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lossless-cut

How lossless-cut Works: Architecture & Code

Project Overview

LosslessCut is an Electron-based desktop application designed for fast, lossless cutting of video and audio files. It allows professional developers and general users to quickly trim media segments without re-encoding, preserving original quality and significantly reducing processing time. It achieves this by leveraging the powerful FFmpeg tool for media processing, wrapped within a user-friendly React-driven UI.

Category: desktop-app
Difficulty: intermediate
Tech Stack: JavaScript, Node.js, React, TypeScript
Tags: electron, ffmpeg, video

Key Modules & Components

Media File Handling and Metadata Extraction: Provides the capability to open, analyze, and extract metadata from various video and audio file formats using FFprobe. This module is crucial for initializing the application state with media information and preparing files for editing.
Lossless Cut Segment Management and Preview: Enables users to define precise cut points on a media timeline, create and manage segments, and preview these segments using Media Source Extensions (MSE) for frame-accurate playback without re-encoding. It provides the core editing functionality for lossless media trimming.
Lossless Export Processing: Orchestrates the lossless export of user-defined segments by constructing and executing FFmpeg commands, ensuring original media quality is preserved. This module manages output configuration and provides progress feedback to the user.
Application Configuration Management: Handles persistent application settings and user preferences, providing a centralized mechanism for managing and persisting application state across sessions. This module enables customization and consistent behavior across different application runs.
User Interface and Experience: Defines the structure and behavior of the graphical user interface. Encompasses the main application window, menus, event handling, and component rendering, providing the visual interface through which the user interacts with the application's functionality.