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LtxAdd - V2V ADD AUDIO AND EXTEND ANY VIDEO (ltx2.3)
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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:
AI-generated commentary
AI-generated explanation based on source and configuration details. Suggestions are clearly labeled.
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.
Its processing path includes video loading, LTX-2 prompt generation, audio and video combination, and spatial upscaling.
Input: an existing video.
Output: a video extended by the selected 10- or 20-second option, with added audio.
This is version v1.0 from WanApp, built on LTXV 2.3.
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.
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.
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.
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Sources
1 sourceSource excerpts
3 excerptsSource context: 871 downloads · Type Workflows · Base model LTXV 2.3
Toggle between adding 10 or 20 seconds.
Toggle ON/OFF for Enhanced Prompt
Toggle to Add Custom LoRA
Remaining hardware or download-size estimates are not available yet.
Requirements
Text encoder · 8.80 GB · SAFETENSORS · bf16 · Hugging Face · Comfy-Org/ltx-2
VAE · 27.1 GB · SAFETENSORS · fp8 · full · Hugging Face · Lightricks/LTX-2.3-fp8
Source context: 841 downloads · Type Workflows · Base model LTXV 2.3
Source context: 768 downloads · Type Workflows · Base model LTXV 2.3
LoRA · 7.08 GB · SAFETENSORS · bf16 · pruned · Hugging Face · Lightricks/LTX-2.3
Upscaler · 950 MB · SAFETENSORS · bf16 · Hugging Face · Lightricks/LTX-2.3
LoRA · Hugging Face · WanApp/LtxApp
comfyui-easy-use
FoundNode pack · Registry
Node pack · Registry
ComfyUI-LTXVideo
FoundNode pack · Registry
comfyui-videohelpersuite
FoundNode pack · Registry
