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

If you’re looking for a lossless AVI editing tool that was popular in the 2000s, VirtualDub2 is a great option. The software supports newer versions of the MP4 format. It uses direct stream copying to edit videos without re-encoding, making it a reliable solution for How to trim mp4 video on Windows 11.

It can quickly perform lossless editing without any loss of video quality, but it has some limitations regarding compatibility with newer video encoding formats.

• First, launch the software and click File → Open to load the target MP4 video.
• Move the playback slider to the start of the clip, then click the Mark Start button.
• Move the slider to the end of the clip and click Mark End.
• Open the Video menu and switch the setting to Direct Stream Copy.
• Open the Audio menu and select Direct Stream Copy as well.
• Click File → Save As AVI.

The default output format is AVI; you can manually change the file extension to MP4.

The exported video will not contain a built-in watermark. The tool cannot process videos encoded with newer codecs such as H.265/HEVC. If your MP4 file uses standard H.264 encoding, it will work perfectly.

If you primarily edit H.264 MP4 videos and are looking for ways to How to trim mp4 video on Windows 11, this software is a lightweight, lossless editing alternative worth trying.

Notes

• For lossless editing, be sure to set both the video and audio options to “Direct Stream Copy.”
• Frame-level editing is not possible in Stream Copy mode; to perform precise editing, you must enable the re-encoding feature.
• Do not directly change the file extension of H.265 videos, as this will result in a format conversion error.