[mythtv-users] Rerecording to overwrite?

[Jim Reith]

Is it possible to set up MythTV to re-record previously recorded shows that
still exist in the database? I have 2 months worth of shows recorded at
480x480 that I would like to re-record at 720x480 but i don't want to
delete the 480x480 shows prior to them coming back on in case I want to
re-watch them. The 480x480 plays fine but is a hassle putting on DVD
(Martin has explained to me a way I can re-encode them when transferring
but I'd prefer to have the larger size when it becomes available) is this
possible? (oh, and I only want to do it against my 480x480 recordings so
something on a per recording basis is probably preferred)

Jim (not home where I can poke around my Myth box to check)