oggCut is able to cut video (theora) only files, audio (vorbis) only files or files with both video and audio streams.
The start and end time for the cut area must be given in milliseconds with the options -s and -e.
As a video stream consists of I‐frames (which are full pictures) and P‐frames (which are delta pictures to the leading I‐frame) the oggCut algorithm searches for the first I‐frame. If a video file would start with a p‐frame, the player is not able to interpret this picture, as the leading I‐frame (on where it is based) is not available. oggCut starts the I‐frame search at the start time given by the -s option. So expect a shorter video time than the calculated seconds for the new file.
oggCut does not do any reencoding, therefore the output quality is completely the same as from the input file.
For those involved into the ogg container format: The file is cut on packet basis, not on page basis.
There is another tool called oggCut out in the internet with a different synopis. This one has not been written by the author of this tool you are actually using.
Creates a new video called myOutput.ogv from the video myVideo.ogv starting after 1 second ending after 21 seconds