See the source code of the script in the SVN of the project to verify this:
Go to line 3417 in the following file: http://dvd-slideshow.svn.sourceforge.net/viewvc/dvd-slideshow/dvd-slideshow?revision=45&view=markup The author sets a variable "subsample" there which is concatenated to each call of "ppmtoy4m". -- ppmtoy4vm requires "-S 420mpeg2" https://launchpad.net/bugs/5910 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
