About LosslessCut
LosslessCut is a video and audio cutting application created by Mikael Finstad. You mark the segments to keep or drop and then export, giving priority to copying streams that are already compressed. Within the category of creative tools for Windows, it earns its place for trimming down a long recording, pulling out individual passages and getting files ready ahead of editing. FFmpeg powers what it does under the hood, while the interface shows the media along with the boundaries of each segment.
Copying streams without re-encoding can spare you full image processing, yet it comes with constraints. For certain codecs, a clean cut hinges on where the keyframes sit and on which export mode you pick. The container in use and the tracks you retain shape the outcome as well. It would therefore be misleading to describe LosslessCut as a complete editor that lays down arbitrary effects with no processing at all. For this page, the Windows reference is the stable x64 archive. The project flags a specific issue in the ARM64 package carrying the same version number; its guidance should not be mixed up with that of the x64 package covered here.
Set up segments before you launch the export
Load your file and track down the passages you want to keep. Place the boundaries of each segment, then run through their order and names. A tidy list makes it easier to prepare several extracts drawn from the same recording. Before a lengthy export, try a short segment that spans an important transition. Look at the start and the end of the file you produced, not merely the preview inside the program. A gap of a few seconds is enough to distort the meaning of an explanation or clip a word. Hold on to the source media so you can reset the boundaries without leaning only on already exported files or their names.
Grasp how keyframes govern precise cuts
A compressed video stream does not hold a fully self-contained image at every moment. Some of the images are rebuilt from other information. A cut made by plain copy has to work with this structure. Depending on the mode you pick, the exported start may snap to a keyframe instead of landing exactly on the point you asked for. Study how your own file turns out and lean on the program's cues. Options aiming for different precision sometimes come with conditions or call for extra processing. So do not promise a frame-accurate cut without first checking the codec and the method.
Keep the right tracks and a suitable container
A file can bundle several audio tracks, subtitles and metadata. Pick the ones to keep rather than assuming that an extension sums up all the content. The output container has to accept the streams you selected. Merely changing the extension never converts an incompatible codec. Try the file in the intended player and check the language, subtitles and timing. When preparing several versions for different audiences, give them distinct names and note the tracks you kept. That way you avoid sending an extract that looks fine but carries an audio track that does not fit.
Join files after checking their compatibility
Joining segments or files depends on their characteristics. Videos that look alike may rest on different codecs, dimensions or settings. Before processing a whole batch, compare a few files and validate a short result. An operation without re-encoding does not on its own smooth over every difference between sources. Also check the chapters and the retained information if the recipient relies on them. As soon as the project calls for transitions, titles or compositing across several tracks, editing software is often the better fit. Keep a simple method for tying each export back to the sources you used.
Unpack the right Windows distribution
The official repository provides a 7z archive for Windows x64. Extract the whole package into a folder before you launch the executable. Both 7-Zip and PeaZip are fine for this step. Do not reach for an APPX file that the project instructions clearly mark as unusable. The stable 3.69.0 version also carries a warning about FFmpeg in its Windows package ARM64; this page does not present that package as a functional equivalent. Read the release notes and work out your computer's architecture. Older editions of Windows fall under support limits that differ from those of today's Windows systems.
Decide between cutting, editing and converting
Shotcut and VEGAS Pro serve to build a montage with tracks, effects and rendering. Movavi Video Converter answers the need for format conversion, while VLC media player lets you check a result in a separate player. LosslessCut leans on preparing segments and streams when you want to steer clear of needless re-encoding. The right tool therefore follows from the change you are after. Removing the opening of a recording is nothing like adding a title or altering every dimension. Try a representative case and compare the accuracy, compatibility and processing time you actually observe.
Key features
- Marking the segments to keep or discard.
- Export giving priority to copying compatible streams.
- Adjusting boundaries according to the keyframes.
- Selecting audio tracks and subtitles.
- Building several extracts from a single source.
- Assembling files according to their technical compatibility.
- Reviewing the characteristics ahead of export operations.
- Windows x64 distribution supplied as an archive to unpack.
System requirements
Windows 10 or 11, x64; Windows 8.1 and earlier are unsupported. Minimum RAM and disk requirements are not confirmed.
How to install
- Open the stable release from the official repository and download LosslessCut-win-x64.7z for a compatible Windows x64.
- Unzip the entire archive with 7-Zip or another compatible tool, into an accessible folder.
- Run LosslessCut.exe from this folder, leaving the other files in the package in their places.
- Open a short test video, set a segment and review the exported file in your player.
