QUOTE (DRUN @ Aug 2 2006, 07:19 AM)

I don't know whether this solves my problem. What I actually want to do is edit the VOB file (to remove unwanted scenes or to extract clips) by splitting it into several VOB files that I can then recombine at will
I recommend checking the Mac Forum at videohelp.com to see what info may be there about such things.
It's easy to extract parts of VOBs as separate MPEG files or to trim out parts you don't want into a single MPEG file using MPEG Streamclip. Toast will reauthor the editing MPEG(s) and create new VOBs when burning a new video DVD. The hard part about what you are wanting to do is putting separate MPEGs together into single files. An application called Capty MPEGEdit EX can join MPEGs together. It also has a frame accurate editing mode which is more precise than Streamclip. But it can only accept MPEGs, not VOBs, so you'll still need to use something like Cinematize or Streamclip to make the conversion. In order for the Capty MPEGEdit files to work with Toast you must use that application's option to save as separate video and audio streams.
Alternatively you can take your multiple MPEG files and drag them in the right order to Toast and choose the continuous play option when burning your new DVD. Although the files are separate titles they will play continuously one to the next (except there may be a slight freeze as each new title begins, depending on the player).