[MEncoder-users] RE： Re: RE： Re: converting and subtitle questions !

[Diogo Franco]

2008/3/20, zechao wang <wzc0066 at yahoo.com.cn>:
>
> My destination is mp4, and it's ovc and oac should  be xvid and aac, or it
> could not be played in my cellphone.


The ovc doesn't matter, as long as it outputs MPEG-4 Part 2. Xvid, Divx and
lavc MPEG-4 are all compatible. You just need the right fourcc if you're
using avi, but since you are using mp4, it doesn't matter.

Also, as you are using a cellphone, avoid at most the cpu-heavy codec
options and downscale your movie with -vf scale if needed. Check the
cellphone manual for information on the supported mpeg features. See also if
it uses the Divx profiles or the official MPEG profiles, they are different.

I have searched about mp4box, and i found it has nothing to do with Linux.
> All documentation and software are based on Windows(but i have no
> Windows).


I think the ffmpeg command line you are using is fine too (can't test now).
You can even leave the '-f mp4' out.

>  If i want to use "-ovc xvid -xvidopts $str", what the $str should be here
> to instead of "-ovc lavc -lavcopts
> vmax_b_frames=2:vb_strategy=0:brd_scale=2:mbd=2:trell:v4mv:last_pred=3:predia=3:dia=3:cbp:preme=2:vqcomp=0.6:vbitrate=600:vpass=2:turbo"
> ?


If you really want to use xvid, see the man page. Also, you could put
'vcodec=libxvid' among the lavcopts and it would use xvid internally and you
could leave the rest of the parameters as-is, but the default mpeg4 may be
better.