Howie Fraser, PAL, NTSC, SECAM are obsolete analogue Television standards no longer broadcast, presumably you are referring to frame rate conversion from 25fps to 30fps and 30fps to 25fps... almost any of these FFMPEG based converters can do frame rate conversions with the inevitable compromises e.g. inserted duplicate frames or deleted frames both which can be visually distracting.

"Can this software convert regional formats, for example PAL to NTSC..."

It will convert the DVD's video to a standard digital format, e.g. AVC, that will be playable on any device that can play files in that format, for example a cell phone or tablet. Converting NTSC video to PAL & vice versa is really quite complicated, and was usually done to show EU movies on American TV channels using specialized analog hardware. I don't know if EU TV stations did the same thing with American TV content. Back when video DVDs were current, the common solution was DVD players that understood both -- AFAIK most EU DVD players also played NTSC DVDs.

TK, The TV cable company here in Antwerp (Belgium) stops distributing anologue TV channels at the end of September this year.

My media player will play them as if they were the actual DVDs. All menus, Extras, Commentaries etc. are intact in one file that I can play straight from the network. No need to get up and put a physical disk in a machine just select it from a menu and I'm watching a 'virtual' version of the entire DVD with its original resolution, sound and content.

Bz,
Thank you. And can that sound and content be sent via email as if the DVD was ripped "normally", i.e., not into an ISO image?

"What is the purpose to rip a DVD to an ISO image?"

There is none. Years ago [like a couple of decades] some DVD player software would only recognize a physical DVD or an ISO, which is an image of a DVD. Now every player that I'm aware of will recognize and work with video DVD files stored in the same folder arrangement as on the DVD.