[BUG] Error sending audio via Chatwoot + Evolution API + WhatsApp Official API (unsupported MIME type audio/opus)

[kleberit]

📋 Bug Description

When using the Evolution API with the official WhatsApp API, integrated into Chatwoot, sending an audio file from Chatwoot to a contact triggers an error in the container logs.

"details": "Unsupported Audio mime type audio/opus. Please use one of audio/ogg; codecs=opus, audio/mpeg, audio/amr, audio/mp4, audio/aac."

🔄 Steps to Reproduce

Integrate Chatwoot with the official WhatsApp API via Evolution API.

Send an audio message from Chatwoot to any contact.

Check the container logs.

Expected behavior:
The audio file should be delivered to the contact without errors.

Actual behavior:
The audio fails to send, and the logs show an unsupported MIME type error (audio/opus).

Environment:

Chatwoot version: 3.14.1

Evolution API version: 2.3.4

WhatsApp API: Official Meta API

Deployment: [Docker]

Additional context:
It looks like Chatwoot (or Evolution API) is sending audio in audio/opus format, which is not accepted by the WhatsApp API. The API only supports the following formats:

audio/ogg; codecs=opus

audio/mpeg

audio/amr

audio/mp4

audio/aac

A possible fix could be adding a conversion step before sending, or handling the audio format compatibility.

✅ Expected Behavior

Please use one of audio/ogg; codecs=opus, audio/mpeg, audio/amr, audio/mp4, audio/aac.

❌ Actual Behavior

audio/opus

🌍 Environment

• OS: [e.g. Ubuntu 20.04, Windows 10, macOS 12.0]
• Node.js version: [e.g. 18.17.0]
• Evolution API version: [e.g. 2.3.4]
• Database: [e.g. PostgreSQL 14, .0]
• Connection type: [e.g. WhatsApp Business API]

📋 Logs

"details": "Unsupported Audio mime type audio/opus. Please use one of audio/ogg; codecs=opus, audio/mpeg, audio/amr, audio/mp4, audio/aac."

📝 Additional Context

No response