Both, but especially authoring software. As an example I have a Panasonic E30 that I use to archive my old tapes. I have just started to copy these files in the PC from the DVR-RAM disc, change file extension to mpg, bring into Ulead Workshop ( with the AC3=1 mod ) and author a DVD. It would be nice to be able to bring these files into an editing program and edit as well as author. FOr new material I would want to edit DV files and then encode with AC3 for authoring a DVD. I would like both please!!! Now that Sony has started to produce DVD-RAM camcorders I can see more use for an editing program that will manage VRO files with AC3 encoding too.