Record frome dvb stream

Hello,

I installed mplayer 1.0pre2 with enable-dvb
but dont understand what

Checking for DVB ... no (specify path to DVB/ost/include with 
--with-dvbincdir=DIR)
Checking for DVB HEAD ... no (specify path to DVB/include (HEAD Version) 
with --with-dvbincdir=DIR)

are for ?

anyway mpalyer dvb:// doesn't work but mplayer --dvb /dev/.../dvr0 does.
I ahve the channels.conf in ~/.mplayer.
Why ?

I tried to mencode the stream from /dev/dvb/adaptator0/dvr0
with
mencode -o file.mpg -of mpeg -ovc copy -oac copy --dvb /dev/.../dvr0
it works but I have no sound.
Why ?

without -of mpeg, sound is here but mplayer krash after 2 seconds.
Why ?

I tryed to encode during 10 sec, with frames 250, it doesn't work. 
mencode doesn't stop after 10 sec.
Why ?

Basicaly, I want to copy video stream from dvb with the best quality 
(mpeg2), and to encode it in a second time, 3 pass dvd methode.

How should I do ?

How to select a specific language and specific subtitles in a 
multi-language and multi-subtitle stream (canal+ or canal satellite for 
example) ?

I tryed the doc tv and dvb specific sections but I don't find, or don't 
understand the way to do that. If it's written somme where, please tell 
me, otherwise could someone help me ?

Thanks a lot.

Nicolas.

PS :

cvs DVB driver
kernel 2.4.22
nexus-s dvb card


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