AV_FIELD_BT      1219 extra_lib/include/ffmpeg_android/libavcodec/avcodec.h     AV_FIELD_BT,          //< Bottom coded first, top displayed first
AV_FIELD_BT      1186 extra_lib/include/libavcodec/avcodec.h     AV_FIELD_BT,          //< Bottom coded first, top displayed first