DIRECTION_OUT      93 libavdevice/decklink_common.h int ff_decklink_set_format(AVFormatContext *avctx, int width, int height, int tb_num, int tb_den, decklink_direction_t direction = DIRECTION_OUT, int num = 0);
DIRECTION_OUT      96 libavdevice/decklink_common.h int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction = DIRECTION_OUT);