Audio Duration (ComfyUI Custom Node)

Returns the duration of an audio source, which can be provided either as a filesystem path or as raw audio data (samples and sample rate) from an upstream node. Duration calculation primarily uses ffprobe (from FFmpeg) for paths, or calculates the duration directly from samples/SR if no path is available.

Install

1. Ensure FFmpeg is installed and ffprobe is on your PATH.
2. Copy this folder into ComfyUI/custom_nodes/comfy-audio-duration/.
3. Install Python dependencies: This node requires scipy to save raw audio data to a temporary file for duration probing.

   pip install -r requirements.txt
   # OR: pip install numpy scipy
   

4.  Restart ComfyUI.

## Node

**Category:** `audio/utils`
**Name:** `Audio Duration`

### Inputs

The node will prioritize a connected `audio` object over the `audio_path` string.

  - `audio_path` (STRING): Absolute or relative path to an audio file. If left empty, the node will use the `audio` input.
  - `audio` (AUDIO, optional): An upstream audio object, which may contain a path, a pre-computed duration, or raw samples and sample rate.

### Outputs

1.  `seconds_int` (INT)
2.  `seconds_float` (FLOAT)
3.  `minutes_int` (INT)
4.  `minutes_float` (FLOAT)

## Troubleshooting

  - **`RuntimeError: Provide either a valid audio_path or connect an AUDIO input...`**:

      * The node could not find a file path in `audio_path` or in the connected `audio` input.
      * The connected `audio` object does not contain a file path and the node failed to extract valid audio samples and sample rate.
      * **Fix:** Ensure the upstream audio node has successfully loaded an audio file, or manually provide a path in the `audio_path` field.

  - **`ImportError: scipy not found. Please install it...`**:

      * You are attempting to use the node with raw audio data (samples/sr) but the necessary `scipy` library is missing.
      * **Fix:** Run `pip install scipy` in your ComfyUI environment.

  - **"ffprobe not found"**: Install FFmpeg and make sure `ffprobe` is available in your shell (on Windows, either add `ffprobe.exe` to PATH or place it next to the ComfyUI executable).

  - **Non-numeric duration**: The file may be corrupt; try remuxing.

  - **IMPORT FAILED / 0.0 seconds** on Windows portable builds usually means Python couldn’t import the package (before your code even runs). Most common causes:

    1)  **Folder name has a hyphen** (e.g., `comfy-audio-duration`). Python packages can’t be imported with hyphens. **Rename the folder** to `AudioDurationNode` or `comfy_audio_duration`.
    2)  **Missing `__init__.py`** or wrong file casing.
    3)  **Syntax error** from copy/paste.