help authoring dvd

Hi,

I was using dvdauthor in the past and never remember having much of a problem.  I used this for simple dvd:

mkdir DVD && export VIDEO_FORMAT=NTSC && dvdauthor -o DVD --title -f input.vob && dvdauthor -o DVD -T

But I notice recently it seems to not autoplay (or play at all) in many players and I'm not sure what went wrong?  Unless this started happening with the release of Mountain Lion (I'm using Mac) I'm not sure also?  Can someone tell me if anything looks wrong with my command line?  The structure created and everything appears to be just fine and no errors are generated, but still having this autoplay issue.  Thanks!

rc
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