[MPlayer-users] crappy MPNG´s

[Kiko Uehara]

Hi Christoph,

 Which version of mplayer are you using? and What video codec would you
like to use for encoding ? 
I don't use mencoder much lately but try simply like this:

 'mencoder mf://\*.png -o Filename.avi -ovc lavc -lavcopts
vcodec=mpeg4:vhq:vbitrate=1800 fps=25'

Also, i'd suggest using TGA instead of PNG(or look for the list archive
to find PNG patch). and definitely render in 24bit depth.

-kiko
PS: raytracing is not related to specular highlight of the sphere. =)




On Mon, 13 Oct 2003 21:02:57 +0200
Schaman Christoph <a9907506 at unet.univie.ac.at> wrote:

> [Automatic answer: RTFM (read DOCS, FAQ), also read
> DOCS/bugreports.html] Hello again, everybody,
> 
> I am, after successfully compiling MPlayer & -Encoder, a bit
> disappointed by the quality of the movies I get as a result.
> 
> First, I´m trying to translate a camera through a kind of a tubule,
> which has it´s end in the focus of the picture. But in the movie that
> focus is lost, and, although the focus of the movement still is the
> center of the tube´s end, the new center of the picture is somewhat
> shifted to the left, as if I were only seeing the left (a bit more
> than half) part of the picture. The .png´s were created with a size of
> 800:600 pixels, and I´m encoding with mencoder -mf
> on:w=800:h=600:fps=25:type=png -vop pp=dr/fd/lb -ovc copy -o
> Filename.avi \*.png so it should get me a Movie of the size 800:600,
> with the frames remaining unchanged, right?
> But it doesn´t.
> 
> Second, there are two things: while Anti-aliasing seems to work pretty
> well inside povray, there is no effect of it to the final movies; even
> if the .png´s looked really nice before, after running through the
> encoding process, they look like that M.C. Escher stairway picture. Is
> there any filter, or other method in mencoder that could keep the
> Antialiasing intact (although I doubt mencoder could reverse
> Antialiasing - another effect maybe?!)? And there is another problem,
> as I did raytrace the images, i have some spheres in the pictures
> which reflect light; while "shining brightly" in the png´s, after
> encoding they turn into some kind of rings, looking like interference
> rings. Is there a way to keep those spheres (which are vital to the
> pictures/movie) as "shining" as they were in the .png´s?
> 
> And third, concerning colors: I made the .png´s with a color depth of 
> rgb16bit, but mencoder, if not told to use option -vop rgb2bgr,
> produces movies in false colors. If I reverse it with the above
> mentioned option, the colors are about the same as they were, but the
> result is not very pretty (crappy colors, etc.).
> 
> I´d greatly appreciate any kind of support or help to any of the
> questions mentioned above, and please be patient again, as I´m still
> new to this list (so, if you need any additional information, or if I
> didn´t explain myself properly because of my crappy english, please
> tell me). Of course any link to a tutorial would be fine, too, as I
> didn´t find any through my oracle (google).
> 
> GREETINGS from Vienna
> 
> Christoph
> 
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