[MPlayer-users] duplicate keyframe with libavcodec in mplayer

[bond]

hi

i run the following cmdl on various xvid .avi files encoded with various
xvid versions and settings:

mplayer -vo null -lavdopts debug=1 XviD.avi

and the output always tells me that there are two identical keyframes at the
beginning of the stream
obviously there is only one keyframe (as some other tools tell me)

is this a known bug?