MJPEG Tools Svn

Clean up a typo/spelling error or two. mp2enc is a MPEG-1 Layer II encoder,
not a MPEG-2 encoder so fix that reference as well.

Mainly changed motion-search, as all faster methods introduced visible
error. Now an exaustive-search with 16x16 search-radius and verification
in three(!) fields is used. This *IS* slow... but reliable.

png2yuv was missing from the list of manpages to install.

remove DVD VOB streams since they've been working for quite a while now.

Set the default number of cpus to 1 and _not_ the number that sysconf() reports.
Using sysconf() had the unfortunate side effect of *silently* changing the
behaviour of the encoder if you happened to be on a multicpu system. This
tended to produce different results when using the same mpeg2enc options on
different machines. It should also be noted that the resulting .m1v/.m2v file
is different when using -M 2 than it is when using -M 0 or -M 1 (bug? could be)

Update the filter description section to use the new Y4M API

Lingering unneeded PRId64 definition.

Remove unused variables so warning errors don't appear at compile time.

Remove the PRID64_STRING_FORMAT and PRId64 stuff and simply use %lld. The
only 2 uses of PRID64 and PRId64 were two debug statements mpeg2enc/ratectl.cc,
putseq.cc). Interestingly enough all the other int64_t printing was already
done with %lld ;)

More build improvements:

o Concocted a "ACX_CONFIG_PREFIXED_HEADER" macro, to create an installable
config header (mjpegtools-config.h -- not used yet)
o Removed extraneous AC_SUBSTS (that are already created within macros).
o Re-instate "HAVE_LIBDV" ac_define, which was accidentally axed earlier.
o Changed "dv", "quicktime", "png" to be consistently "libdv", "libquicktime",
and "libpng".
o Account for those changes in 'lavtools/Makefile.am'.
o A little modernization of 'lavtools/Makefile.am'