net/opal: Move to FFmpeg 4

Fails to build with FFmpeg 6

PR:		270325
Approved by:	portmgr (blanket, build fix)
Sponsored by:	Blinkinblox

net/opal/Makefile

@@ -16,9 +16,9 @@ USES=		compiler:c11 gmake pathfix pkgconfig tar:xz
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 
-CXXFLAGS+=	-I${LOCALBASE}/include
-CPPFLAGS+=	-I${LOCALBASE}/include
-LDFLAGS+=	-L${LOCALBASE}/lib
+CXXFLAGS+=	-I${LOCALBASE}/ffmpeg4/include -I${LOCALBASE}/include
+CPPFLAGS+=	-I${LOCALBASE}/ffmpeg4/include -I${LOCALBASE}/include
+LDFLAGS+=	-L${LOCALBASE}/ffmpeg4/lib -L${LOCALBASE}/lib
 
 OPTIONS_DEFINE=	JAVA ILBC GSM SPEEX THEORA FFMPEG X264 SIP H323 IAX \
 		H224 H281 FAX MSRP SIPIM RTPTEXT H450 H460 H501 LID UVIDEO \
@@ -131,9 +131,10 @@ PLIST_SUB+=	X264="@comment "
 .endif
 
 .if ${PORT_OPTIONS:MFFMPEG}
-BUILD_DEPENDS+=		ffmpeg>=2:multimedia/ffmpeg
-RUN_DEPENDS+=		ffmpeg>=2:multimedia/ffmpeg
+LIB_DEPENDS+=		libavutil.so.56:multimedia/ffmpeg4
+CONFIGURE_ENV+=	PKG_CONFIG_PATH="${LOCALBASE}/ffmpeg4/libdata/pkgconfig"
 CONFIGURE_ARGS+=	--enable-libavcodec
+MAKE_ENV+=	PKG_CONFIG_PATH="${LOCALBASE}/ffmpeg4/libdata/pkgconfig"
 PLIST_SUB+=	FFMPEG=""
 WITH_VIDEO=	yes
 .else