How to cut and merge videos on PC with Windows 11/10

One of its biggest strengths is the ability to perform cuts and joins without re-encoding, which is extremely fast and preserves the original video quality. This is achieved by setting both the "Video Output" and "Audio Output" to the "Copy" mode. However, there is a technical limitation: when using "Copy" mode, your cuts must align with keyframes (also called I-frames). Avidemux helps you navigate between these keyframes using the up/down arrow keys, allowing you to place your A (start) and B (end) markers precisely at valid cut points.

How to Trim and Merge Videos on Windows 10 PC? The workflow for trim and merge videos on Windows 10 PC is straightforward:

1. To Trim (Cut):

• Open your video via File > Open.
• Use the slider or arrow keys to navigate.
• Set your start point (press A) and end point (press B) to select the portion you want to keep.
• Go to File > Save and choose a format (e.g., MP4) to export just that selected segment. Alternatively, you can use the "Delete" button to remove the selection and keep everything else.

2. To Merge (Append):

• Open the first video file with File > Open.
• Add subsequent videos with File > Append. Each clip will be added to a queue list.
• Once all clips are in the correct order, go to File > Save to merge them into a single output file. Note that for merging to work without re-encoding, all clips must have the same resolution, frame rate, and codec.

Avidemux is a practical and completely free solution for trim and merge videos on Windows 10 PC. It is particularly well-suited for tasks where you need to remove commercials, cut out unwanted sections, or combine multiple clips quickly without re-encoding. While it has the limitation of keyframe-aligned cuts in its fastest mode, it remains a reliable tool for users who prefer a GUI over command-line methods and want to avoid paid software.