[MEncoder-users] lavs encoding and divx compatibility

[James Hastings-Trew]

Stjepan Brbot wrote:
> Hi,
>
> according to the specification my standalone DVD + DivX player Samsung
> DVD-V6500 does support:
>
> * Supported CODEC formats: DivX3, DivX4, DivX5 (GMC 1WP)
> * Supported file formats: *.avi, *.mpeg
> * Supported audio formats: AC3, MP3, WMA
> * Supported caption formats: * .SMI, * .SRT, * .SUB
>
> But it does not reproduce DivX created with mencoder when video codec is
> lavc (mencoder -ovc lavc). With xvid encoding everything is fine.
> According to mencoder documentation lavc encoding actually produce DivX
> coded movies.
>
> * What is the problem with compatibility of this lavc?
> * What this "GMC 1WP" in specification for DivX5 stands for?
> * Why xvid encoding is many times slower than lavc encoding?
> * What is lavc comparing to ffmpeg?
>   
Without your mencoder command line it's impossible to be specific, but a 
few pointers from experience:

-of avi -ffourcc DIVX-noodml -oac -oac mp3lame -lameopts 
mode=0:cbr:br=160 -ovc lavc -lavcopts 
vcodec=mpeg4:mbd=2:trell=yes:vbitrate=2500:vrc_maxrate=4000:vrc_buf_size=1835:threads=2

Give those options a whirl and see if your Samsung player likes the 
file. Some of them are also quite picky about pixel dimension. In 
general, don't go over DVD frame size - 720x480 (ntsc)