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Using Utility Nodes in Workflows


Introduction

Utility nodes expand your creative control within Workflows by allowing you to edit, extract, and manipulate media without leaving the Workflow Editor. These nodes bridge the gap between generation and post-production, enabling you to refine your outputs and build more sophisticated pipelines.

Use utility nodes when you need to:

  • Isolate or swap audio tracks from generated videos
  • Combine multiple video generations into a single sequence
  • Extract specific frames for use as images or generation inputs
  • Adjust video length to meet exact specifications

Utility nodes work with your generated or uploaded media, allowing you to transform videos and audio directly within your Workflow.

 

Extract Audio

The Extract Audio node pulls the audio track from a video input, outputting it as a standalone audio file.

Inputs: Video
Outputs: Audio

When to use it: Pull the audio track from a generated video to reuse across multiple scenes, or isolate specific sound effects or dialogue to repurpose in other projects.

How to use:

  1. Link a Video output to the Extract Audio node's video input
  2. Run the node
  3. The extracted audio will be available as the node's audio output

 

Add Audio

The Add Audio node combines a video input with an audio input, replacing the original audio track.

Inputs: Video, Audio
Outputs: Video

When to use it: Replace generated audio with custom music, voiceover, or sound design to match your creative vision or brand requirements.

How to use:

  1. Link a Video output to the Add Audio node's video input
  2. Link an Audio output to the Add Audio node's audio input
  3. Run the node
  4. The output video will contain your original video with the new audio track

 

Stitch

The Stitch node combines multiple video inputs into a single sequence, playing one after another in order from Input 1 to the final input.

Inputs: Video (multiple)
Outputs: Video

When to use it: Create multi-scene narratives by combining separate video generations into one continuous piece, or build product demos by stitching together different angles and features.

How to use:

  1. Link Video outputs to the Stitch node's inputs in your desired order (Input 1 plays first, Input 2 plays second, etc.)
  2. Add additional inputs as needed by clicking the + button on the node
  3. Run the node
  4. The output will be a single video with all inputs combined in sequence

 

Extract Frame

The Extract Frame node allows you to select and extract a specific frame from a video as a high-quality image.

Inputs: Video
Outputs: Image

When to use it: Capture a specific hero moment from your video to use as a thumbnail, marketing asset, or starting image for another generation.

How to use:

  1. Link a Video output to the Extract Frame node's video input
  2. Run the node
  3. Scrub through the video preview to find your desired frame
  4. The selected frame will be available as an image output

 

First Frame

The First Frame node automatically extracts the opening frame from a video input as a high-quality image.

Inputs: Video
Outputs: Image

When to use it: Grab the opening frame to verify your first frame reference was applied correctly, or use it as a consistent starting point when creating variations.

How to use:

  1. Link a Video output to the First Frame node's video input
  2. Run the node
  3. The first frame will automatically be extracted as an image output

 

Last Frame

The Last Frame node automatically extracts the final frame from a video input as a high-quality image.

Inputs: Video
Outputs: Image

When to use it: Use the final frame of one generation as the first frame input for the next to create seamless scene-to-scene continuity, perfect for building longer narratives.

How to use:

  1. Link a Video output to the Last Frame node's video input
  2. Run the node
  3. The last frame will automatically be extracted as an image output

 

Trim Video

The Trim Video node shortens a video input to a specified duration.

Inputs: Video
Outputs: Video

When to use it: Cut longer generations down to exact durations for social media specs, or remove unwanted sections from the beginning or end while keeping your core content.

How to use:

  1. Link a Video output to the Trim Video node's video input
  2. Set your desired duration (must be shorter than the original video)
  3. Run the node
  4. The output will be your trimmed video at the new duration

 

Reverse Video

The Reverse Video node automatically reverses both the video and audio of your input, playing it backwards from end to start.

Inputs: Video 
Outputs: Video

When to use it: Create rewind effects, time-reversal sequences, or reveal a process in reverse order. Useful for creative transitions, "going back in time" narratives, or showing cause-and-effect relationships from an unexpected angle.

How to use:

  1. Link a Video output to the Reverse Video node's video input
  2. Run the node
  3. The reversed video (with reversed audio) will be output and ready to use

 

JSON Parse Node

The JSON Parse node extracts multiple values from structured JSON outputs using JSON Path syntax, allowing you to break down a single LLM response into many separate text values.

Inputs: Text (JSON)
Outputs: Text (up to 12 outputs)

When to use it: Break down a structured LLM response containing multiple scenes into individual prompts for different nodes that receive text inputs, extract different variations (time of day, weather, styles) from a single description to route to different outputs, or isolate specific text values like character descriptions, camera angles, and environments to use throughout your workflow.

How to use:

  1. Connect a Text output (typically from an LLM node) containing JSON to the JSON Parse node's input
  2. Enter JSON Path expressions in the path fields (e.g., scenes.0.prompt, environment.description)
  3. Run the node
  4. Hover over each output icon to preview the extracted value
  5. Connect the extracted text outputs to other nodes in your workflow

Note: The node supports up to 12 paths, runs at no cost, and returns empty text for non-matching paths. Leave a path field empty to return the entire JSON output.

 

Common JSON Path Commands

Get a single item:

  • prompt - Get the prompt
  • description - Get the description
  • character - Get the character

Get items inside items:

  • scene.prompt - Get the prompt from inside scene
  • character.name - Get the character's name
  • environment.lighting - Get the lighting from environment

Get items from a list:

  • scenes.0.prompt - Get the first scene's prompt
  • scenes.1.prompt - Get the second scene's prompt
  • shots.0.camera - Get the first shot's camera angle
  • variations.2.style - Get the third variation's style

Get items nested deeper:

  • character.outfit.color - Get the color of the character's outfit
  • property.interior.kitchen.style - Get the kitchen style
  • shots.0.lighting.type - Get the lighting type of the first shot

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Next steps

Now that you understand utility nodes, explore the Workflow Library to see how these nodes work in pre-built pipelines, or experiment by adding them to your existing Workflows to streamline your creative process.

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