[MEncoder-users] Cropping fails on DVD

[Another Sillyname]

Sorry to ask the obvious.......

Is it possible the picture frame changes sizes from the beginning of
the DVD and when the film starts?

I've noticed sometimes cropdetect 'locks' on the first size and never
then recalculates the resize.

Can I suggest run the cropdetect again with a -ss 30:00.00 in there
(about 30 minutes into DVD) and see if you get the same numbers.

Good Luck

2009/9/6 Jon Cosby <jon.l.cosby at gmail.com>:
> 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.
>>
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