#0  0x00007f53df01d73a in FcConfigFilename () from /usr/lib/libfontconfig.so.1
No symbol table info available.
#1  0x00007f53df0313a7 in FcConfigParseAndLoad ()
   from /usr/lib/libfontconfig.so.1
No symbol table info available.
#2  0x00007f53b9377461 in ?? () from /usr/lib/libass.so.3
No symbol table info available.
#3  0x00007f53b9379b46 in ass_set_fonts () from /usr/lib/libass.so.3
No symbol table info available.
#4  0x00007f53b9588a7a in ?? () from /usr/lib/vlc/codec/liblibass_plugin.so
No symbol table info available.
#5  0x00007f53e8cbddb3 in __module_need () from /usr/lib/libvlccore.so.2
No symbol table info available.
#6  0x00007f53e8c79950 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#7  0x00007f53e8c7cdac in input_DecoderNew () from /usr/lib/libvlccore.so.2
No symbol table info available.
#8  0x00007f53e8c8015e in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#9  0x00007f53e8c80305 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#10 0x00007f53e8c80e73 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#11 0x00007f53e8c84161 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#12 0x00007f53e8c8662e in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#13 0x00007f53e8c883e6 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#14 0x00007f53e8c89dae in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#15 0x00007f53e8c8ef31 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#16 0x00007f53e8c911e5 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#17 0x00007f53e8cc40d4 in ?? () from /usr/lib/libvlccore.so.2
No symbol table info available.
#18 0x00007f53e8f17a04 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#19 0x00007f53e920c7bd in clone () from /lib/libc.so.6
No symbol table info available.
#20 0x0000000000000000 in ?? ()
No symbol table info available.