DIAGTR 178 libavfilter/vf_xfade.c { "diagtr", "diag tr transition", 0, AV_OPT_TYPE_CONST, {.i64=DIAGTR}, 0, 0, FLAGS, "transition" }, DIAGTR 1421 libavfilter/vf_xfade.c case DIAGTR: s->transitionf = s->depth <= 8 ? diagtr8_transition : diagtr16_transition; break;