MJPEG Tools Svn

FreeBSD works now even with -M 2 specified to mpeg2enc. The problem was,
as suspected, that -pthread was not being used at compile and link time.
FreeBSD does not have -lpthreads nor integrated threads in libc, rather
a compiler option is used. The coredump in mpeg2enc was being caused by
pthread_attr_getstacksize() not being detected at ./configure time - and
the default stack size is far too small.

All better now.

autoconf's AC_SYS_LARGEFILE will do all the dirty work of finding the correct
flags for large file support. No need for a OS specific ("xLinux") check that
duplicates autoconf's builtin capabilities (which cover more systems anyhow).

Ifdef _SC_NPROCESSORS_ONLN since neither OS/X nor BSD/OS have it (they use a sysctl based method).

For FreeBSD 'isspace' isn't in the right places (string.h or memory.h or ...) but in ctype.h. Avoid this:
main.cpp: In member function `bool
CmdLineMultiplexJob::ParseWorkaroundOpt(const char*)':
main.cpp:497: `isspace' undeclared (first use this function)
main.cpp:497: (Each undeclared identifier is reported only once for each
function it appears in.)

when building on FreeBSD 5.1

Tidy up the split into the shared lib backed and the command line front-end
File I/O and command line subclasses all now in mpeg2enc.cc

Partition mplex2 into a seperately (dynamically) linkable C++ backend
and a front-end command line wrapper.

vcd-still-size to target-still-size, and autodetect number of CPUs as a default

Range check for act_boost corrected to agree with documentation.

initialize have_png to false so in case libpng is not found the summary does
not have an empty/blank entry instead of saying "false".

fixed the manpage description of the -c option. And a overflow, with the framerate ratios, noticed by Stephen Beahm