[MPlayer-users] Re: MPlayer-users Digest, Vol 4, Issue 54

[justin case]

hi there,

your problem is most likely a saturated codec.
you should try what happens when you use a fixed quanitzer of 2.
a fixed quant of 2 is what you get when the codec is saturated, meaning, it
is not able to compress "lighter" and has reached its maximum quality.
actually a good thing.
you could benefit from this and start using a higher resolution, use less
noise-filtering (if you use such at all..), raise your audio-bitrate and so
on..

in you initial post though, you stated that the quality was very poor.
investigate what causes that.
in my experience lavc has big trouble with noisy sources, where xvid is able
to keep the noise intact, using higher bitrates. xvid seems to be more
capable of "detecting" the noise as fine detail, where lavc seems to simply
ignore it as it possibly can't deal with such fine structures.

good luck
/jc


> Hi there.
> I'm having the same problem with some source, DVD, VOB files, and I was
> given at last a good explanation, that is that libavcodec does
> not use more
> bits that it needs, most of the time I cannot encode a video in two 2CD,
> cause at the end, it uses the bitrate it wants, I'm using xvid
> that seems to
> do what I want, if I say a bitrate of 1800 it uses 1800 and not 900.
>
> Bye.
>
>
>
> ----- Original Message -----
> From: "amber" <newsgrabber at poczta.onet.pl>
> To: "MPlayer usage questions, features, bugreports"
> <mplayer-users at mplayerhq.hu>
> Sent: Tuesday, April 13, 2004 7:53 AM
> Subject: Re: [MPlayer-users] Re: MPlayer-users Digest, Vol 4, Issue 54
>
>
> > > Please send capture command.
> >
> > mencoder -tv
> on:driver=v4l:input=0:width=768:height=576:audiorate=96000 -o
> > capture.avi -oac mp3lame -lameopts vol=7:vbr=0:br=96:mode=2 -srate 44100
> > -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=950 -vop pp=tn/lb -endpos 5220
> >
> >
> > the movie is very still, so the low bitrate could be explained. but i
> think  something
> > is wrong if the program does not use the entire CD, making only 400 MB.
> >
> > i tried to play with vqscale set to 2 or 1.
> >
> > vqscale=2 makes 400 MB with bitrate about 250
> > vqscale=1 makes 800 MB with bitrate about 1500
> >
> >
> >
> >
> > _______________________________________________
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> > MPlayer-users at mplayerhq.hu
> > http://mplayerhq.hu/mailman/listinfo/mplayer-users
>
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