Skip to content
WorkflowVerifiedExternal
Open source

LtxAdd - V2V ADD AUDIO AND EXTEND ANY VIDEO (ltx2.3)

LtxAdd - V2V ADD AUDIO AND EXTEND ANY VIDEO (ltx2.3)

Sourcecivitai.com/models/2533889
TaskVideo to videoFamilyLTX-VideoVersionRelease 2847756 — LtxAdd.jsonEstimated VRAMNot yet characterizedBgrade

Runtime profile

Access
External workflow
Status
Verified
Version
LtxAdd.json
Source
Civitai
Updated
Oct 18, 2026

Source description

LtxAdd - V2V ADD AUDIO AND EXTEND ANY VIDEO (ltx2.3)

This is another App Mode I know I will use a LOT.

It will ADD AUDIO AND EXTEND any video!

I modified the original experimental following workflow from RUNEXX for my own needs

LTX-2.3_-_V2V_Foley_Add_Sound_To_Any_Video

Changed the models to the ones used by the Vanilla LTX2.3 Comfyui Template

so if you already have those original models it's an out of the box experience :)

Options:

Toggle between adding 10 or 20 seconds.

Toggle ON/OFF for Enhanced Prompt

Toggle to Add Custom LoRA

What you need

Model files
7.1 GiB known subtotal

Remaining hardware or download-size estimates are not available yet.

Requirements

Models

5

Node packs

4

AI-generated commentary

AI-generated explanation based on source and configuration details. Suggestions are clearly labeled.

Purpose

  • Use this workflow to add audio to an existing video and extend it by 10 or 20 seconds; the input is a video, and the output is an extended video with added audio.

Flow

  • Its processing path includes video loading, LTX-2 prompt generation, audio and video combination, and spatial upscaling.

Inputs and outputs

  • Input: an existing video.

  • Output: a video extended by the selected 10- or 20-second option, with added audio.

Setup

  • This is version v1.0 from WanApp, built on LTXV 2.3.

Dependencies

  • It requires these node packs: comfyui-easy-use, comfyui-kjnodes, ComfyUI-LTXVideo, and comfyui-videohelpersuite.

  • It lists these model files: gemma_3_12B_it_fp4_mixed.safetensors, ltx-2.3-22b-dev-fp8.safetensors, ltx-2.3-22b-distilled-lora-384.safetensors, ltx-2.3-spatial-upscaler-x2-1.1.safetensors, and LtxApp_LoRA.safetensors.

Configuration

  • Choose whether to extend the video by 10 or 20 seconds.

  • Turn Enhanced Prompt on or off.

  • Use the Custom LoRA toggle to add a custom LoRA.

Cautions

  • Before use, verify that ltx-2.3-22b-distilled-lora-384.safetensors and LtxApp_LoRA.safetensors are available.

    Suggestion · not verified

  • No license is specified for the workflow, so verify the applicable terms before use.

    Suggestion · not verified

Does this need to be edited?

Sign in to send an edit request.

Sources

1 source
CivitaiPrimaryVersion 2847756
civitai.com/models/2533889

Verified Oct 18

Source excerpts

3 excerpts
NoteOct 18civitai.com/models/2533889

Source context: 1075 downloads · Type Workflows · Base model LTXV 2.3

NoteAug 5civitai.com/models/2533889

Source context: 871 downloads · Type Workflows · Base model LTXV 2.3

NoteJul 28civitai.com/models/2533889

Source context: 841 downloads · Type Workflows · Base model LTXV 2.3