[MPlayer-users] 2 -> 5+1

[raptor]

hi this is my first post in the list,

I'm tring to play 2ch videos  to 6ch.. i.e movies detected like this :

Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
MP3lib: init layer2&3 finished, tables done
AUDIO: 48000 Hz, 2 ch, 16 bit (0x10), ratio: 16000->192000 (128,0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)

what I came up is :

mplayer -af sub -channels 6 movie.avi

which plays 4+1, on the center i dont get any sound. I also tied using pan= w/o success.
example :

mplayer -channels 6 pan=6:1:0:0:0:0:0:0:1:0:0:0:0:0:0:1:0:0:0:0:0:0:1:0:0:0.5:0.5:0:1:0

which didnt work, but changing 0.5 to 1, showed some sound on the center..

mplayer -channels 6 pan=6:1:0:0:0:0:0:0:1:0:0:0:0:0:0:1:0:0:0:0:0:0:1:0:0:1:1:0:1:0

but then when using -af sub, didnt worked...i.e. it become 4+1 minus subwoofer(LFE)

Is there a way to make this work..
I use alsa 1.0.0_rc2.(realtek ALC655 sound card)

One other thing I want to build an index of my sound+movies...so I want to process them
one by one and extract the info that mplayer shows when plays..
Can I run mplayer in a way that it only shows this info w/o really playing anything..
And more importantly from the example above which is the the true info about the format.
is it this on the  "Selected audio codec"-line i.e. "(mp3lib MPEG layer-2, layer-3)"

i should see the all possible values from the DOCS isn't it, i mean their names so that
I can show some short desc like : mp3, ac3, !!!

The same questions apply for VIDEO ?
How I can distinguish between the stereo (2ch) movies that contain Surround encoded into the 
tracks and thouse that are pure 2ch (i.e. no surround)..

tia