During the encoding, the video MXF is created in the video folder.  When it is finished it is hard-linked into the DCP folder.  It's one file on the disc with two names, in effect.  Deleting one or the other will not delete the actual content; deleting both will.


The names of the files in the video folder consist of all the parameters of DVD-o-matic that affect the video output.  If you change one (e.g. crop, for example) a new MXF will be created.  This is so that DVD-o-matic doesn't get confused about encodes done with different parameters.