Content Management Guide For LED Screens

Overview

This guide is intended for customers using NowSignage as their CMS on deployments that include LED screens, whether that's a single LED panel, a large-format LED wall, or a bespoke multi-cabinet installation.

LED screens behave differently to standard commercial displays, and this has a direct impact on how you should create and manage your content. Understanding these differences upfront will save time, avoid visual quality issues, and ensure your content looks exactly as intended.

 

Section 1: Why LED Is Different

Standard commercial displays (TVs, monitors, and most commercial signage screens) have a fixed, well-known resolution — typically 1920 × 1080 (Full HD) or 3840 × 2160 (4K). The media player connects directly to the screen, and the display handles the rest.

LED walls work differently. The signal chain typically looks like this:

NowSignage CMS → Media Player → LED Controller/Processor → LED Screen

Each stage in that chain can influence what the viewer ultimately sees:

• The media player outputs a signal at a specific resolution (e.g., 1080p or 4K). Not all players support custom or non-standard resolutions.
• The LED controller or processor receives that signal and maps it across the physical LED canvas. This is where scaling, stretching, or pixel mapping is applied.
• The LED screen itself is built from individual cabinets or panels. Its total pixel count — and therefore its true canvas resolution — is determined by the physical configuration, not a fixed standard.

This means the final visual result is shaped by the full chain, not just the CMS. NowSignage controls what is sent from the player outward; what happens downstream is determined by the hardware.

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Section 2: Understanding Aspect Ratio and Resolution for LED

Aspect Ratio

Aspect ratio is the proportional relationship between a screen's width and height, expressed as two numbers – for example, 16:9. Standard widescreen content is 16:9. Vertical portrait screens are typically 9:16.

LED walls frequently use non-standard aspect ratios. A wide fascia LED above a reception desk might be 4:1 or 6:1. A strip LED running the length of a ceiling could be even more extreme. If your content is created for 16:9 but played on a 4:1 LED canvas, it will either be cropped, letterboxed, or stretched.

Resolution

Resolution is the total number of pixels on a screen, expressed as width × height. Common standard resolutions are:

• 1920 × 1080 – Full HD (16:9)
• 3840 × 2160 – 4K UHD (16:9)
• 1280 × 720 – HD Ready (16:9)

LED canvases regularly fall outside these standard sizes. A 3m × 0.6m LED fascia might have an effective canvas of 1920 × 384 pixels, or 2560 × 512, depending on the pitch and cabinet count. These resolutions do not map neatly to any standard format.

The critical principle: content should be authored at the same pixel dimensions as the LED canvas. This is the single most important step you can take to ensure a clean, distortion-free result.

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Section 3: How NowSignage Handles LED Canvases

Default Behaviour

By default, NowSignage outputs content to match the resolution of the connected media player. For most deployments, the player outputs at a standard resolution (1080p or 4K), and the LED controller downstream handles the mapping to the physical screen.

This approach works well when the LED controller is correctly configured to accept that standard signal and scale or map it appropriately.

Custom Resolution Output

In some deployments, it may be desirable to force a specific output resolution from the CMS to match the LED canvas exactly — for example, outputting at 1920 × 520 rather than 1920 × 1080. This can be configured within NowSignage where the media player supports it.

Whether this works in practice depends on:

• Whether the media player's operating system and GPU support the custom resolution
• Whether the LED controller expects and can accept a non-standard input signal
• How the broader signal chain is configured

Content Scaling Behaviour

When content dimensions do not match the output canvas, scaling will occur. How this manifests depends on the content type:

• Images will typically be stretched to fill the canvas area. This avoids black bars but may cause distortion if the aspect ratio does not match.
• Video may letterbox (black bars top and bottom) or pillarbox (black bars left and right), or it may be stretched depending on screen settings. Stretching video can be enabled in your screen settings within NowSignage, but this may distort the image if the source resolution differs significantly from the canvas.

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Section 4: Content Creation Best Practices for LED

Rule 1: Author at the Canvas Resolution

Before creating any content, establish the actual pixel dimensions of your LED canvas. This should be provided by your installation team. Once confirmed, create all images and videos at exactly those dimensions before uploading into NowSignage.

For example:

• Standard widescreen LED wall at Full HD: 1920 × 1080
• Wide fascia LED (e.g. reception or retail strip): e.g. 1920 × 384 or 2560 × 512 — confirm with your installer
• Portrait LED panel: e.g. 1080 × 1920

Rule 2: Match the Aspect Ratio Exactly

If your LED canvas has a non-standard aspect ratio, your content must reflect this. A standard 16:9 video played on a 6:1 LED fascia will look severely distorted or heavily cropped. Your design tool or video editing software should be set to the exact pixel dimensions from the outset.

Rule 3: Avoid Oversized Files

Uploading files that are significantly larger than the canvas resolution puts unnecessary strain on the media player. The hardware must scale down the file on every render cycle, which can cause performance issues, device instability, or screen disconnection.

Rule 4: Avoid Undersized Files

Content that is smaller than the canvas resolution will be upscaled, which can result in a blurry or pixelated output — particularly noticeable on high-resolution LED walls.

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Section 5: Questions to Confirm with Your Installation Team

Before finalising your content workflow, make sure you have the following information from your LED hardware installer:

• What is the total pixel resolution (width × height) of the LED canvas?
• Is the installation one large LED or multiple cabinets? If multiple, are they treated as one canvas or separate zones?
• What is the LED controller model, and what resolution does it output to the media player?
• Is the controller capable of 4K input/output?
• What media player is being used, and what resolution is it configured to output?
• Is a 1:1 pixel map in use, or is scaling applied by the controller?
• Are there any known restrictions on the input signal (e.g. max resolution, supported formats)?

Having clear answers to these questions allows content to be created correctly, avoiding rework.

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Section 6: Common Scenarios and Recommended Approaches

Scenario A: Standard LED Wall (16:9 canvas, 1080p or 4K)

Your content workflow is essentially the same as for a standard commercial screen. Author at 1920 × 1080 or 3840 × 2160, upload as normal, and the LED controller will handle the signal as expected.

Scenario B: Wide-Format LED Fascia (e.g. 1920 × 384)

Create all content at the exact canvas dimensions. Use landscape-orientated design tools. Avoid using standard 16:9 templates — they will be cropped or distorted. Confirm the exact pixel dimensions with your installer before starting content production.

Scenario C: Tall/Narrow LED (Portrait or Unusual Ratio)

The same logic applies. Author at the confirmed pixel dimensions. If the canvas is, say, 768 × 1920, your design canvas must match. Standard portrait content (1080 × 1920) will not fit correctly.

Scenario D: Multi-Panel LED (Several Cabinets as One Canvas)

Confirm with your installer whether the panels are configured as a single unified canvas or individual zones. If it is one unified canvas, author content at the total combined pixel resolution. If they are separate zones, treat each zone as its own screen with its own content dimensions.

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Section 7: NowSignage CMS Configuration Notes

• Screen settings in NowSignage allow you to control stretch behaviour for video content. If your content aspect ratio does not match the canvas, enabling stretch may fill the screen but can introduce distortion.
• Custom resolution output can be set in NowSignage where the media player supports it. Consult your installation team before enabling this, as it must align with what the LED controller expects to receive.

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Section 8: Implications of incorrectly sized content on the hardware

If content is too large (oversized resolution): The media player has to downscale on every single render cycle. This can be particularly punishing on the hardware – it can cause frame drops, sluggish playback, thermal throttling, and, in sustained cases, the player crashing or disconnecting from the NowSignage app entirely. Essentially, you're making the hardware work hard on a problem that should have been solved at the content creation stage.

If content is too small (undersized resolution), the player upscales on every render, which is less impactful but still wasteful on processing overhead. The visual result is also degraded — blurry or pixelated output, which on a high-pixel-pitch LED wall is very obvious to anyone standing near it.

Summary: Key Takeaways

Topic	Guidance
Content dimensions	Always match the pixel dimensions of your LED canvas
Aspect ratio	Author at the exact ratio of the physical screen — do not assume 16:9
File size	Keep files at or near native canvas resolution; max upload is 5GB
File names	Max 60 characters; keep names unique
Hardware questions	Refer to your LED installation team — they control the hardware layer
Scaling/stretch	Use as a fallback only; native-resolution content always looks best
Custom resolution output	Possible in NowSignage where the media player supports it; test first

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