[MEncoder-users] need to add audio to movie question

[Tom Poe]

I used:
.ogg audio file
*.png images for video
ran:
mencoder mf://*.png -delay 20 -mf w=320:h=240:fps=5:type=png -ovc copy 
-audiofile Open_Studios_theme.ogg -oac copy -o test.avi

Now, what do I change in command to convert to new.mp4?
$ mencoder test.avi -o new.mpg -ofps 25 -vf scale=352:288,harddup -of 
lavf -lavfopts 
format=mpg:i_certify_that_my_video_stream_does_not_use_b_frames -oac 
lavc -lavcopts acodec=mp2:abitrate=224 -ovc lavc -lavcopts 
vcodec=mpeg1video:vrc_buf_size=327:keyint=15:vrc_maxrate=1152:vbitrate=1152:vmax_b_frames=0

The above command created a .mpg movie.  I want to make the .avi file 
compatible with as many players as possible.  I am computer-challenged, 
and my efforts to add mp4creator have thus far been futile.  Can I use 
mencoder, or not?  :)
Thanks, Tom