ScreenPrep

Let's get these files ready for the screen.

Pick the folder someone gave you, or just one file. Photos and video are both resized for you — you don't have to do anything to them first.

A whole folder, or just one file — either is fine.
Your originals are never changed.

Here's how they'll look

Everything below is ready to go. If one looks wrong, click it and nudge it.

Getting your files ready…

This usually takes less than a minute.

All done.

This is exactly what will show on the screen.

loading…
Drag it to move it

Setup

Set this up once. The people using this on a Sunday never need to open it.

The screen

Size×
Presets

Default framing

Individual adjustments

None
A file you adjusted keeps its own settings and ignores the ones above. Releasing puts it back under these master settings.

Start clean

Reset every setting
Open in a browser
The same running app, viewable in Chrome or Safari at that address. Useful for screen sharing or getting a second pair of eyes on it.
Puts the screen back to 1792 x 768, the crop origin back to 0,0, alignment back to center, and releases every individual adjustment.

Photo align

Align
Center
Where the image sits on the screen. On a photo that overhangs, this picks which edge is kept.

Empty space

Softness
Darkness

Video signal

Wrap inside a video raster
Leave on for a DeckLink or any SDI feed. Off if the display takes the screen size natively.
Raster
Pin to
Center
Set your processor to

Files it writes

Photos
Quality
Video
Quality

Video

Checking…

How to use this

The whole thing in four steps

If someone already set this up, this is all you need.

  1. Choose a Folder. Or Choose Media if it is only one or two files.
  2. Look at them. Each file appears the way it will appear on the screen. The white outline is the screen itself.
  3. Fix any that look wrong. Click one, nudge it, click Looks Good. Most days you will not need to.
  4. Get Them Ready. Finished files land in a _wall folder beside the originals.
Your originals are never touched

Nothing is edited, moved or renamed. Every finished file is a new copy, so if something comes out wrong you just change it and run it again.

What the picture is telling you

Each tile shows the whole video signal your processor receives. The white outline inside it is the part that actually reaches the wall.

what the wall shows everything the processor is sent the black margin is thrown away

A file can look like it has black bars here and still fill the wall — the bars are outside the outline.

Setting it up once

The gear at the top left. Someone does this when the wall is installed; whoever runs it on a Sunday never has to open it.

The screen

The real pixel size of your wall — not the video format. If the wall is 1792 × 768, put that in, even though you are feeding it 1080p.

Default framing
SettingWhat it does
Full heightTop and bottom touch the screen. Wide photos lose their sides. The usual choice.
Full widthLeft and right touch. Tall photos lose top and bottom.
All of itThe whole photo always fits, so there is empty space around it.
Fill & cropPhoto covers the screen completely; the overhang is cropped.
Empty space

What sits behind a file that does not fill the screen.

  • Blurred — a soft enlarged copy of the photo. Fills the gap without anyone noticing there was one.
  • Black — plain black, which disappears on an LED wall in a dark room.
  • Clear — genuinely transparent, for layering over something else in ProPresenter.
Clear changes the file type

JPEG cannot store transparency, so a photo set to Clear is written as a PNG. Video set to Clear becomes a .mov — ProRes 4444, which is the format that carries an alpha channel. Only the files you set to Clear change; the rest stay JPEG and MP4. Expect the ProRes files to be large.

Photo align

Where the image sits on the screen. It matters when the image is bigger than the screen and something must be cropped — align decides which part survives. A wide group shot with the worship leader on the left: set align to Left and the right side is cropped instead of both edges.

Video signal

Leave Wrap inside a video raster on if you feed the wall through a DeckLink or any SDI chain. Turn it off only if the display takes your wall's exact pixel size natively. The Pin to grid decides where the screen sits inside that signal.

The one number that must match

The readout says something like 1792 × 768 @ 64, 152, and it is in the title bar at all times. Your processor must be set to crop exactly that, with no scaling. If those two disagree everything lands wrong on the wall, and it will look like this app is broken when it is not.

Fixing one file

Click any file. Everything in there affects that one only: drag to move it, Smaller/Bigger to zoom, and its own framing, background and align. Click Looks Good to keep it — the tile gets an Adjusted badge so you can see which ones you touched.

An adjusted file stops listening to Setup

That is the point of adjusting it. To put it back under the master settings, open it and click Start This One Over, or use Release all in Setup to free every adjusted file at once.

When something looks wrong

Everything lands off-center on the actual wall

Compare the crop number in the title bar with what the processor is set to. They must be identical. This is by far the most common cause and nothing in the app can detect it.

Something is cropped in the wrong place

Change Photo align, either in Setup for everything or on that one file.

A video is flagged and skipped

The browser version does photos only — use the Mac app for anything with motion. In the Mac app, if the badge reads Photos only, open Setup › Video and choose Search this Mac; a copy of the video tool usually already exists inside OBS, VLC or Resolve.

The settings look scrambled

Setup › Factory reset returns everything to defaults and releases all adjustments. Nothing you have already exported is affected.