#0  0xb730c1e4 in avcodec_open () from /usr/lib/libavcodec.so.1d
#1  0x00040000 in ?? ()
#2  0xb7f2cc50 in ?? () from /lib/ld-linux.so.2
#3  0x0806ad21 in ?? ()
#4  0x08478960 in ?? ()
#5  0x00000000 in ?? ()