diff --git a/multimedia/mythtv/Makefile b/multimedia/mythtv/Makefile
index feca3791c853..d7c75b25ec90 100644
--- a/multimedia/mythtv/Makefile
+++ b/multimedia/mythtv/Makefile
@@ -13,7 +13,7 @@ COMMENT?=	Homebrew PVR project
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-ONLY_FOR_ARCHS=	amd64 i386
+ONLY_FOR_ARCHS=	amd64 i386 powerpc64
 .if ${/usr/bin/ld:L:tA} == /usr/bin/ld.lld
 BROKEN_i386=	ld: error: can't create dynamic relocation R_386_32 against local symbol in readonly segment
 .endif
@@ -37,8 +37,8 @@ LIB_DEPENDS=	liblzo2.so:archivers/lzo2 \
 BUILD_DEPENDS=	yasm:devel/yasm \
 		${LOCALBASE}/include/linux/input.h:devel/evdev-proto
 
-USES=		gmake gl iconv libtool pkgconfig pathfix qmake:no_env qt:5 ssl \
-		xorg
+USES=		compiler:c++11-lang gmake gl iconv libtool pkgconfig pathfix \
+		qmake:no_env qt:5 ssl xorg
 USE_GITHUB=	yes
 GH_ACCOUNT=	MythTV
 USE_GL=		gl
diff --git a/multimedia/mythtv/files/patch-external_FFmpeg_libswscale_ppc_swscale__altivec.c b/multimedia/mythtv/files/patch-external_FFmpeg_libswscale_ppc_swscale__altivec.c
new file mode 100644
index 000000000000..d372e84d85b1
--- /dev/null
+++ b/multimedia/mythtv/files/patch-external_FFmpeg_libswscale_ppc_swscale__altivec.c
@@ -0,0 +1,55 @@
+--- external/FFmpeg/libswscale/ppc/swscale_altivec.c.orig	2019-08-11 20:06:32 UTC
++++ external/FFmpeg/libswscale/ppc/swscale_altivec.c
+@@ -153,13 +153,13 @@ static void yuv2plane1_float_altivec(const int32_t *sr
+     const int add = (1 << (shift - 1));
+     const int clip = (1 << 16) - 1;
+     const float fmult = 1.0f / 65535.0f;
+-    const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
+-    const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift);
+-    const vector uint32_t vlargest = (vector uint32_t) {clip, clip, clip, clip};
+-    const vector float vmul = (vector float) {fmult, fmult, fmult, fmult};
+-    const vector float vzero = (vector float) {0, 0, 0, 0};
+-    vector uint32_t v;
+-    vector float vd;
++    const vec_u32 vadd = (vec_u32) {add, add, add, add};
++    const vec_u32 vshift = (vec_u32) vec_splat_u32(shift);
++    const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip};
++    const vec_f vmul = (vec_f) {fmult, fmult, fmult, fmult};
++    const vec_f vzero = (vec_f) {0, 0, 0, 0};
++    vec_u32 v;
++    vec_f vd;
+     int i;
+ 
+     yuv2plane1_float_u(src, dest, dst_u, 0);
+@@ -186,14 +186,14 @@ static void yuv2plane1_float_bswap_altivec(const int32
+     const int add = (1 << (shift - 1));
+     const int clip = (1 << 16) - 1;
+     const float fmult = 1.0f / 65535.0f;
+-    const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
+-    const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift);
+-    const vector uint32_t vlargest = (vector uint32_t) {clip, clip, clip, clip};
++    const vec_u32 vadd = (vec_u32) {add, add, add, add};
++    const vec_u32 vshift = (vec_u32) vec_splat_u32(shift);
++    const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip};
+     const vector float vmul = (vector float) {fmult, fmult, fmult, fmult};
+     const vector float vzero = (vector float) {0, 0, 0, 0};
+-    const vector uint32_t vswapbig = (vector uint32_t) {16, 16, 16, 16};
+-    const vector uint16_t vswapsmall = vec_splat_u16(8);
+-    vector uint32_t v;
++    const vec_u32 vswapbig = (vec_u32) {16, 16, 16, 16};
++    const vec_u16 vswapsmall = vec_splat_u16(8);
++    vec_u32 v;
+     vector float vd;
+     int i;
+ 
+@@ -208,8 +208,8 @@ static void yuv2plane1_float_bswap_altivec(const int32
+         vd = vec_ctf(v, 0);
+         vd = vec_madd(vd, vmul, vzero);
+ 
+-        vd = (vector float) vec_rl((vector uint32_t) vd, vswapbig);
+-        vd = (vector float) vec_rl((vector uint16_t) vd, vswapsmall);
++        vd = (vector float) vec_rl((vec_u32) vd, vswapbig);
++        vd = (vector float) vec_rl((vec_u16) vd, vswapsmall);
+ 
+         vec_st(vd, 0, (float *) &dest[i]);
+     }