[MPlayer-users] Nobody here who can help with cutting black borders away?
Nico Sabbi
nsabbi at tiscali.it
Tue Apr 27 15:41:17 CEST 2004
Rainer Hantsch wrote:
>Hi, Nico Sabbi!
>
>On Tue, 27 Apr 2004, Nico Sabbi wrote:
>| if no one answered there will be a reason, right?
>
>Very interesting point of view. :-/
>I dont' see it this way, but let me explain below...
>
>| to crop you need to use -vf crop=... read the man page for details;
>| in any case you can't crop without re-encoding, so I suggest to store
>| the original recording as a lossless format, such as ffv1 or huffyuv
>| (again, man mplayer, man ffmpeg, ffmpeg -formats to get the list of
>| codecs)
>
>Thanks for the information. In fact, I shall repeat doing what I did 1 day
>long: Trying to understand a man page which is not really to understand...
>You are joking, right? :)
>
>
>About man-page and documentation:
>---------------------------------
>man-page:
> I only see a long listing of options in the man page, going over 33 pages
> A4 and not very clear to read and/or understand. Also, the man page is a
> total mixture between mplayer and mencoder.
>
most of the code is shared, and what is program specific is specified at
the end.
In my opinion mplayer/mencoder man page is the best one I ever read of
all the
playing/transcoding programs around
>Because this two products use
> only a part of options (each), this is causing a lot of confusion.
> The man page is possibly useful when you _know_ what you want to do and
> you only need a final -very litte- info (syntax) to get it work, but
> this is definitely no _documentation_, it's nothing else than a listing
> of optins with a very brief explanation.
> So the man page is everything, but NOT USEFUL for learning how to use
> mencoder/mplayer.
>
>
>
if you need an encoding guide you can find plenty at www.doom9.org and
www.digitaldigest.com
(among the others);
generally a man page is supposed to explain how to use the program
(after all it's a manual page, not a guide)
and mplayer's one is not an exception
>HTML-Doc:
> In addition, there is a HTML "manual" available in several languages,
> which slightly scratches the surface of some trivial ways of using
> mencoder. This part goes over 3 pages A4 and shows primarily a very
> trivial way of converting a DVD into a divx in 2 pass, and how to
> (theoretically) repair a damaged avi and how to paste two AVI-files
> (and which actually does not really work).
> Because of the extreme number of options I am sure that 30 pages will
> not be sufficient for mencoder!
> I would possibly reduce to one language (english) and invest more time
> into completing and updating this manual to make it a real USER GUIDE,
> which also shows with many examples how to use mplayer/mencoder for
> multiple purposes.
>
>
it would be a good initiative
>Conclusion:
>So I must currently say, that there is currently nothing available which is
>worth to be named DOCUMENTATION or USER GUIDE and will be really helping a
>newcomer to LEARN using mencoder.
>
as I wrote above you seem to want a general encoding guide, with
specific hooks to mplayer
>And exactly this leads into my situation
>(and I am sure that I am not the only one!) that I can choose between doing a
>stupid "trial and error" (calculate by yourself how many possible combinations
>until - hopefully soon - an acceptable result is found), or asking in the
>mplayer newsgroup.
>
>
>
>
believe it or not but experimenting yourself teaches more than a
pre-made recipe
>mfg
>
> Ing. Rainer Hantsch
>
>
>_______________________________________________
>
>
>
btw, what you need is something like this, which you have to adapt to
your needs:
mencoder -ovc lavc -lavcopts vcodec=ffv1 -oac pcm -o orig.avi tv://
(followed by the tv options)
then
mencoder -ovc lavc -lavcopts
vpass=1:vcodec=mpeg4:vbitrate=1000:mbd=2:autoaspect -oac mp3lame
-lameopts cbr:br=128
-vf crop=<coordinates> -o film.avi orig.avi
mencoder -ovc lavc -lavcopts
vpass=2:vcodec=mpeg4:vbitrate=1000:mbd=2:autoaspect -oac mp3lame
-lameopts cbr:br=128
-vf crop=<coordinates> -o film.avi orig.avi
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