AV1 to AMR Converter

Convert AV1 to AMR: Read This First

This page converts an .av1 file to .amr, the speech codec used by mobile voice recorders. There are two catches worth knowing before you upload, and both are honest limits of the formats — not bugs in the tool. First, a bare .av1 file is a raw AV1 video bitstream that holds picture only, with no audio track inside it, so extracting sound from it usually gives a silent or empty AMR. Second, even when you do have audio, AMR is a narrowband speech codec built for human voice — it samples at 8 kHz and tops out around 12.2 kbps, so music and anything but talking will sound muffled. If you actually want a soundtrack, you almost certainly need to start from the container file, not the raw stream. Here is how.

How to Convert AV1 to AMR

1. Upload Your AV1 File: Drag and drop your .av1 onto the page, or click "+ Add Files" to browse. You can queue several files and convert them in one batch with the same settings.
2. Pick the AMR Band and Bitrate: Open Advanced Options. AMR-NB (narrowband) is the default and matches phone voice recordings; its bitrate runs from 4.75 to 12.2 kbps. Use Preset for a quick quality choice, or Constant Bitrate to pin an exact rate.
3. Set Audio Channel, Sample Rate, or Trim (Optional): Audio Channel defaults to Mono and Audio Sample Rate to 8000 Hz — the native AMR-NB layout, so leave them unless you have a reason. Use Trim (default "Unchanged") to export only a start-and-duration window.
4. Convert and Download: Click "Convert" and download your AMR file. No sign-up, no watermark.

Walk-through: Why Your AMR May Come Out Silent

AV1 is purely a video coding format from the Alliance for Open Media, whose bitstream specification was released in 2018. A file saved with a plain .av1 (or .obu, or .ivf) extension is a raw elementary stream — a sequence of Open Bitstream Units holding coded video frames and nothing else. The AV1 specification defines no audio at all. The sound you heard when you played an AV1 video lived in a container — a .webm, .mkv, or .mp4 — that wrapped the AV1 video next to a separate audio track (usually Opus, sometimes AAC). Demux down to a bare .av1 and that audio is left behind.

So the result depends entirely on what you uploaded:

• If you want speech in AMR but only have a raw .av1, there is no soundtrack inside it to convert. Upload the container instead with MP4 to AMR, WebM to AMR, or MKV to AMR.
• If a container got renamed .av1, the converter will decode whatever audio track it finds and write a valid AMR — but that is the exception, not the rule.
• If the audio is not speech, AMR is the wrong target regardless of source. It throws away everything above ~3.4 kHz, so music turns to mush. Use AV1 to MP3 for general audio.

AV1 (source) vs AMR (output here) at a Glance

Common Errors and How to Fix Them

• "My AMR is silent or empty" — Expected for a true raw .av1 bitstream: it contains no audio to extract. Convert the container that holds your AV1 video instead — MP4 to AMR, WebM to AMR, or MKV to AMR.
• "My music sounds terrible in AMR" — AMR-NB is a narrowband speech codec; it discards audio above ~3.4 kHz on purpose. For music, pick a full-range target like AV1 to MP3 or AV1 to WAV.
• "I wanted to keep the video" — AMR is an audio target. To keep the picture, convert AV1 to a video format such as AV1 to MP4.
• "The AMR won't open on my computer" — AMR plays natively on Android and many phones; on desktop, VLC and QuickTime open it. For a more universally accepted file, AV1 to MP3 is the safer choice.
• "The file won't upload or convert" — A raw .av1 stream that is truncated or non-conformant may fail to decode. Confirm the file plays in a current build of VLC first.

When This Doesn't Work

This tool can only write audio that actually exists in the source, and a genuine raw .av1 bitstream is video-only — so there is no soundtrack for it to produce. The realistic path to an AMR voice file is to start from the container that carries both the AV1 video and its audio and use MP4 to AMR or WebM to AMR. And remember that AMR is purpose-built for speech: if your audio is music or you simply want a small, broadly playable file, AV1 to MP3 is the better target. If you only want to keep the picture, reach for AV1 to MP4 instead.

Which File Do You Actually Have?

AMR is a speech codec, so the goal is a voice track — and where that voice lives decides the tool. Match your file to the correct row:

Frequently Asked Questions

Why is my AV1-to-AMR output silent or empty?

Because a raw .av1 file is a video-only bitstream. AV1 is a video codec, and its raw Open Bitstream Unit stream carries no audio track at all — sound always rides in a container (MP4, WebM, MKV) alongside the AV1 video. With nothing to extract, the AMR comes out empty or silent. To get the voice track, convert the container file with MP4 to AMR or WebM to AMR.

My video uses AV1 but it's an MP4 — which tool do I use?

Use the tool that matches the file's actual extension. If the file on disk ends in .mp4, the audio is inside that MP4 container even though the video codec is AV1, so MP4 to AMR is the right choice. Use this AV1-to-AMR page only for true raw .av1 (or .obu) bitstreams — and those have no audio to extract.

Is AMR good for music or only speech?

Only speech. AMR-NB samples at 8 kHz with a bandwidth of roughly 200–3400 Hz and uses ACELP compression tuned for the human voice — it was adopted as a 3GPP speech standard in the late 1990s for mobile calls. Anything outside the voice range, including music, is discarded, so it sounds muffled. For general audio, convert to AV1 to MP3 or the lossless AV1 to WAV instead.

Why is AMR so small, and what bitrate should I pick?

AMR-NB is one of the most compact audio formats because it encodes only the voice band at 4.75–12.2 kbps across eight modes. A minute of narrowband speech lands in the tens of kilobytes. In our testing, a one-minute spoken-word clip encoded to AMR-NB at the 12.2 kbps mode produced a file under 100 KB — clear for voice, useless for music. Pick the highest mode (12.2 kbps) for the best speech clarity, or a lower one only when you must shrink the file further.

Does converting AV1 to AMR keep the video?

No. AMR is an audio-only format, so this is an audio-extraction tool with no picture in the output. Because a raw .av1 stream is video-only to begin with, you would also be extracting from a file that has no sound. If you want to keep the video, convert to a video format such as AV1 to MP4.

What's the difference between AMR-NB and AMR-WB?

AMR-NB (narrowband) samples at 8 kHz and keeps roughly the 200–3400 Hz telephone voice band at 4.75–12.2 kbps — it is the variant nearly every phone voice recorder used, and the default here. AMR-WB (wideband) samples at 16 kHz and captures a wider ~50–7000 Hz band, so speech sounds fuller. Either way AMR is built for the human voice: both discard the high frequencies that music needs, so for anything but talking a full-range target like AV1 to MP3 is the better choice.

Can I convert several AV1 files to AMR in one batch?

Yes — drop multiple files or use "+ Add Files" and they convert together with the same band, bitrate, and channel settings. Keep in mind the honest limits still apply to every file in the queue: a true raw .av1 bitstream has no audio to extract, so the batch only yields speech if each source is actually a container that carries an audio track. For those, upload the .mp4, .webm, or .mkv instead of a demuxed .av1.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.