[MEncoder-users] Encoded DVD's appear too short

[Rich Felker]

On Mon, Nov 07, 2005 at 08:42:13PM -0600, Ben Nemec wrote:
> Just a minor niggle here with the DVD's that I encode using MEncoder.  For 
> some reason the lengths of tracks that I encode with it show up about half as 
> long as they should in lsdvd and my standalone player.  I think MPlayer pre7 
> may have identified them that way too, although I'm using current CVS now and 
> it gets the lengths right.  I've double-checked my command-line options and 
> as far as I can tell they're okay.  Here's my command-line (with line breaks 
> added):
> 
> mencoder "$infile" -of mpeg -vf scale=720:-2,expand=720:480,harddup\
>  -oac lavc -ovc lavc -lavcopts acodec=ac3:abitrate=192:vcodec=mpeg2video:\
> keyint=18:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:aspect=4/3\
>  -mpegopts format=dvd -srate 48000 -af lavcresample=48000 -ofps 30000/1001\
>  -o temp.mpg

-ofps 30000/1001 along with scaling is certainly wrong. If the content
is interlaced, you need to treat it specially or deinterlace it first,
and if it's not interlaced then 30000/1001 is almost surely the wrong
framerate.

BTW why are you rescaling and adding black bars to make it 4:3?! This
will only butcher the quality and make it so that the DVD can't be
played right on 16:9 displays.

> The resulting file is then passed to dvdauthor to create the disk structure.  
> Is this more likely an MEncoder problem or should I be looking at dvdauthor?  
> It's not a major issue, but it would be nice to get accurate times for the 
> resulting discs.  Thanks.

No idea what you mean by the time being wrong.

Rich