Convert AVI to AMR — Free Online Converter
Convert Audio Video Interleave (.avi) to Adaptive Multi-Rate Audio (.amr) online for free. Fast, secure video conversion with no watermarks or registr...
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How to Convert
Upload your .avi file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .amr file when it's ready.
About AVI to AMR Conversion
AVI is Microsoft's general-purpose video container capable of holding video and audio in a wide variety of codecs. AMR (Adaptive Multi-Rate) is a specialized narrowband speech codec standardized by ETSI/3GPP, operating at bitrates between 4.75 and 12.2 kbps. AMR was designed for GSM cellular voice transmission and is optimized exclusively for human speech — it performs remarkably well on voice content but produces poor results with music or complex audio. Converting AVI to AMR extracts the audio track and encodes it for mobile voice applications.
Why Convert AVI to AMR?
AMR is the standard audio format for voice memos on many Nokia, Samsung, and legacy Android phones. If you have AVI recordings of meetings, interviews, or lectures and need to create the smallest possible voice files for MMS, voice memo apps, or VoIP systems, AMR is the format that achieves the most extreme compression while keeping speech intelligible. At 12.2 kbps, a one-hour recording takes under 6 MB.
Common Use Cases
- Creating ultra-compact voice recordings from AVI interview footage for mobile distribution
- Extracting speech audio from AVI conference recordings for MMS sharing
- Generating lightweight voice previews of AVI content for feature phone playback
- Converting AVI training videos to AMR for voice-only playback on basic mobile handsets
- Preparing audio from AVI recordings for integration into VoIP or IVR telephony systems
How It Works
FFmpeg decodes the AVI audio stream to raw PCM, resamples it to 8 kHz mono (the AMR-NB requirement), and encodes using the libopencore_amrnb encoder at the selected bitrate (4.75–12.2 kbps). AMR-NB operates on 20ms frames with algebraic CELP coding, analyzing speech patterns to achieve extreme compression. The codec applies voice activity detection (VAD) and comfort noise generation (CNG) to further reduce bandwidth during silence periods.
Quality & Performance
AMR-NB at 12.2 kbps delivers clear, intelligible speech comparable to a standard phone call. Lower bitrates (4.75–7.4 kbps) produce noticeably degraded but still understandable speech. Music, sound effects, and non-speech audio will sound heavily distorted regardless of bitrate — AMR is designed exclusively for voice.
Device Compatibility
| Device | AVI | AMR |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Always use the highest AMR bitrate (12.2 kbps) unless you have a specific requirement for lower rates — the quality improvement is substantial.
- 2Pre-filter the audio to remove background noise before conversion, as AMR's speech model amplifies noise artifacts at low bitrates.
- 3If your AVI contains both speech and music, split the audio and convert only the speech portions to AMR, keeping music in AAC or MP3.
- 4Test AMR playback on the target device before batch converting — AMR compatibility varies between phone models and operating systems.
Related Conversions
AVI to AMR conversion is a specialized operation for voice-only use cases. When you need the absolute smallest audio files with intelligible speech, AMR delivers unmatched compression efficiency.