“Cuttermaran is a cut program for MPEG1 or MPEG2 video streams. The streams can be cut without recalculation. The asynchronous between audio and video will be minimized. […] This program supports Mpeg1- and Mpeg2- video and Mpeg1, Mpeg2 (Layer I-III) audio, AC3 audio, DTS audio and PCM audio.”
An incredibly useful tool and what, at least to an amateur like myself, looks and feels like professional quality!