(S)VCD2DVDMPG is intended to help users to author DVDRs based on (S)VCD content. The standard process for achieving this is quite convoluted (when achieving high compatibility) and involves numerous steps. These steps require a lot of human intervention and are typically:
convert (S)VCD .bin images to mpgs
demux mpgs to elementary streams (ES)
resample the audio ES from 44.1 KHz to 48 KHz
patch the video ES to DVD horizontal resolution
optionally remux the ES streams into a mpg program stream (PS)
Repatch VOB files after DVD authoring
Given that we can, in theory, put 5 SVCD and many more VCD images onto one DVDR, we're talking a lot of work both computationally and - more importantly - by the user. All this before we even start authoring the DVD!
(S)VCD2DVDMPG helps by automating all the above steps whilst allowing certain settings to be set for a given situation.