Convert MPEG Video (.mpeg) to Adaptive Multi-Rate Audio (.amr) online for free. Fast, secure video conversion with no watermarks or registration.
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MPEG video files contain audio tracks that far exceed what low-bandwidth voice applications require. AMR (Adaptive Multi-Rate), standardized by 3GPP in 1999, is a speech-optimized codec that operates at bitrates from 4.75 to 12.2 kbps using eight narrowband modes. Converting MPEG to AMR extracts just the voice content in the smallest possible audio format.
AMR was designed specifically for GSM cellular voice transmission and remains the codec of choice for MMS audio messages, voice memos on older phones, and voice-over-IP applications in bandwidth-constrained environments. When you need to extract speech from MPEG recordings — such as news broadcasts, interview footage, or recorded phone calls — AMR delivers intelligible voice at file sizes 10-20x smaller than MP3.
Telecom and voicemail systems often require AMR input. If you are building an IVR system, archiving call recordings, or distributing voice content to regions with limited connectivity, converting MPEG audio to AMR ensures compatibility with the widest range of voice-centric devices and platforms.
FFmpeg decodes the MPEG audio track and re-encodes it using libopencore_amrnb at a fixed narrowband rate (8000 Hz, mono). The typical command is `-vn -acodec libopencore_amrnb -ar 8000 -ac 1 -b:a 12.2k`. AMR-NB supports eight bitrate modes; 12.2 kbps provides the best quality, while 4.75 kbps is the most compact. The codec automatically adapts frame-by-frame in real-time voice applications, but for file encoding, a fixed rate is used.
AMR-NB is a narrowband codec limited to 300-3400 Hz, the range of human speech fundamentals. Music, ambient noise, and high-frequency detail are almost entirely lost. Speech intelligibility is good at 12.2 kbps but degrades noticeably below 7.4 kbps. This conversion is appropriate only for voice content.
| Device | MPEG | AMR |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
MPEG to AMR is a purpose-built conversion for voice extraction, producing the smallest possible audio files while maintaining speech clarity for telephony and mobile messaging applications.
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Alle nettlesere, alle enheter
| Egenskap | MPEG | AMR |
|---|---|---|
| Fullt navn | Moving Picture Experts Group | Adaptive Multi-Rate Audio |
| Filendelse | .mpeg | .amr |
| Best egnet for | Universal support | Speech optimized |