https://trac.macports.org/ticket/55164
--- modules/codec/avcodec/vda.c	2017-10-25 16:52:10.000000000 +0200
+++ modules/codec/avcodec/vda.c	2017-10-25 16:52:10.000000000 +0200
@@ -145,7 +145,7 @@
 
     external->sys = p_va;
     external->description = "VDA";
-    external->pix_fmt = PIX_FMT_VDA_VLD;
+    external->pix_fmt = AV_PIX_FMT_VDA_VLD;
     external->setup = Setup;
     external->get = Get;
     external->release = Release;