You did not say what the analog source was or whether you wanted to transcode in real time (on the fly).
It may be easier to transfer the file (video, movie etc) from your analog source onto your drive and
then convert the file after.
There are plenty of links on google, I've found a couple to get you started:http://www.howtogeek.com/108584/how-to- ... -avidemux/http://en.linuxreviews.org/HOWTO_Convert_video_fileshttp://ubuntuforums.org/showthread.php?t=1357157
The last link is probably the bestt o start with as Mint is a clone of Ubuntu all commands should work.
The links also provide alternatives to transcode and vlc such as avidemux so there is plenty of choice