[MPlayer-users] Error compiling current svn version

[xeonitlinux]

Hallo, i have some problems compiling the current svn version. 
This is the error:

ffmpeg/libavcodec/libavcodec.a(ac3enc_fixed.o): In function `ac3_encode_init':
ac3enc_fixed.c:(.text.unlikely+0x10a7): undefined reference to `ff_ac3dsp_init'
ffmpeg/libavcodec/libavcodec.a(ac3enc_float.o): In function `ac3_encode_init':
ac3enc_float.c:(.text.unlikely+0xe97): undefined reference to `ff_ac3dsp_init'
collect2: ld returned 1 exit status
make: *** [mplayer] Fehler 1

Mi system is a 64 bit Debian Squeeze. Compiling of 1.0rc4 no problem. 
Thank you for your help.