mlt-legacy: use ffmpeg4

multimedia/mlt-legacy/Portfile

@@ -6,10 +6,11 @@ PortGroup           conflicts_build 1.0
 PortGroup           github 1.0
 PortGroup           muniversal 1.0
 PortGroup           qt4 1.0
+PortGroup           ffmpeg 1.0
 
 name                mlt-legacy
 github.setup        mltframework mlt 6.26.1 v
-revision            1
+revision            2
 categories          multimedia
 maintainers         nomaintainer
 license             GPL-2+
@@ -47,13 +48,14 @@ configure.cxxflags-append  -std=c++14
 # fatal error: 'stdatomic.h' file not found
 compiler.blacklist-append  {clang < 700}
 
+ffmpeg.version      4
+
 depends_build-append \
                     path:bin/doxygen:doxygen \
                     port:git
 
 depends_lib-append  port:atk \
                     path:share/pkgconfig/eigen3.pc:eigen3 \
-                    path:lib/libavcodec.dylib:ffmpeg \
                     port:fftw-3 \
                     port:frei0r-plugins \
                     port:libebur128 \
@@ -98,9 +100,6 @@ platform darwin 10 {
     }
 }
 
-configure.cflags-append     "-I${prefix}/include"
-configure.ldflags-delete    "-L${prefix}/lib"
-
 # make sure the build system actually sees our settings by amending the toplevel config.mak.
 post-configure {
     set config.mak [open ${worksrcpath}/config.mak "a"]
@@ -118,12 +117,12 @@ if {${universal_possible} && [variant_isset universal]} {
     foreach arch ${configure.universal_archs} {
         lappend merger_build_env(${arch})   "CFLAGS=${configure.cflags} -arch ${arch}"
         lappend merger_build_env(${arch})   "CXXFLAGS=${configure.cxxflags} -arch ${arch}"
-        lappend merger_build_env(${arch})   "LDFLAGS=${configure.ldflags} -L${worksrcpath}-${arch}/src/framework -L${prefix}/lib -arch ${arch}"
+        lappend merger_build_env(${arch})   "LDFLAGS=${configure.ldflags} -L${worksrcpath}-${arch}/src/framework -arch ${arch}"
     }
 } else {
     build.env-append                        "CFLAGS=${configure.cflags} [get_canonical_archflags cc]"
     build.env-append                        "CXXFLAGS=${configure.cxxflags} [get_canonical_archflags cxx]"
-    build.env-append                        "LDFLAGS=${configure.ldflags} -L${worksrcpath}/src/framework -L${prefix}/lib [get_canonical_archflags ld]"
+    build.env-append                        "LDFLAGS=${configure.ldflags} -L${worksrcpath}/src/framework [get_canonical_archflags ld]"
 }
 
 variant gtk2 description {include the gtk2 module (for additional image and text producers)} {