[MEncoder-users] Cropping fails on DVD

[Jon Cosby]

On Sun, Sep 6, 2009 at 9:41 AM, Grozdan <microchip at telenet.be> wrote:

> 2009/9/6 Jon Cosby <jon.l.cosby at gmail.com>:
> > I'm backing up some DVDs. I'm using a different program to rip them. I
> did a
> > test run on one chapter and got great results, although I got wide screen
> > when I intended to get full screen. I then did the entire title,
> >
> > Pass 1:
> > mencoder *.vob -vf crop=704:352:8:62,scale=640:480 -ovc xvid -xvidencopts
> > bvhq=1:chroma_opt:quant_type=mpeg:bitrate=658:pass=1:threads=2 -oac copy
> -o
> > /dev/null
> >
> > Pass 2:
> > mencoder *.vob -vf crop=704:352:8:62,scale=640:480 -ovc xvid -xvidencopts
> > bvhq=1:chroma_opt:quant_type=mpeg:bitrate=658:pass=2:threads=2 -alang en
> > -oac mp3lame -lameopts br=96:cbr:vol=6 -o chinatown.avi
> >
> > This time, the cropping failed. Frustrating, as it took a few hours to
> > finish the transcoding. Does it usually take this long to transcode a
> DVD,
> > and why would the cropping fail on the full run? It even failed on the
> test
> > chapter the second time around.
>
> what do you mean by "crop failed"? I've never had crop fail on me in
> all those years I've been encoding DVDs. You can find out the correct
> crop areas by using -vf cropdetect then pass the values to the crop
> filter
>


I did that, that's how I got the values for the '-vf crop' option. I still
have black borders in spite of this. This didn't happen on the test run.


Jon



>
> Yes, it takes a long time to encode a DVD using high encoder settings.
>