Changed to get lavencode_mpeg.c to be autoconfigured
First (possibly ;-)) working version of stills (VCD normal res only).
Some changes for stills streams.
Marvel changes: vc.maxwidth workaround, odd_even inverted
Portability slightly fixed
IRIX portability established
for commit after make
add new option -I to force interlace type
enable yuv420 software playback and some bug fix
fix lav_video_compressor() to return jpeg when movtar
