I have several HD video files in transport stream (.ts) format, recorded with my satellite receiver.

I want to cut them, as in simply remove a few minutes from the beginning, the end and sometimes a few minutes in the middle of it (remove early start of recordings, late ends and, for some seldom files, the ads).

What is a good, ideally but not necessarily free, software with a GUI to do this? Best would be something where you could select points on a timeline and simply cut the elements out.

As a resulting file, just the same .ts format would be great, but I could also live with putting the video contents into another container, as long as the video is NOT re-encoded / transcoded.

The files have additional audio streams and subtitles. These should be retained in the process.

My OS is Windows.