# Two pass encoding with mencoder
nice -n 15 mencoder "$1" -ovc xvid -nosound \
        -xvidencopts bitrate=3107:pass=1:hq_ac:vhq=1:me_quality=6:chroma_me:chroma_opt:max_bframes=2:quant_type=h263:trellis:interlacing:turbo -o /dev/null
nice -n 15 mencoder "$1" -ovc xvid -oac mp3lame -lameopts preset=128 \
        -xvidencopts bitrate=3107:pass=2:hq_ac:vhq=1:me_quality=6:chroma_me:chroma_opt:max_bframes=2:quant_type=h263:trellis:interlacing:psnr -o "$2"