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# ComfyUI Sharp Frame Selector # 🔪 ComfyUI Sharp Frame Selector
A custom node for [ComfyUI](https://github.com/comfyanonymous/ComfyUI) that automatically filters video frames to select only the sharpest ones. A suite of custom nodes for [ComfyUI](https://github.com/comfyanonymous/ComfyUI) designed to intelligently extract the sharpest frames from video footage.
This is a ComfyUI implementation of the logic found in [sharp-frames](https://github.com/Reflct/sharp-frames-python). It calculates the Laplacian variance of each frame to determine focus quality and selects the best candidates based on your chosen strategy. Based on the [sharp-frames](https://github.com/Reflct/sharp-frames-python) logic, this tool uses **Laplacian Variance** to score image clarity. It is optimized for high-resolution video processing using a **Sidechain Workflow** that saves massive amounts of RAM.
## Features ## ✨ Key Features
- **No external CLI tools required**: Runs entirely within ComfyUI using OpenCV. * **Sidechain Optimization:** Analyze lightweight 512px proxy images to control the selection of heavy 4K raw frames.
- **Batched Selection**: Perfect for videos. Divides the timeline into chunks (e.g., every 1 second) and picks the single sharpest frame from that chunk. Ensures you never miss a scene. * **Batched Extraction:** Splits video into time slots (e.g., 1 second) and picks the single best frame from each slot. Perfect for ensuring action scenes are not missed.
- **Best-N Selection**: Simply picks the top N sharpest frames from the entire batch, regardless of when they occur. * **Threshold Filtering:** Automatically discards frames that are too blurry, even if they are the "winner" of their batch.
- **GPU Efficient**: Keeps image data on the GPU where possible, only moving small batches to CPU for the sharpness calculation. * **Buffer Control:** Optional dead-zones between batches to reduce frame count or ensure temporal separation.
## Installation ---
### Method 1: Manager (Recommended) ## 🚀 Installation
If this node is available in the ComfyUI Manager, search for "Sharp Frame Selector" and install.
### Method 2: Manual ### Option 1: ComfyUI Manager (Recommended)
1. Open ComfyUI Manager.
2. Search for **"Sharp Frame Selector"**.
3. Click **Install**.
### Option 2: Manual Installation
Clone this repository into your `custom_nodes` folder: Clone this repository into your `custom_nodes` folder:
```bash ```bash