i use mencoder with NUL option for first pass...
Code:
mencoder.exe %%f -o NUL -ovc frameno -nosound -noskip -mc 0
and to render file
Code:
mencoder.exe %%f -o %%~nf.avi -ovc lavc -lavcopts vcodec=mjpeg -oac copy -noskip -mc 0 -ofps 25 -vf crop=1382:1036:29:22,scale=1280:720
pozdrawiam