#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 51, 48, 0 )
# error You must update libavcodec to a version >= 51.48.0
#elif LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 25, 0 )
# warning You should update libavcodec to get subtitle support
#endif
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 51, 48, 0 )
# error You must update libavcodec to a version >= 51.48.0
#elif LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 25, 0 )
# warning You should update libavcodec to get subtitle support
#endif