Index: head/graphics/libavif/Makefile
===================================================================
--- head/graphics/libavif/Makefile	(revision 544254)
+++ head/graphics/libavif/Makefile	(revision 544255)
@@ -1,37 +1,52 @@
 # $FreeBSD$
 
 PORTNAME=	libavif
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.8.1
+PORTREVISION=	1
 CATEGORIES=	graphics
 
 MAINTAINER=	jbeich@FreeBSD.org
 COMMENT=	Library for encoding and decoding .avif files
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libpng.so:graphics/png
 
 USES=		cmake compiler:c11 jpeg localbase:ldflags pkgconfig
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 GH_ACCOUNT=	AOMediaCodec
 CMAKE_ON=	AVIF_BUILD_APPS
 
-OPTIONS_DEFINE=	AOM DAV1D RAV1E
-OPTIONS_DEFAULT=AOM DAV1D
+OPTIONS_DEFINE=	AOM DAV1D PIXBUF RAV1E
+OPTIONS_DEFAULT=AOM DAV1D PIXBUF
+OPTIONS_SUB=	yes
 
 AOM_DESC=		AV1 encoding/decoding via libaom
 AOM_LIB_DEPENDS=	libaom.so:multimedia/aom
 AOM_CMAKE_BOOL=		AVIF_CODEC_AOM
 
 DAV1D_DESC=		AV1 decoding via libdav1d
 DAV1D_LIB_DEPENDS=	libdav1d.so:multimedia/dav1d
 DAV1D_CMAKE_BOOL=	AVIF_CODEC_DAV1D
 
+PIXBUF_USES=		gnome
+PIXBUF_USE=		GNOME=gdkpixbuf2
+PIXBUF_CMAKE_BOOL=	AVIF_BUILD_GDK_PIXBUF
+PIXBUF_CFLAGS=		-Wno-error=cast-qual # https://github.com/AOMediaCodec/libavif/issues/251
+
 RAV1E_DESC=		AV1 encoding via librav1e
 RAV1E_LIB_DEPENDS=	librav1e.so:multimedia/librav1e
 RAV1E_CMAKE_BOOL=	AVIF_CODEC_RAV1E
+
+# XXX Drop after misc/shared-mime-info is updated to 2.0
+PIXBUF_USES+=		shared-mime-info
+PIXBUF_PLIST_FILES+=	share/mime/packages/${PORTNAME}.xml
+do-install-PIXBUF-on:
+	${MKDIR} ${STAGEDIR}${PREFIX}/share/mime/packages
+	${INSTALL_DATA} ${FILESDIR}/mime.xml \
+		${STAGEDIR}${PREFIX}/share/mime/packages/${PORTNAME}.xml
 
 .include <bsd.port.mk>
Index: head/graphics/libavif/files/mime.xml
===================================================================
--- head/graphics/libavif/files/mime.xml	(nonexistent)
+++ head/graphics/libavif/files/mime.xml	(revision 544255)
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+  <!-- https://gitlab.freedesktop.org/xdg/shared-mime-info/commit/d23e9fa537b8 -->
+  <mime-type type="image/avif">
+    <comment>AV1 Image File Format (AVIF)</comment>
+    <magic priority="50">
+        <match type="string" value="ftypavif" offset="4"/>
+        <match type="string" value="ftypmif1" offset="4"/>
+    </magic>
+    <glob pattern="*.avif"/>
+  </mime-type>
+  <mime-type type="image/avif-sequence">
+    <comment>AVIF image sequence</comment>
+    <magic priority="50">
+        <match type="string" value="ftypavis" offset="4"/>
+    </magic>
+    <glob pattern="*.avifs"/>
+  </mime-type>
+</mime-info>

Property changes on: head/graphics/libavif/files/mime.xml
___________________________________________________________________
Added: fbsd:nokeywords
## -0,0 +1 ##
+yes
\ No newline at end of property
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Index: head/graphics/libavif/pkg-plist
===================================================================
--- head/graphics/libavif/pkg-plist	(revision 544254)
+++ head/graphics/libavif/pkg-plist	(revision 544255)
@@ -1,10 +1,13 @@
 bin/avifdec
 bin/avifenc
 include/avif/avif.h
 lib/cmake/libavif/libavif-config-%%CMAKE_BUILD_TYPE%%.cmake
 lib/cmake/libavif/libavif-config-version.cmake
 lib/cmake/libavif/libavif-config.cmake
+%%PIXBUF%%lib/gdk-pixbuf-2.0/%%GTK2_VERSION%%/loaders/libpixbufloader-avif.so
 lib/libavif.so
 lib/libavif.so.6
 lib/libavif.so.6.0.0
 libdata/pkgconfig/libavif.pc
+%%PIXBUF%%@postexec %D/bin/gdk-pixbuf-query-loaders > /dev/null 2>&1 && %D/bin/gdk-pixbuf-query-loaders > %D/lib/gdk-pixbuf-2.0/%%GTK2_VERSION%%/loaders.cache 2>/dev/null || /usr/bin/true
+%%PIXBUF%%@postunexec %D/bin/gdk-pixbuf-query-loaders > /dev/null 2>&1 && %D/bin/gdk-pixbuf-query-loaders > %D/lib/gdk-pixbuf-2.0/%%GTK2_VERSION%%/loaders.cache 2>/dev/null || /usr/bin/true