Re: [MPlayer-users] Encoding "dark" movies

[Stephan André Schmidt <stephanandre.schmidt@xxxxxxxxxxxxxxxx>]

Am 2002.12.08 04:24 schrieb(en) D Richard Felker III:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> On Sat, Dec 07, 2002 at 11:31:40AM +0100, Stephan André Schmidt wrote:
> > [Automatic answer: RTFM (read DOCS, FAQ), also read
> DOCS/bugreports.html]
> > Hello,
> >
> > when encoding "dark" movies like "Panic Room" or "From Hell", the
> assumed
> > bitrate to end up in a divx about 1400 MB, i.e. about 1390 for "From
> > Hell", does end in an avi of around only 900 MB (3-pass encoding).
> Giving
> > the bitrate of about 1200 to mencoder does not make any difference to
> the
> > file size of the avi; it is also around 900 MB. Are there any special
> > filters or options to libavcodec handling this kind of "dark" movies,
> so
> > that the "calculated" avi size will be reached after encoding?
> >
> > The command line for mencoder has been:
> >
> > (have encoded the audio first), then -->
> >
> > nice -+19 mencoder -dvd 1 -dvd-device $DVD_DEV -oac copy -o /dev/null
> -ovc
> > lavc -lavcopts vcodec=mpeg4:vbitrate=1386:vhq:vpass=1:vqmin=2:vqmax=31
> > -vop scale=640:352,crop=720:434:0:74
> >
> > wait
> >
> > nice -+19 mencoder -dvd 1 -dvd-device $DVD_DEV -oac copy -o
> from_hell.avi
> > -ovc lavc -lavcopts
> > vcodec=mpeg4:vbitrate=1386:vhq:vpass=2:vqmin=2:vqmax=31 -vop
> > scale=640:352,crop=720:434:0:74
> >
> > Thanks for hints,
>
> Hmm, isn't the whole idea of a two-cd dvd rip that you want to keep
> the video bitrate reasonable and use -oac copy to get 5.1 ac3 audio??
> Using insanely high bitrates like 1200+ will not generally improve
> quality (unless you're using a crappy encoder like divx3/4, or HUGE
> resolution).
>
> Rich
 Hello,

oh, I do not know if it is the "whole" idea of two-cd dvd-ripping is 
"only" to keep the ac3 audio from the dvd. I would say that it depends on 
the movie's length. If it has got a playtime of around 2 hours, in my 
experience a 700 MB or 800 MB CD is not that ideal to make a "quality" 
divx. What I want to do is to make DVD (backup) copies which are almost as 
brilliant as the DVD videos are. For this, a bitrate of 1200 should be 
enough, a bitrate of around 800 won't. And, taking two (or more) audio 
streams from the movie, encoding them to quality (4) ogg vorbis and then 
putting it together to an ogm, one could easily reach a targetted size of 
around 1400 MB.
Saying some words to encoding "dark" movies, I have taken two ac3 streams 
from "From Hell" and have put it to the divx, so, at the end, I have 
reached a size of about 1350 MB ;-)

Bye,

Stephan