Re: [MPlayer-users] reducing size of files while conserving theaudio/video quality

[LGW <large@xxxxxxxxxxxxxx>]

[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
Maximo Ramos wrote:

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Time to reply!
>
> Citando a  D Richard Felker III (dalias@xxxxxxxxxx):
>  
>
> > Getting a CDR drive would be a much better choice. Reencoding will
> > damage quality quite a bit -- you'll have to make the movie look
> > significantly worse to get any significant reduction in size.
> >    
>
> I already have a CDR :) but I want to stop this burning madness!!
> And some files are way too huge, with mounstrous resolutions!!
>
> Do you agree that a 20 minutes show like SouthPark takes 250MB in 352x240
> MPEG format? 
see below :)

>  
>
> > > I choosed vbitrate 800 because according with the man page that's the minimum, 
> > >      
> > No, it says it's the default. 800 is actually much higher than you'll
> > normally use in practice!!
> >    
>
> oops! yes, my bad! but after doing some tests with very high quality mpeg
> files (recorded somewhere from a HDTV signal), if I choose something lower
> than 1800 I get too much pixelation.
Yes, that's why such files should be resized to smaller resolutions. 
Anyway, you will always loose much quality when you re-encode something.

I do it to save space, too. First, there are this bloody 
MPEG1-VCD-Releases. OK, they are great for some shows that are worth one 
CDR per episode, but sometimes it's just madness. The same file, with a 
video quality loss not really noticable on a 71cm TV set can be sized 
down to 350MB (two episodes/CDR) or smaller (then, with quality loss, of 
course). Than, files that are likely watched again, but not for the 
great images, but for the story experiences (like JDoramas - you won't 
need GTO in high quality...). Of course, packing 4 GTO episodes (50 
minutes each) on one CDR with a bitrate slightly below 400 and a 
resolution of 320*240, leads to the dark side of video quality. Smaller, 
the dark side is. But ugly... :)

I'd not advice to reduce the audio quality much. I think a bad audio 
signal is much worse than a bad video signal. Anything less than 
mp3/96kbit is really not nice... or use ogg :)

Just gamble with parameters, but you won't be able to get much better 
results than those you see now...

good luck :)
 Lars

>  
>
> > Rich
> >
> > _______________________________________________
> > RTFM!!!  http://www.MPlayerHQ.hu/DOCS
> > Search:  http://www.MPlayerHQ.hu/cgi-bin/htsearch
> > http://mplayerhq.hu/mailman/listinfo/mplayer-users
> >    
>
>  


_______________________________________________
RTFM!!!  http://www.MPlayerHQ.hu/DOCS
Search:  http://www.MPlayerHQ.hu/cgi-bin/htsearch
http://mplayerhq.hu/mailman/listinfo/mplayer-users