Added the handle_args_dependent prototype
Interlacing defaults and treatment revisited, notably conversion from/to interlaced to/from not-interlaced. Ready for the YUV4SCALER header
First UPscaling capable version
minor bugfix: no more might be used uninitialized
new pgcd function working with upscaling, generalized use of mjpeg_xxxx functions
Man page for the UPscaling capable version of yuvscaler
Bug correction on info_str declaration. Added version printing
Now using the new YUV4MPEG header => no more interlacing keywords needed, the LINE_SWITCH keyword being added for field inversion. FATSVCD added. Does not take aspect ratio into account yet. Various code cleanings