AVI to AMR Converter

Extract AVI Audio to AMR: What This Tutorial Covers

This tool throws away the video in your AVI and keeps only the soundtrack, re-encoding it as AMR — the narrowband speech codec phones and telephony systems use. Be clear-eyed before you start: going from a full-quality AVI soundtrack to AMR is one of the most drastic downgrades available, turning rich audio into 8 kHz telephone-quality mono. Speech survives it and shrinks dramatically; music does not. Only do this when something specifically needs a .amr file. If you just want the audio out of an AVI at normal quality, convert AVI to MP3 instead — that is the right choice for almost everyone.

How to Convert AVI to AMR

1. Upload Your AVI File: Drag and drop the file onto the page or click "+ Add Files" to select it from your computer. You can queue several AVIs and convert them with the same settings.
2. Choose a Constant Bitrate Preset: Under Advanced Options, open Constant Bitrate and pick a Preset — the AMR-NB modes run from 4.75 KBPS (smallest, roughest) up to 12.2 KBPS (the AMR-NB maximum, best for speech). Use 12.2 KBPS unless a target system asks for a specific mode.
3. Confirm Channel and Sample Rate (Optional): AMR-NB requires mono 8 kHz, so Audio Channel defaults to MONO and Audio Sample Rate to 8000 Hz — leave these. You can also set Trim to keep only the part of the soundtrack you need.
4. Convert and Download: Click "Convert" and download your .amr file. No sign-up, no watermark.

Walk-through: Picking the Right AMR Bitrate

AMR-NB has no stereo and no high-sample-rate mode — every output is 8 kHz mono, filtered to the 200–3,400 Hz telephone band. Your only real quality lever is the bitrate mode, and the difference between the lowest and highest mode is small because all of them throw away the same frequencies. Match the mode to where the file is going:

• You want maximum intelligibility for speech — pick 12.2 KBPS, the AMR-NB top mode. This is the sensible default for extracting dialogue.
• A telephony system, IVR prompt, or device documents a specific mode — pick exactly that one (for example 7.40 KBPS, the "toll-quality" mode many phone systems expect).
• You need the absolute smallest file and the content is short voice — drop to 4.75 KBPS; expect a rougher, more "compressed phone call" sound.
• The source is music or has important high frequencies — no bitrate mode will save it. Stop here and use AVI to WAV for editing or AVI to MP3 for listening.

Common Errors and How to Fix Them

• "The output sounds thin, warbly, or muffled" — That is AMR-NB working as designed. It keeps only the 200–3,400 Hz speech band, so music and bright audio lose most of their range. For anything but plain speech, convert to MP3 or WAV instead.
• "My AMR is mono but the AVI had stereo" — AMR-NB is a single-channel codec; there is no stereo .amr. The two channels are downmixed to one. To keep stereo, AMR is the wrong target.
• "My phone or player won't open the .amr file" — Some media players don't bundle an AMR decoder. AMR is best supported on Android, in mobile messaging apps, and in telephony software; on a desktop, VLC opens .amr, or convert to MP3 for universal playback.
• "The converted file is silent" — The AVI's audio track may use a codec the source didn't decode, or the clip's audio is genuinely empty. Confirm the AVI plays with sound first, then re-convert.
• "I trimmed but got the whole clip" — Make sure you set both the start and the duration under Trim before converting; leaving Trim "Unchanged" exports the full soundtrack.

When This Doesn't Work

AMR is the wrong tool whenever fidelity matters. If you are extracting a song, a soundtrack, a podcast, or anything you intend to actually listen to, do not convert to AMR — the result will be telephone-grade no matter what you set. DRM-protected or corrupted AVIs may also fail to decode at all. The honest path for most people is to extract at full quality with AVI to MP3 (small, great for listening) or AVI to WAV (uncompressed, best for editing), and reach for AMR only when a feature phone, voicemail box, IVR menu, or MMS-era workflow specifically demands a .amr file.

Frequently Asked Questions

Why would I convert AVI audio to a low-quality format like AMR?

Almost always for compatibility, not quality. AMR is a speech codec, so it is the wrong choice if you care how the audio sounds — but some systems only accept .amr: older feature phones, voicemail and IVR (phone-menu) platforms, MMS attachments, and small embedded or telephony devices. In those cases the tiny file is also a benefit. If you simply want the AVI's audio at good quality, use AVI to MP3 instead.

Does this keep any of the AVI's video?

No. This extracts the audio track only and discards the picture entirely — the result is a .amr audio file with no video. AVI is a Microsoft container (introduced November 1992, built on the RIFF format) that interleaves audio and video; this conversion pulls out just the sound and re-encodes it as speech-grade AMR.

Will music or a soundtrack survive the conversion to AMR?

No. AMR-NB samples at 8 kHz and keeps only the 200–3,400 Hz telephone band, so instruments, bass, and high frequencies are largely discarded — expect thin, warbly output. It is built for voice, not music. For spoken-word audio (interviews, narration, dialogue) the result stays perfectly intelligible, which is exactly what AMR is for.

How much smaller is the AMR file, and what do the bitrate modes change?

Dramatically smaller, because you drop the entire video and re-encode the audio at one of AMR-NB's eight modes (4.75 to 12.2 kbit/s, standardized by 3GPP in October 1999). Higher modes give cleaner speech; lower modes give smaller files with a rougher sound — but all share the same 8 kHz mono, 200–3,400 Hz limits, so the quality range between them is narrow. The format adds almost no overhead beyond the voice payload, so a voice recording typically shrinks by well over 95% versus a full-quality soundtrack. Pick 12.2 KBPS for the best speech, or match a specific mode if a telephony system requires one.

In your testing, what does a real AVI-to-AMR result look like?

In our testing, a one-minute AVI clip of clear spoken dialogue, extracted at the 12.2 KBPS AMR-NB mode, produced a .amr file of roughly 90 KB with fully intelligible speech. The same pipeline run on a music clip produced a similarly tiny file, but the audio came out thin and hollow — a clear demonstration that AMR is for voice, not songs.

How do you handle my files, and how long are they kept?

Your file is uploaded over an encrypted connection, converted on our servers, and the upload and result are deleted automatically a few hours after conversion. There is no sign-up, no watermark, and files are never shared or made public.