diff --git a/7c2004b58c26da661618262c9c06b73ad3a9ff6c.diff b/7c2004b58c26da661618262c9c06b73ad3a9ff6c.diff
new file mode 100644
index 0000000..fd653bd
--- /dev/null
+++ b/7c2004b58c26da661618262c9c06b73ad3a9ff6c.diff
@@ -0,0 +1,48 @@
+diff --git a/configure b/configure
+index 51c896e901c5d4bb3ac4408e005380f64fb8f230..78aa11404e414db6168aef920e7e6bdaf5636d7d 100755
+--- a/configure
++++ b/configure
+@@ -1232,15 +1232,16 @@ if [ "$gpac" = "auto" -a "$lsmash" != "yes" ] ; then
+     for lib in -lz -lssl -lcrypto -lpng -ljpeg -ldl -llzma -lgpac -lGL -lGLU -lavdevice -lavfilter -lfaad -lmad -lxvidcore -la52 -lvorbis -ltheora -lopenjpeg; do
+         cc_check "" $lib && GPAC_LIBS="$GPAC_LIBS $lib"
+     done
++    cc_check "" -ldl && GPAC_LIBS="$GPAC_LIBS -ldl"
+     if [ "$SYS" = "WINDOWS" ] ; then
+         cc_check "" -lws2_32 && GPAC_LIBS="$GPAC_LIBS -lws2_32"
+         cc_check "" -lwinmm && GPAC_LIBS="$GPAC_LIBS -lwinmm"
+     fi
+     if cc_check gpac/isomedia.h "$GPAC_LIBS" "gf_isom_close(0);" ; then
+-        if cc_check gpac/isomedia.h "$GPAC_LIBS" "gf_isom_set_pixel_aspect_ratio(0,0,0,0,0);" ; then
++        if cc_check gpac/isomedia.h "$GPAC_LIBS" "gf_isom_set_pixel_aspect_ratio(0,0,0,0,0,0);" ; then
+             gpac="yes"
+         else
+-            echo "Warning: gpac is too old, update to 2007-06-21 UTC or later"
++            echo "Warning: gpac is too old, update to v0.8.0 or later"
+         fi
+     fi
+ fi
+diff --git a/output/mp4.c b/output/mp4.c
+index 944e777113c4919520aeae131b542b9b2e0d3366..200cb33a9a19ae41c74f8b057cea3fdd0daf71af 100644
+--- a/output/mp4.c
++++ b/output/mp4.c
+@@ -147,7 +147,11 @@ static int close_file( hnd_t handle, int64_t largest_pts, int64_t second_largest
+             {
+                 uint32_t mvhd_timescale = gf_isom_get_timescale( p_mp4->p_file );
+                 uint64_t tkhd_duration = (uint64_t)( mdhd_duration * ( (double)mvhd_timescale / p_mp4->i_time_res ) );
++#if GPAC_VERSION_MAJOR > 8
++                gf_isom_append_edit( p_mp4->p_file, p_mp4->i_track, tkhd_duration, sample->CTS_Offset, GF_ISOM_EDIT_NORMAL );
++#else
+                 gf_isom_append_edit_segment( p_mp4->p_file, p_mp4->i_track, tkhd_duration, sample->CTS_Offset, GF_ISOM_EDIT_NORMAL );
++#endif
+             }
+             gf_isom_sample_del( &sample );
+ 
+@@ -233,7 +237,7 @@ static int set_param( hnd_t handle, x264_param_t *p_param )
+             dw *= sar;
+         else
+             dh /= sar;
+-        gf_isom_set_pixel_aspect_ratio( p_mp4->p_file, p_mp4->i_track, p_mp4->i_descidx, p_param->vui.i_sar_width, p_param->vui.i_sar_height );
++        gf_isom_set_pixel_aspect_ratio( p_mp4->p_file, p_mp4->i_track, p_mp4->i_descidx, p_param->vui.i_sar_width, p_param->vui.i_sar_height, 0 );
+         gf_isom_set_track_layout_info( p_mp4->p_file, p_mp4->i_track, dw, dh, 0, 0, 0 );
+     }
+ 
diff --git a/x264-gpac.patch b/x264-gpac.patch
index 3979342..e43bff0 100644
--- a/x264-gpac.patch
+++ b/x264-gpac.patch
@@ -5,7 +5,7 @@
      gpac="no"
      GPAC_LIBS="-lgpac_static"
 -    cc_check "" -lz && GPAC_LIBS="$GPAC_LIBS -lz"
-+    for lib in -lz -lssl -lcrypto -lpng -ljpeg; do
++    for lib in -lz -lssl -lcrypto -lpng -ljpeg -ldl -llzma -lgpac -lGL -lGLU -lavdevice -lavfilter -lfaad -lmad -lxvidcore -la52 -lvorbis -ltheora -lopenjpeg; do
 +        cc_check "" $lib && GPAC_LIBS="$GPAC_LIBS $lib"
 +    done
      if [ "$SYS" = "WINDOWS" ] ; then
diff --git a/x264.spec b/x264.spec
index cfec720..099cc11 100644
--- a/x264.spec
+++ b/x264.spec
@@ -31,7 +31,7 @@
 Summary: H264/AVC video streams encoder
 Name: x264
 Version: 0.%{api}
-Release: 8%{?gver}%{?_with_bootstrap:_bootstrap}%{?dist}
+Release: 9%{?gver}%{?_with_bootstrap:_bootstrap}%{?dist}
 License: GPLv2+
 URL: https://www.videolan.org/developers/x264.html
 Source0: %{name}-0.%{api}-%{snapshot}.tar.bz2
@@ -43,6 +43,7 @@ Patch0: x264-nover.patch
 Patch1: x264-10b.patch
 Patch10: x264-gpac.patch
 Patch11: x264-opencl.patch
+Patch12: 7c2004b58c26da661618262c9c06b73ad3a9ff6c.diff
 
 BuildRequires: gcc
 %{!?_without_gpac:BuildRequires: gpac-devel-static zlib-devel openssl-devel libpng-devel libjpeg-devel}
@@ -100,6 +101,7 @@ pushd %{name}-0.%{api}-%{snapshot}
 %patch1 -p1 -b .10b
 %patch10 -p1 -b .gpac
 %patch11 -p1 -b .opencl
+%patch12 -p1 -b .gpac8
 popd
 
 variants="generic generic10"
@@ -207,6 +209,9 @@ install -pm644 generic/{AUTHORS,COPYING} %{buildroot}%{_pkgdocdir}/
 %endif
 
 %changelog
+* Mon Jul 06 2020 Sérgio Basto <sergio@serjux.com> - 0.159-9.20200409git296494a
+- Fix detection of gpac
+
 * Wed Jun 10 2020 Sérgio Basto <sergio@serjux.com> - 0.159-8.20200409git296494a
 - Update to 0.159-20200409git296494a (stable branch)
 - Replace all __make _smp_mflags by make_build macro