mencoder input_file -o out_tmp.avi -vf scale=480:272,harddup -af channels=2 -ofps 25 -srate 44100 -oac faac -faacopts br=128:mpeg=4:object=2 -ovc x264 -ffourcc avc1 -x264encopts bitrate=410:me=hex:level_idc=13:keyint=250:frameref=3:bframes=1:threads=auto -aspect 16:9 -mc 3 -subfont "path to font for subs" -subpos 100 -subcp cpUnicode -subfont-text-scale 3
	mencoder out_tmp.avi -ovc copy -nosound  -of rawvideo -o out_tmp.264
	mencoder out_tmp.avi -ovc frameno -oac copy -of rawaudio -o out_tmp.aac
Then making it together into mp4 with mp4box by passing next parameters
	mp4box -fps 25.000 -add out_tmp.264 -add out_tmp.aac -new out_final.mp4