# MP4 to MIDI

Choose an MP4 or another media file, let the browser decode its audio track, and transcribe the pitches it hears into a MIDI file you can download.

> Canonical: https://aimusicis.com/mp4-to-midi

## What MP4 to MIDI does with a video's audio track

Pick a video file and the page decodes the sound inside it, then transcribes the pitches it hears into a Standard MIDI File. The file is read and transcribed in the browser tab, so nothing is uploaded and nothing is billed.

### Reads the audio track of an MP4

MP4 and M4A containers carry sound, and the browser's own decoder reads that track directly, so no extraction step runs before transcription.

### Writes what it hears as MIDI notes

The basic-pitch model behind this page detects note onsets, pitches and durations, and writes each one into a downloadable MIDI file.

### Keeps the file on your device

Decoding and transcription both run in the tab, with the model fetched from this site, so the video never leaves your machine and no credits are drawn.

## Three moves from a video file to a MIDI file

### Choose a media file

Pick an MP4, another video format or an audio file. The size is checked before anything is read.

### Let the browser decode the sound

The audio track is decoded at 22,050 Hz and mixed down to a single channel for the transcription model.

### Download the MIDI

When transcription finishes, the page reports how many notes it found and offers the result as a .mid download.

## The limits behind a video-to-MIDI conversion

### 90 MB

The largest file the page reads. The size check runs before any audio is decoded.

### 15 minutes

The longest audio track this page transcribes. A longer track is rejected once its length is read from the decoded audio.

### 1 audio track

How many tracks are read per file: the first one the browser decodes from the container.

### 22,050 Hz

The sample rate the audio track is decoded at before it reaches the transcription model.

### .mid output

The result is a Standard MIDI File carrying each note's onset, pitch and duration.

### 0 credits

The transcription runs in the browser and submits no generation job.

## Who turns video audio into MIDI

### Songwriters lifting a melody from a clip

Capture a hummed idea from a phone video and open the notes in a DAW instead of replaying the clip by ear.

### Producers rebuilding a part they cannot notate

Turn a recorded instrument line into editable notes, then change the sound without re-recording the take.

### Teachers preparing a score from a recording

Transcribe a student's performance or a reference recording and bring the notes into notation software.

## Tools related to MP4 to MIDI

### [AI MIDI Generator](https://aimusicis.com/ai-midi-generator)

### [MIDI to MP3](https://aimusicis.com/midi-to-mp3)

### [MIDI Editor](https://aimusicis.com/midi-editor)

### [Free Chord Progression Generator](https://aimusicis.com/chord-progression-generator)

## MP4 to MIDI FAQ

### How do I turn an MP4 into a MIDI file?

Choose the MP4 with the button above, and MP4 to MIDI decodes its audio track in the browser, transcribes the pitches it hears, and offers the result as a .mid download.

### Does the video file leave my device?

The file stays in the browser tab. MP4 to MIDI decodes and transcribes on your device, so nothing is uploaded, no account is needed and no credits are drawn.

### Which file types can MP4 to MIDI read?

Any media file the browser can decode works: MP4 and M4A video, and audio formats such as WAV, MP3, OGG and FLAC. A file whose audio track the browser cannot read reports an error instead of producing notes.

### How long can the audio track be?

The audio track can run up to 15 minutes and the file can be up to 90 MB. MP4 to MIDI rejects a longer track or a larger file before decoding starts, rather than transcribing part of it.

### Does MP4 to MIDI transcribe every instrument in the mix?

MP4 to MIDI uses basic-pitch pitch detection, which is built around one note sounding at a time. A solo instrument or a single vocal line transcribes best; chords, dense mixes and percussion come out approximate.

### Why did my file produce so few notes?

MP4 to MIDI reports the notes the model actually detected. A quiet, noisy or percussion-heavy audio track yields fewer pitched notes than a clear melody does, so a clip with no sustained pitch can return an empty file.

### Can I edit the notes afterwards?

The download is a Standard MIDI File, so any DAW or notation editor can open it. You can move notes, quantize the timing or swap the instrument without touching the original video.

### Do I need an account or credits to use it?

MP4 to MIDI needs neither. There is no sign-in step and no generation job is submitted, because the transcription happens in the browser with the model already loaded from this page's own site.

### How many credits does MP4 to MIDI use?

MP4 to MIDI runs in the browser and draws zero credits.

## Take the transcription further

Download the .mid file, or open the audio to MIDI workbench when you want to adjust the detection thresholds before exporting.

_Last updated August 28, 2026_