Demux · Audio Track

Extract the audio stream from a video container as COMFYTV_AUDIO. PyAV — pairs with Demux · Silent Video.

Demux · Audio Track · screenshot coming soon

What this node does

Demux · Audio Track reads audio from COMFYTV_VIDEO and writes a standalone audio file (/view? URL). For picture-only, use Demux · Silent Video.

Toolbar 🔀 Demux on upstream video stages creates both Audio Track + Silent Video nodes wired automatically.

When to use it

• Pull BGM / dialogue for Audio Stage or IA2V
• Feed Vocals Only (Demucs — ⏳ pending)
• Replace audio: Silent Video + new audio (ffmpeg / future Timeline)

How it works

• Stage + ▶ Run; PyAV demux_audio, no GPU.
• Snapshot: audio URL persisted in project.
• Shares source video snapshot with Silent Video; separate Run outputs.

Types

ComfyTV type	What it is	vs ComfyUI
COMFYTV_VIDEO	Input video snapshot	Not VIDEO
COMFYTV_AUDIO	Output audio snapshot	Not AUDIO dict

bridges.md

Parameters

video

Source COMFYTV_VIDEO. Required.

Outputs

Output	Type	Downstream
audio	COMFYTV_AUDIO	Video Stage (IA2V), Audio Stage, ← ComfyTV Audio

Step by step

1. Run upstream Video Stage or Load Video.
2. Add Demux · Audio Track or click 🔀 Demux on upstream toolbar.
3. ▶ Run.
4. Wire audio to Video Stage audio (IA2V) or Vocals Only (pending).

Full guides (recommended reading)

This page covers one node only. For end-to-end workflows, multi-stage pipelines, type conversion, and design rationale, see the ComfyTV user guides on GitHub:

Guide	Contents
Getting started	Install, canvas basics, per-stage Run, snapshots, Project, Image Picker
Video and audio	Clip, crop, resize, extract frame, demux vs Generate video

Repository and workflows

Resource	Link
GitHub repository	https://github.com/jtydhr88/ComfyTV
User guides index	https://github.com/jtydhr88/ComfyTV/tree/main/docs
Built-in workflows	https://github.com/jtydhr88/ComfyTV/tree/main/workflows
Model checklist	https://github.com/jtydhr88/ComfyTV/blob/main/docs/models.md
Custom workflows	https://github.com/jtydhr88/ComfyTV/blob/main/docs/custom-workflows.md

FAQ

Q: No audio stream?
A: Source may be silent; PyAV may error or write empty output.

Q: Where is Demux button?
A: 🔀 Demux on upstream video stage toolbar.

Q: Native AUDIO?
A: Add ← ComfyTV Audio.

Related nodes

• Demux · Silent Video
• Vocals Only / Background Only (pending)
• Video Stage (IA2V)