Can't compile on Linux Mint 13

[pollito001]

Im getting Error at 94% :

Quote:Linking CXX executable PPSSPPHeadless
lib/libCore.a(MediaEngine.cpp.o): In function `MediaEngine::stepVideo(int)':
MediaEngine.cpp.text+0xf5f): undefined reference to `av_frame_get_pkt_duration'
collect2: ld returned 1 exit status
make[2]: *** [PPSSPPHeadless] Error 1
make[1]: *** [CMakeFiles/PPSSPPHeadless.dir/all] Error 2
make: *** [all] Error 2
pollito@pollito ~/Desktop/PSP/ppsspp/build $