Video Audio Fix node for ComfyUI (MiniMax, LTX, Wan, HunTuan, Cosmos)

A compact ComfyUI custom node that restores a video's default audio track, merges it into the selected MP4 or MKV container, saves the result, shows an inline video preview, and provides a stacked spectrogram image output for before/after comparison.

Before run the workflow, do install:

1. Clone the repository into ComfyUI/custom_nodes:

   cd ComfyUI/custom_nodes
   git clone https://github.com/Merserk/ComfyUI-Video-Audio-Fix.git

2. Run install.py with the Python used by ComfyUI.

   Windows Portable, from the ComfyUI_windows_portable directory:

   .\python_embeded\python.exe .\ComfyUI\custom_nodes\ComfyUI-Video-Audio-Fix\install.py

GitHub link: https://github.com/Merserk/ComfyUI-Video-Audio-Fix

Audio comparison: https://drive.google.com/drive/folders/1aKuP7FjGEBJpOj5CWG0RB-qfC2QXMjd5?usp=sharing

Patreon (support): https://www.patreon.com/mm744