[MPlayer-users] flickering artifacts

[D Richard Felker III]

On Mon, Sep 20, 2004 at 09:42:01AM +0200, Alain Barthélemy wrote:
> Le vendredi 17 septembre 2004, 19:01:56 ou environ Ulrich Schweitzer <us- at gmx.de> a écrit:
> > On Friday 17 September 2004 18:16, Wu-Kung Sun wrote:
> > 
> > > nice -n 19 mencoder dvd://1 -aid 128 -oac copy -ovc
> > > lavc -lavcopts
> > > vcodec=mpeg4:v4mv:vhq:vqmin=2:trell:vbitrate=830:vpass=(1||2)
> > > -vf crop=710:480:6:0,scale=640:-2,hqdn3d=2:1:2,harddup
> > > -noodml -o ("/dev/null"||movie.avi)
> > 
> > Your scale option is most likely the problem. You end up with an image 
> > height of 274 which is not divisible by 16. Because of that you get ugly 
> > macro blocks on the edge of the frame. Both width and height should 
> > always be divisible by 16. 
> > 
> > > Some things I don't understand. The image size turned
> > > out to be 480x274 instead of 640xnnn.  
> > 
> > Are you sure the frame size is 480x274? Or does mplayer just rescale it to 
> > that size because of wrong aspect info (I had that problem once)? Try 
> > passing -noaspect to mplayer. If this solves the problem, pass 
> > -force-avi-aspect <aspect> to mencoder.
> > 
> > And one more thing: Encoding directly from DVD can be hard on the drive. 
> > If you have enough space on your hard disc, you should consider ripping 
> > with mplayer dvd://1 -dumpstream and encoding from the resulting file.
> > 
> > Ulrich
> > -- 
> 
> "... hard on the drive ...". Can you explain a little more? It is the DVD drive
> I suppose. Why does it give the "drive" more strain than just reading?

because it reads for 12+ hours instead of 2 hours. imo this is a
non-issue though. just properly set the drive speed down to 1x and you
should be fine.

rich