[olug] Creating clips from DVD

[Lane Roberts]

Thanks for writing matt - I ended up just using a computer that was
there and seeking to the time stamp - which was a lot better than the
people presenting before me.  I'll have to play around with this over
the summer though - so I know how to do it next time.
Thanks again
Lane

On 5/6/06, Matt Anderson <manderso at cs.wisc.edu> wrote:
> Do you have the video extracted from the DVD(s)?  I imagine a 3 step
> process for what you describe -- extract video, edit video, write
> video to DVD.
>
> The mencoder binary that is bundled with mplayer can (if all codecs,
> copy protection circumvention and whatnot are installed correctly)
> extract clips from a DVD and transcode them into a format of your
> choosing.  I haven't done this in a couple of years, but some notes I
> dug up on the proper incantation:
>
> (excerpted) options:
>    -vop          activate comma separated list of video filters
>    -zoom         allow software scaling, will force with -vop scale
>    -xy           scale width to x, keep aspect ratio (if x > 8)
>    -o            output file
>    -oac          encode with given audio codec (mp3lame)
>    -lameopts     options to use if encoding mp3
>    -ovc          encode with given video codec
>    -lavcopts     options to use if encoding with libavcodec
>    -ss           seek
>    -endpos       stop after some time interval
>    -vop lavdeint deinterlace video with libavcodec
>
>    mencoder -dvd 1 -vop scale -zoom -xy 480 -o /tmp/my_video.avi -oac
> mp3lame -lameopts cbr:preset=192 -ovc lavc -lavcopts
> vcodec=mpeg4:vhq:vbitrate=800:keyint=2 -ss 55:28 -endpos 19
>
> will jump to a point supposedly 55 minutes and 28 seconds into the
> clip, encode the video it finds there mpeg4 with mp3 audio, resized
> (proportionately) to a width of 480, for 19 seconds, and write it out
> to the file /tmp/my_video.avi.  I say supposedly as I recall it
> didn't accurately jump there (as measured by say, the mplayer
> timestamp if you were viewing the dvd) -- finding the desired start
> point fell back (for me) to doing binary search (using mplayer -ss
> TIME to see where it started) and eventually finding the right spot.
> Unnecessarily painstaking and annoying, but it did work.
>
> I've never really tried to edit video with a Linux tool -- I have no
> recommendation on that.  I also haven't tried to create a video DVD
> with a Linux tool, so no recommendations there either.  These days,
> I'd do quick editing jobs with Quicktime Pro on a Mac (which I would
> recommend if you have access to / inclination to use a Mac).  Of
> course, if you have access to a Mac, there's also iDVD which would
> probably make short work of step three as well (though I've still
> never tried to do that).
>
> A good resource for these sorts of activities is http://
> www.videohelp.com/ -- you might find guides there that you find to be
> useful.
>
> Good luck...
>
> --
>   Matt Anderson
>
>
> On May 6, 2006, at 6:36 PM, Lane Roberts wrote:
>
> > Here's the objective:
> >  I'm trying to get a compilation of about 5 minutes of clips from a
> > dvd spliced together onto a dvd that will pause between each clip(its
> > for a presentation).
> >
> > I've never really done anything with video before, so this is a
> > learning experience, but does anyone have any pointers or (better yet)
> > a direct guide?
> > Google has been somewhat helpful, but everything I've found so far is
> > about going directly to AVI, and I don't need to do that.
> > Thanks
> > Lane
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