Change container without quality loss:
ffmpeg -i georgie_mandy_s01e14.mkv -ss 00:12:34 -to 00:15:45 -c copy cut_scene.mkv georgie & mandy's first marriage s01e14 ffmpeg
for f in *S01E*.mkv; do ffmpeg -i "$f" -c:v libx265 -crf 22 -c:a aac -b:a 128k "hevc_$f%.mkv.mp4" done georgie & mandy's first marriage s01e14 ffmpeg