I looked through the thread and couldn't find this request specifically so I wanted to add it here so it's not forgotten as I know it has been mentioned in other areas of the forum in random locations.   It would be nice to be able to choose to perform a simple file remux to another container. Being able to choose what container would be needed as some of us would prefer MKV and some prefer MP4.    My experience with using MCEBuddy shows me that doing a  simple remux only takes about 2-5 min