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Supports: MPG, MPEG
This tool extracts the soundtrack from an MPG (MPEG-1 or MPEG-2) video and re-encodes it as AMR — it discards the video entirely and keeps only the audio. AMR (Adaptive Multi-Rate) is the narrowband speech codec built into mobile networks, so this conversion makes sense for one thing: turning spoken-word audio from a video into a tiny voice file for older phones, MMS, or telephony. One caveat up front — AMR is a speech codec, not a music format. If your MPG holds music or general audio, send it to MPG to MP3 instead; reserve AMR for voice.
| Property | MPG (source) | AMR (output) |
|---|---|---|
| Type | MPEG-1/MPEG-2 video container | Audio-only, speech codec |
| Audio track | Typically MP2, lossy stereo | Mono speech |
| Sample rate | 44.1 kHz or 48 kHz | 8 kHz (NB) or 16 kHz (WB) only |
| Frequency range | Full audible spectrum | ~300 Hz–3.4 kHz (NB), ~50 Hz–7 kHz (WB) |
| Audio bitrate | ~128–384 kbps (MP2) | 4.75–12.2 kbps (NB), 6.60–23.85 kbps (WB) |
| 1-minute audio size | ~1–3 MB | ~35–90 KB (NB), ~50–180 KB (WB) |
| Best for | Video playback, music, general audio | Voice ringtones, MMS, voicemail, IVR |
Only the audio. AMR is an audio-only speech format, so this conversion pulls the soundtrack out of the MPG and discards the video stream entirely. That is most of the file — an MPG is overwhelmingly video data, so the AMR output is a tiny fraction of the original size. If the MPG has no audio track at all, the output will be empty.
Because AMR is a speech codec, not a music format. AMR Narrow Band filters everything outside roughly 300–3400 Hz and encodes at 8 kHz mono — it models the human vocal tract and throws away the high frequencies, bass, and stereo image that music needs. That is by design: it was built to carry a voice over a phone network in as few bits as possible. For music or general audio, convert the MPG to MP3 or WAV instead.
Pick AMR Narrow Band (8 kHz) when the target is an older phone, MMS gateway, GSM voicemail, or any system that assumes narrowband — it is the most universally supported variant. Pick AMR Wide Band (16 kHz, the G.722.2 / HD Voice codec) when the playback device supports it and you want clearer, more natural speech. Both are mono speech codecs, so neither is suitable for music.
Small. Two reductions stack: you drop the entire video track, then re-encode the remaining audio from a ~128–384 kbps MP2 stream down to a 4.75–23.85 kbps speech stream. In our testing, a 40 MB one-minute MPG clip produced an AMR-NB file of about 90 KB at the top 12.2 kbps mode — lower modes down to 4.75 kbps are smaller still.
Not always out of the box. AMR is universal on older handsets and telephony systems but is no longer recognized natively by recent iOS and Android default players, and many desktop players need an extra codec. It still works in VLC and Audacity, and it remains valid for MMS, ringtone slots, and backend systems (Asterisk, FreeSWITCH, IVR) that expect AMR. If you just need audio that plays everywhere, use MPG to MP3 or convert the result with AMR to MP3.