A little preparation.
A choice that stays in place.
Prepare your footage on this PC, then rehearse the reveal on your phone.
On the PC, double-click Open-MentalProjector.bat. On your phone, open the private upload-studio link printed by Start-PhoneTest.ps1.
Your rehearsal
Synthetic exampleThe choice goes here.
Load the example or prepare your own footage to begin.Tracking is prepared on your PC. The answer is rendered on this device.
Download final video
Your final MP4 includes the cleanup, revealed answer and original audio. In a rehearsal, send your answer and choose Lock reveal. In a live performance, the spectator player freezes the first ready picture. Then prepare the download here.
Open a rehearsal and lock the answer to enable downloading.
Download final video (.mp4)Tracking map
Green: tracked · Pale: missing · Outline: answer window. Tracking availability does not guarantee correct alignment.
Set manual reveal timing without retracking
This creates a manual timing override. Pause or scrub the video above, then mark your start and end. Save to preview the new timing in a separate rehearsal.
Saved videos
Stored on your PC and ready to reuse. Each video keeps its saved preparation versions together.
Trash hides videos from your library. Restore them here at any time. Files remain on your PC and existing rehearsal links keep working; moving to Trash does not free disk space.
Original footage preview. The saved points, cleanup and timing load when you choose a version below. Open a rehearsal to see its overlay.
Organize saved footage
Prepare your surface
Choose a clear artwork-side frame, then define tracking, artwork and cleanup. Automatic timing finds the turn; browsing keeps your selected points.
1. Watch and choose frames
Loading video…
Automatic is the default for new videos. Choose a clear artwork-side reference, then review the turn after preparation. Select Manual to set your own start and end.
Choose a clear frame with the surface visible. Using a new reference clears your tracking points, artwork corners and cleanup shapes; browsing or changing reveal timing keeps them.
2. Define the surface
First select 4–32 tracking landmarks, then four artwork corners, then a cleanup area if needed. All three follow the same flat surface, but have independent boundaries.
Place small shapes over the marks you want removed. Keep the surrounding paper untouched.
Tap each tracking mark. Zoom and scroll for precision.
Add a shape, then drag it over a mark. Drag its square handle to resize, or use the size fields below. Keep shapes small; they can overlap. Scroll image mode lets you pan without moving shapes.
This comparison used a large cleanup area. Replace it with small shapes. Preparing saves a new comparison and keeps the old one.
Add a circle or rectangle above the image.
Select a point on the image or in this list to correct it.
In Move mode, drag a point or select it and tap its new location. With the image focused, use arrow keys to nudge 1 pixel, or Shift + arrows for 10. Switch to Add / scroll to pan a zoomed image.
New points use this size. Select an existing mark above to change only its circle.
3. Preview and prepare
Preview cleanup on the reference frame before preparing the full video. Cleanup follows reliable tracking, including before the answer appears.
Large cleanup areas can blur texture or affect hands. Keep the area within plain paper and inspect the result. Untracked frames keep their original marks. Opening and ending footage play normally outside the reveal.
Tracking method and overlay appearance
Optical flow follows selected points. ORB needs distinct surface texture. A solid patch replaces the whole overlay area with a flat color. Cleanup is intended for small marks on plain paper; hands covering marks, bending paper and complex textures can leave artifacts.
Saves a new comparison. Your source video and existing rehearsals stay available.