Lossless Cut — Manual Portable

Upon opening LosslessCut, you are greeted with a clean, dark-themed interface designed for efficiency.

Since you cannot cut on non-keyframes, you must snap to them.

is the ultimate open-source tool for trimming and cutting video and audio files without losing any quality [6]. It is incredibly fast because it does not decode or re-encode your files [1, 2]. Here is your comprehensive manual to mastering LosslessCut. 🚀 The Core Workflow lossless cut manual

You can drag and drop your video file directly into the application window or use Ctrl + O (or Cmd + O on Mac). 2. Core Editing: Trimming and Cutting

Cuts can only be made at key frames unless using the "smart cut" feature (which re-encodes only cut points). Upon opening LosslessCut, you are greeted with a

If you want to delete the last 5 seconds of a video:

You are using "Smart Cut" (lossless re-encode) instead of "Stream Copy." Fix: In the export dialog, ensure the mode is "Copy" (yellow icon) not "Encode" (blue gear icon). It is incredibly fast because it does not

To finalize this manual, let's place Lossless Cut in context.

: Click the Export button (bottom right) to save the cut segment instantly [5]. ⌨️ Essential Keyboard Shortcuts

icon). When you export, LosslessCut can either save them as separate files or them into one seamless video. Keyframe Cutting: