FF_OUTLINK_IDX    329 libavfilter/internal.h #define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))
FF_OUTLINK_IDX     32 libavfilter/qsvvpp.h #define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))