MP4 to MIDI Converter Online
Turn MP4 performance, lesson, or rehearsal videos into editable MIDI notes. MelodyTrace normalizes the MP4 input, transcribes its audio, and gives you a piano-roll result to review.
- MP4
- Audio track extraction
- Editable MIDI
Click a note to hear it
How it works
Upload MP4
Choose MP4 performance, lesson, or rehearsal videos up to 50 MB and 10 minutes. The visual stream is ignored and the first audio track is extracted.
Review the transcription
Play the detected notes on the piano roll, compare them with the source, and adjust sensitivity, minimum note length, or pitch bends when needed.
Edit and download MIDI
Download the result immediately, or sign in to correct notes and export notation for the next step in your music workflow.
Formats & limits
- Input formats
- MP4
- Output
- MIDI (.mid)
- File limits
- 50 MB · 10 min
- Price
- Free · no sign-up
Preparing MP4 for a cleaner MIDI result
- Trim the video to the performance passage you need and favor clips where the target instrument is clearly audible.
- A clear single melody, vocal, or instrument line usually needs less cleanup than a dense finished mix.
- Trim long silence and unrelated sections before uploading so the transcription focuses on the passage you need.
- Speech, applause, and backing tracks are part of the extracted audio and can introduce unwanted notes.
Frequently asked questions
How do I convert MP4 to MIDI?
Upload the MP4 file, wait while its audio is normalized and transcribed, review the piano-roll result, and download the generated .mid file.
Does the MP4 video image affect the MIDI?
No. The video stream is discarded; only the first audio track is used for note transcription.
What MP4 files work best?
Trim the video to the performance passage you need and favor clips where the target instrument is clearly audible. Speech, applause, and backing tracks are part of the extracted audio and can introduce unwanted notes.
What are the upload limits?
Each file can be up to 50 MB and 10 minutes long. Short, focused passages also finish sooner and are easier to verify.