Best way to trim a large MP4 video without adding a watermark

If you want a graphical interface but still want lossless cutting, Avidemux is a great middle ground for How to trim mp4 video on Windows 11. It supports lossless MP4 cutting via copy mode without time-consuming re-encoding.

How to Trim MP4 Video on Windows 11

Step 1: Open the software and load the target MP4 file

Step 2: From the drop-down menu, set both the video output and audio output to Copy

Step 3: Drag the playback slider to the desired starting point, then press the A key to mark the starting point

Step 4: Drag the slider to the desired ending point, then press the B key to mark the ending point

Finally, click Save, enter a filename, and complete the operation

When editing videos on a computer, this software is a reliable choice. Editing takes only a few seconds rather than minutes, and processing is extremely fast.

Pros

• No embedded watermarks; open source
• Supports processing large video files

Cons

• Uses copy mode; editing is limited to keyframe positions
• Requires precise frame cutting, which necessitates re-encoding