Supported formats
Images
WebP recommended
JPEG and PNG supported
SVG for icons and logos if your experience supports it
Video
MP4 (H.264) recommended for widest Android 8 compatibility
WebM optional if your experience supports it
Audio tracks in AAC are supported inside MP4
Tip: Prefer WebP for photos and lightweight PNG or SVG for flat graphics.
Size and performance guidance
Keep images under 500 KB each where possible
Keep the total campaign size under 20 MB unless you include video
Large files slow device updates and can fail on poor networks
The CMS blocks files that exceed internal limits and warns if the campaign is too large
Video recommendations
Use these as practical defaults. Adjust if your design needs higher quality.
1080p 30 fps: target 4 to 8 Mbps H.264
720p 30 fps: target 2.5 to 5 Mbps H.264
Portrait kiosks: export in native orientation to avoid rotation at runtime
Keep loops short for smoother playback and quicker downloads
Avoid alpha channels in video unless strictly required
Thumbnails and previews
The CMS generates thumbnails and placeholder previews automatically
Use previews to confirm sharpness, crop, and orientation before publish
CDN and origin
Assets are stored on S3 and served through CloudFront
Caching follows the default S3 cache period
Replace assets with optimised versions rather than upscaling in the browser
How assets update on kiosks
Local images are cached by the service worker and update when the app updates
Cache invalidation runs when the device is online at any of these moments:
Session refresh every 10 to 15 minutes
Idle for 60 seconds
Service worker update when a new build is deployed
Devices will continue to show the last cached assets while offline.
Enterprise media processing
Optional server side image resizing and video transcoding can be enabled for enterprise
Talk to us if you need automatic renditions or stricter cache rules
Troubleshooting assets
Image looks blurry
Re-export at the kiosk’s display resolution. Prefer WebP. Keep under 500 KB.Video stutters
Reduce bitrate or resolution. Aim for the ranges above. Confirm the site meets network guidance.New asset not appearing
Ensure the device is online and allow a session refresh. If a build deployed, wait for the service worker update.Campaign slow to deploy
Check total size under 20 MB. Recompress large images. Trim video duration or bitrate.Upload blocked
The file exceeded limits. Compress and retry. The CMS shows the blocking reason during upload.