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Guide · Google Cast

Send your LumaDeck visuals to a TV with Google Cast

27 September 2026 · 5 min read

You can control a show in LumaDeck Web and send the composition to a compatible Google Cast display. The TV receives scenes, videos, layers, FX and text from the same master you control in the browser. Free keeps the lumadeck.app watermark; Web Pro removes it while active.

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Prepare your equipment and network

You need a compatible browser and Google Cast display or receiver, with both devices on the same local network. Our physically tested combination is desktop Chrome on Linux with a Mi Box. This does not validate every TV, browser or mobile device.

Turn on the display and select the receiver's input if you use an external receiver. You do not need to install another LumaDeck app on the TV. This output also works without Output Bridge: that bridge belongs to the NDI route.

Connect from the Master

1. Open LumaDeck and prepare the scene or show you want to send.
2. Press Cast in the Master. If the button reads Send to [display], check the named destination before pressing it. Otherwise, press Connect Google Cast and choose your display in Google's selector.
3. Wait for the status to change to Sending, then check the picture on the TV; an established connection can still be waiting for video.
4. Continue controlling scenes, media, layers and FX in the browser. To finish, open the Cast controls and press Stop Cast.

Once sending is confirmed, the large browser preview hides and the Master mini-monitor remains available. Check the TV as well to see what reaches the audience.

Keep LumaDeck open and the sending computer awake throughout the show. The TV plays the video generated by that computer: closing the browser or putting it to sleep interrupts the picture's source.

Music keeps its existing output route

LumaDeck analyses audio to drive the visuals, but Cast carries only the picture. Select and check the audio input in LumaDeck; your speakers continue receiving music from your usual setup. The TV's volume does not adjust the sensitivity of the analysis.

What 1080p means here

The output uses H.264 video at 1920×1080, up to 30 fps. That describes the transport format. Sharpness also depends on the master resolution, original material and compression; enlarging a small source does not add detail. Frame rate can vary with the scene, video, computer, receiver and network.

The connection adds delay. We do not promise zero latency or exact visual alignment with every beat. Any estimate displayed by the app has the scope stated in its label and does not replace a physical measurement of the screen.

Test your show before using it with an audience

Try the content you plan to use: AUTO changes, your videos, logos, text and FX. Watch the receiving display through a session, because the computer's preview alone does not show what reaches the TV. If the receiver is missing, check that it is on and connected to the same local network. If sending fails, follow the Cast status and reconnect once the equipment is available.

The second window remains available for a connected display. If your setup uses an NDI receiver, follow its dedicated guide, with that route's bridge and requirements.