PRECUT

PRECUT is a ComfyUI custom node pack for media editing utilities.

The first node in the pack is Media Cutter: a visual video/audio trimmer with an interactive timeline, waveform, IN/OUT markers, playback controls, and separate VIDEO, AUDIO, and DURATION outputs.

Media Cutter

Video

Audio

What It Does

• Loads video or audio from a connected ComfyUI input node.
• Loads video or audio directly from disk into ComfyUI/input/PRECUT/.
• Shows a visual timeline with waveform, timecodes, playhead, and draggable IN/OUT selection.
• Trims connected VIDEO inputs and returns the trimmed video plus extracted audio.
• Trims connected AUDIO inputs and returns the selected audio range.
• Trims loaded media files and returns VIDEO, AUDIO, and the selected duration in seconds.
• Supports resizing the node and timeline without pushing the controls out of place.
• Keeps the node display name as Media Cutter under the PRECUT category.

Inputs

• video optional VIDEO: connect a ComfyUI video source.
• audio optional AUDIO: connect a ComfyUI audio source.

Connect either video or audio, not both, when using connected media inputs.

Outputs

• VIDEO: the selected video range, or None for audio-only media.
• AUDIO: the selected audio range.
• DURATION: selected IN-to-OUT duration as a float in seconds.

Installation

Install with Git

1. Open a terminal in your ComfyUI custom_nodes folder.

   Portable Windows example:

   cd /d "E:\COMFY UI\ComfyUI\custom_nodes"

2. Clone PRECUT:

   git clone https://github.com/younestft/ComfyUI_PRECUT.git

3. Restart ComfyUI.

4. In ComfyUI, right-click the graph and add:

   PRECUT > Media Cutter
   

Install Without Git

1. Download the repo ZIP from GitHub.

2. Extract it into:

   ComfyUI/custom_nodes/ComfyUI_PRECUT
   

3. Restart ComfyUI.

Requirements

• ComfyUI with Python 3.12 portable is supported.
• FFmpeg is required for media probing, waveform generation, and audio extraction.
• PRECUT will try to use FFmpeg from imageio-ffmpeg, system PATH, PRECUT_FFMPEG_PATH, or VHS_FORCE_FFMPEG_PATH.

Controls

• LOAD MEDIA INPUTS: load the connected VIDEO or AUDIO input into the timeline.
• LOAD MEDIA FILE: upload a local media file into ComfyUI/input/PRECUT/.
• IN / OUT buttons: set the selection markers at the current playhead.
• Drag the yellow IN/OUT handles to adjust the cut range.
• Drag inside the selected range to move the whole range.
• Drag the blue playhead or click the timeline to seek.
• Mouse wheel over the timeline: zoom in or out around the playhead.
• Double-click the grey navigator bar: reset to full timeline view; double-click again to restore the previous zoom.
• Drag the grey navigator window or its side handles to pan/adjust the visible timeline range.
• Space: play/stop.
• Left / Right arrows: previous/next frame.
• Up arrow: go to IN.
• Down arrow: go to OUT.
• Loop button: loop playback from IN to OUT.

Notes

• The internal legacy node id remains PRECUT for workflow compatibility, but the node is displayed as Media Cutter.
• FFmpeg is required for media probing, waveform generation, and audio extraction. PRECUT uses imageio-ffmpeg, PATH FFmpeg, or PRECUT_FFMPEG_PATH / VHS_FORCE_FFMPEG_PATH when available.
• Uploaded and registered media files are resolved through ComfyUI's input directory.