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OPUS AMR
Not possible

Convert OPUS to AMR

Can you convert OPUS to AMR?
Verified by Adam B.· reviewed by FE Editorial ·updated Jul 26, 2026
QUICK ANSWER
Is it possible to convert OPUS to AMR?
No - not a direct conversion.

Convert your .opus file to .mp3 or .wav instead. AMR is a 2G/3G telephony codec encoding audio at 8 kHz; the quality loss from Opus is severe and permanent, and the resulting file cannot be played on any mainstream OS without additional software.

No direct path
Also to AMR: AWB · AIF · 3GA

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert OPUS to AMR?

AMR (Adaptive Multi-Rate) is a compressed speech codec introduced by 3GPP in 1999 for 2G/3G mobile networks, operating at 4.75-12.2 kbit/s at narrowband 8 kHz quality. Opus, standardized in 2012, operates at up to 48 kHz with clearly better fidelity. Forcing Opus audio through AMR permanently discards most of its information, and the resulting .amr file plays on nothing outside legacy telephony infrastructure. The sensible alternatives are .mp3 or .wav.

How to convert OPUS to AMR

VLC FREE

Open VLC, go to Media > Convert/Save, add the .opus file, and choose MP3 or WAV as the output format - not AMR.

foobar2000 FREE

Right-click the .opus file in foobar2000's playlist and choose Convert; select MP3 or WAV as the destination format.

About these formats

.OPUS Opus Audio File (Ogg Opus)

An OPUS file is compressed audio in the royalty-free Opus codec, and most people run into one as a WhatsApp or Telegram voice message saved to disk. VLC media player plays it free on…

Open .OPUS details →
.AMR Adaptive Multi-Rate (AMR) audio

An AMR file is a compressed speech recording in the Adaptive Multi-Rate format, the voice codec used in GSM and 3G phones. Open it with VLC media player (free, all platforms). To use it in…

Open .AMR details →

Quality & what to watch

  • AMR encodes at 8 kHz narrowband; converting from Opus to AMR permanently discards most audio information and the result sounds noticeably worse.
  • Windows, macOS, iOS, and Android do not open .amr files natively - you would need to convert again to play the result anywhere.
  • The only situation where AMR output is justified is a legacy telephony gateway with no alternative input format.

Frequently asked questions

Why does ffmpeg support OPUS to AMR if the result is so poor?
ffmpeg targets complete codec coverage including legacy telephony systems; support does not mean the result is useful or widely compatible.
Is there a difference between AMR and AMR-WB?
Yes - AMR (AMR-NB) encodes at 8 kHz; AMR-WB encodes at 16 kHz and sounds better, but neither is a sensible target for modern Opus audio.
What if I just need to transcribe the voice message?
Skip conversion; use a speech-to-text tool that accepts .opus or .wav directly, such as OpenAI Whisper.