gistfile1.txt

First step:

Note that vf scale/expand sizes will need to be tweaked for different input sizes.

mencoder <input file> -o output.avi -vf scale=480:270,expand=0:-50:0:0:1,harddup -subfont-autoscale 0 -subfont-text-scale 20 -subpos 99 -subfont-blur 2 -subfont-outline 1 -noskip -mc 0 -oac faac -faacopts mpeg=4:object=2:raw:br=128  -ovc x264 -x264encopts bframes=0:nocabac:global_header:threads=2:no8x8dct 

Second step:

ffmpeg -i output.avi -acodec copy -vcodec copy <output file>.m4v