[MPlayer-users] problem with deinterlacing and...

[andrea gelmini]

hi all,
	thanks to all coders for mplayer and to anyone writing in this
	mailing list (there are a lot of useful post).
	i've got a problem (i don't fill the bugreport because i have to
	understand if this is a bug...).
	anyway, i'm using the latest cvs of mplayer (for me now is
	cogno:~> date -u -R
	Fri,  3 May 2002 10:38:16 +0000)
	
	with latest divx 5.01 (i mean DivX501 Build20020416).
	
	debian distribution (sid), and latest gcc:
	cogno:~> gcc-3.0 -v
	Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.4/specs
	Configured with: ../src/configure -v
	--enable-languages=c,c++,java,f77,proto,objc --prefix=/usr
	--infodir=/share/info --mandir=/share/man --enable-shared
	--with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long
	--enable-nls --without-included-gettext --disable-checking
	--enable-threads=posix --enable-java-gc=boehm
	--with-cpp-install-dir=bin --enable-objc-gc i386-linux
	Thread model: posix
	gcc version 3.0.4

	so, i dump a dvd to a file:
	mplayer -dvd 1 -dumpstream -dumpfile incrediblepornmovie.vob
	mv incrediblepornmovie.vob g.vob
	
	extract audio:
	mencoder g.vob -mc 0 -oac mp3lame -lameopts vbr:q=2 -ovc frameno -o frameno.avi

	everything's fine, but i want reduce channels (stereo to mono) and
	bitrate (i don't need sorround in a porn fil...m). i read in
	mencoder under "-lameopts":

	                  mode=XXX
				0=stereo
                                1=joint-stereo
                                2=dualchannel
                                3=mono
                                (default: auto)

	but if i do this:
	mencoder g.vob -mc 0 -oac mp3lame -lameopts vbr:q=2:mode=3 -ovc frameno -o frameno.avi
	nothing change.

	questione: where's my mistake?
	
	now the video. i need deinterlace it but, in mencoder.1 i read under -divx4opts
	
	deinterlace    enable deinterlacing
	                               (don't use, DivX4 is buggy!)
				       
	question: divx 5.01 has same problem?
	
	so, with this doubt i use -vop. i read in documentation.html:

	   2.6.8. Postprocess
	   Description:
	   This is our good old postprocess, juts converted to the filter
	   layer. Performs image quality enhancement, deinterlacing, etc,
	   see -npp help for available options.
	   Usage:
	   -vop pp[=postprocess options/keywords]
	
	then in mplayer.1 i find:

	   -pp 0x20000 <=> -npp lb (deinterlacing - for DVD/MPEG2 playback e.g.)
	
	good, but if i do:

	mencoder g.vob -ss 00:15:40 -vop pp=lb -mc 0 -divx4opts br=2000 -o 1.avi -pass 1

	there's no interlace, but if i do:

	mencoder g.vob -ss 00:15:40 -vop pp=0x20000 -mc 0 -divx4opts br=2000 -o 1.avi -pass 1
                                         ^^^^^^^^^^
	it works. i tried npp too, but nothing changed.

	question: is it a bug? i missed something?

thanks again,
andrea