MIDI2MP4 Studio - Phase 10

Source

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

Project title Subtitle Composer Arranger Copyright Title layout

Canvas Preset

Preset FPS Width Height

Duration mode Export seconds Video quality

Background

Image spanning full canvas

Fit Overlay Vignette

03B

Visual Template

Template family Variation Note style Grid intensity Safe margin

Audio Layout

Channels Sample rate Instrument engine Normalize Room Stereo spread

Timeline + Arrangement

Trim start sec Trim end sec Lead-in sec Arrangement Tempo scale Transpose Fade in sec Fade out sec

Export Performance

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

QA + Failure Detectors

QA not run yet.

Arrangement Timeline

LOG

Export Console

MIDI2MP4 Studio Phase 10 initialized.

PLAN

Phase 10 Visual Master Contract

Exact duration: default exports lock to the full uploaded MIDI duration, not an arbitrary max cap.
Project save/load: export a reusable project JSON, or a simple stored ZIP bundle with the MIDI/background assets.
Timeline trim: arrangement mode can still trim/loop when exact-duration lock is turned off.
Playback transforms: tempo scaling, transpose, lead-in, and master fade in/out are applied to browser preview, WAV, and MP4 output.
Timeline strip: channel lanes show the arranged notes with horizontal overflow for longer sequences.
TimGM6mb sample kit: Browser playback, WAV export, and MP4 audio still 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: expanded template families now include piano, radial, spectrum, poster, constellation, wave tunnel, keyboard wall, and hybrid performance views.
Variations: each template family has ten visual takes, giving roughly eighty combinations before note-style changes.
Title-card metadata: project title, subtitle, composer, arranger, and copyright can be burned directly into the MP4 canvas.
Background images: PNG/JPEG uploads remain full-canvas cover/contain/stretch assets, with overlay and vignette controls for readable visualizer output.
Performance pass: JPEG frame pipeline, dynamic frame caps, export preflight estimates, batch yielding, and FFmpeg filesystem cleanup.
Failure detectors: host/CSP, FFmpeg asset shards, sample-kit assets, browser APIs, canvas encoding, and export-plan guardrails are checked in one pass.
Smoke test: a one-second internal MP4 encode can verify the FFmpeg worker without downloading a file.
QA report: diagnostics can be exported as JSON for hosting/browser troubleshooting.
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 10 keeps exact MIDI duration, TimGM6mb samples, QA diagnostics, and FFmpeg hosting checks, then adds title-card metadata, richer visualizer templates, expanded note styles, and background-image polish.

Run QA diagnostics to populate the Phase 10 browser/codec matrix.

No MIDI loaded yet.