vMix actions: overlays, transitions, text, streaming, recording
Every vMix command you can trigger from Helmo Live buttons, rundown elements, and Action Sequences.
ReferenceIntermediateUpdated
Once vMix is connected, you can control it from Helmo Control buttons, rundown elements, and Action Sequences.
Available actions
Overlays and transitions
| Action | Description |
|---|---|
| Overlay In | Show an input on a specific overlay channel (1–4). |
| Overlay Out | Remove an input from an overlay channel. |
| Transition | Transition an input to program output using a specified effect (Cut, Fade, Zoom, Wipe, etc.). |
| Set Preview | Set an input to the preview bus. |
Text and images
| Action | Description |
|---|---|
| Set Text | Change a title's text content by field name. |
| Set Image | Change an input's image source (file path or URL). |
Streaming and recording
| Action | Description |
|---|---|
| Start Streaming | Start the vMix live stream output. |
| Stop Streaming | Stop the live stream. |
| Start Recording | Begin recording to disk. |
| Stop Recording | Stop recording. |
Other
| Action | Description |
|---|---|
| Snapshot | Capture a snapshot of the current output. |
Using vMix actions in Helmo Control
When creating a button in Control Builder:
- Select your vMix integration.
- Choose the action (for example, Overlay In or Set Text).
- Configure the parameters (for example, input number, overlay channel, or text content).
- The button sends the HTTP command to vMix when pressed.
Using vMix actions in Action Sequences
vMix actions can be chained with graphics, OBS, and other integrations in a single sequence. Example: Overlay In (lower third) → WAIT 5s → Set Text (update score) → WAIT 3s → Overlay Out.
Tips
- vMix inputs are referenced by number (1, 2, 3...) as shown in vMix's input list.
- Overlay channels are numbered 1 through 4.
- Text fields are identified by their field name as set in the vMix Title Designer.
- If using middleware, make sure Helmo Middleware is running on the same machine as vMix.