[MPlayer-users] mencoder adding a border to a movie
D Richard Felker III
dalias at aerifal.cx
Thu Apr 15 17:12:44 CEST 2004
On Thu, Apr 15, 2004 at 03:58:41PM +0100, S. Pearse wrote:
> I'm a bit of a newbie, but I thought that mpeg worked by only describing
> the changes between the frames. Therefore if an area is the same colour
> on every frame (black), then it would in effect not contribute to the the
> data being described on each frame.
> Is this wrong?
NEVER NEVER NEVER!!!!!!!!!!!!!!!!!!!!!!!! REPLY OFF-LIST! IT'S
TWO: NEVER NEVER!!!!!! TOP-POST!!!
Three: Your understanding is way too simplistic. Either read the
archives and learn some mathematics to understand why the borders will
reduce quality, or just accept it as fact and move along.
Sorry for the flames but I've seen lots of people doing this lately,
and it's really a pain. I have enough personal email without mplayer
mail filling my personal mailbox too.
> On Thu, 15 Apr 2004, D Richard Felker III wrote:
> > On Thu, Apr 15, 2004 at 11:17:38AM +0100, scott at bonnag.com wrote:
> > > Hi,
> > >
> > > I want to encode and scale 16:9 films from dvd to 4:3 but preserve the aspect
> > > ratio. I want the films to appear widescreen but add a black border to and
> > > bottom.
> > >
> > > I have found this on the man page:
> > > mencoder dvd://2 -vf scale -zoom -xy 512
> > >
> > > which almost does it, but I want to add black to the top and bottom to make it
> > > 4:3.
> > >
> > > Any suggestions?
> > Yes, don't do it. It's totally useless. Maybe if you were making VCD's
> > where it's required, this would be ok, but 512 is not VCD-size. All
> > you will do by adding black borders is significantly lower the
> > quality!
> > Rich
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