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Signage content checker

Drop your videos and images to check resolution, frame rate, codec and size against the rules screens play by, and whether the videos of a playlist match. Nothing is uploaded.

See how it works · 5 steps

Drop your videos

Drop the clips you plan to play. They are read in the browser, never uploaded.

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Check against a screen of

Drop videos or images hereUp to 12 at a time. Files are read in your browser and never uploaded.

The playback rulesWhat every player needs

Videos in one playlist are best at one resolution, frame rate and codec. Mixed ones are stitched into one video for the screen; sent as separate files, they can flash black between clips.
H.264 in an MP4 plays on every player.
Walls play at a constant 30 fps; seamless loops at 30 or 60.
Uploads up to 5 GB a file.

Nothing checked yet

Drop a few clips you plan to play together: the checker also tells you whether they match.

Photo: cottonbro studio · Pexels License. The window shows the real castv.ai tool, running on sample settings.

Where the answers come from

The rules are castv.ai's own: every video in a playlist must share resolution, frame rate and codec (so single-decoder TVs don't flash black between clips), wall tiles are composed at a constant 30 fps and seamless loops at 30 or 60, and uploads are limited to 5 GB. Your browser reads the codec from the file's container and measures the frame rate by playing a second of it.