[MEncoder-users] growth bar on linux

[Philippe MONROUX]

I all,

First of all I apologize for my poor English... 

I'm using mencoder in a shell script (linux) and I want to make a
growth bar which indicate progress status of encoding with bash and
dialog. 

--gauge seems to be suitable for that but it needs integer which
indicate the growth level of encoding.

Of course there is mencoder statusline :
Pos: 168.1s   4640f (90%) 35fps Trem:   1min  56mb  A-V:-0.018 [2378:192]

but I don't know how to retrieve the Pos: number every minute by
example.

Any clue ? Thanks in advance

-- 
philippe