MIDI2MP4 Studio

Source

Upload MIDI Format 0/1 SMF files. Tempo maps, note events, channel data, and time signatures are parsed locally.

Project title Subtitle

Canvas Preset

Preset FPS Width Height

Max export seconds Video quality

Background

Image spanning full canvas

Fit Overlay

03B

Visual Template

Template Note style Grid intensity Safe margin

Audio Layout

Channels Sample rate Instrument engine Normalize Room Stereo spread

Export Performance

Export mode Frame format Frame quality Memory guard Frame batch Auto cleanup

LOG

Export Console

MIDI2MP4 Studio Phase 6 initialized.

PLAN

Phase 6 Build Contract

TimGM6mb sample kit: Browser playback, WAV export, and MP4 audio now use the same imported sample-backed path by default.
Lazy sample loading: The app fetches only the piano/drum reference samples required by the loaded MIDI instead of preloading the whole kit.
Channel controls: MIDI pan, volume, expression, and reverb controller data are preserved where present.
Spatial audio: stereo spread, room reflections, and 5.1 distribution are applied before export.
MP4 encoder: bundled FFmpeg WASM, H.264 attempt with MPEG-4 fallback.
UI shell: export menu, bottom-right toast notifications, cloud-hostable static files.
CSP fix: Cloudflare/Netlify-style headers and meta policy now allow WASM compilation for FFmpeg.
Visual templates: piano roll, radial scope, spectrum bars, and minimal poster render modes.
Performance pass: JPEG frame pipeline, dynamic frame caps, export preflight estimates, batch yielding, and FFmpeg filesystem cleanup.
Fallback safety: Missing sample notes fall back to the Phase 3/5 GM-lite synth instead of killing an export.

Cloud/static deploy ready

Upload index.html, styles.css, app.js, _headers, the complete ffmpeg/ folder, and the complete assets/reference-kit/ folder to the same cloud/static hosting directory. Phase 6 uses TimGM6mb reference samples for browser playback and final export audio.

No MIDI loaded yet.