built manually on Ubuntu (non-Docker) — after enabling the Opus codec using make menuselect.

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Logs

WARNING[34]: channel.c:5656 set_format: Unable to find a codec translation path: (ulaw) -> (opus)
WARNING[34]: channel.c:5656 set_format: Unable to find a codec translation path: (opus) -> (ulaw)
ERROR[116]: channel.c:6646 ast_channel_make_compatible_helper: No path to translate

Note
This issue appears to be specific to the Docker image — it might not include the Opus codec module by default.
When Asterisk is built manually on Ubuntu, enabling the Opus codec via make menuselect resolves the issue.

[andrius]

Hello, currently opus is not included - historically we all used to download a module from asterisk site, but it's CPU architecture specific. Soon I'll have it, but temporally you might create your own dockerfile with andrius/asterisk base

http://downloads.digium.com/pub/telephony/codec_opus

[andrius]

In which version have.you found issue? Did you tested g711 (ulaw) with the livekit? I did, it worked for me