LosslessCut is a desktop application designed for the precise editing of video and audio files without re-encoding the underlying media streams. By performing stream copying and container remuxing, the software allows users to cut, merge, and rearrange media segments while maintaining the original bit-perfect quality of the source content.
The application distinguishes itself by utilizing a stream-copying data pipeline that transfers raw media packets directly from source to destination, significantly reducing processing time compared to traditional transcoding workflows. It also functions as a media container remuxing tool, enabling users to repackage streams into different file formats or structures without altering the data itself.
Beyond basic trimming, the tool provides capabilities for high-resolution frame extraction and comprehensive metadata management. Users can capture still images from specific timestamps or scene transitions and import or export timing data and chapter markers to synchronize editing projects with external professional tools. The application is distributed as a cross-platform desktop shell that provides direct access to local file systems for media processing.