new file mode 100644
@@ -0,0 +1,86 @@
+From 78a97c1ec35ada76d83fc67d0549ba56c74d8875 Mon Sep 17 00:00:00 2001
+From: Seungha Yang <seungha@centricular.com>
+Date: Thu, 7 Jul 2022 22:16:30 +0900
+Subject: [PATCH] libav: Fix for APNG encoder property registration
+
+The AVClass name of Animated PNG in FFmpeg 5.x is "(A)PNG"
+and it will be converted to "-a-png" through
+g_ascii_strdown() and g_strcanon(). But GLib disallow leading '-'
+character for a GType name. Strip leading '-' to workaround it.
+
+Upstream-Status: Backport [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2724]
+
+Seungha Yangs patch was imported without modifications.
+
+Signed-off-by: Claus Stovgaard <claus.stovgaard@gmail.com>
+---
+ ext/libav/gstavcfg.c | 29 +++++++++++++++++++++++------
+ 1 file changed, 23 insertions(+), 6 deletions(-)
+
+diff --git a/ext/libav/gstavcfg.c b/ext/libav/gstavcfg.c
+index c736920..a8635a7 100644
+--- a/ext/libav/gstavcfg.c
++++ b/ext/libav/gstavcfg.c
+@@ -91,10 +91,19 @@ register_enum (const AVClass ** obj, const AVOption * top_opt)
+ gchar *lower_obj_name = g_ascii_strdown ((*obj)->class_name, -1);
+ gchar *enum_name = g_strdup_printf ("%s-%s", lower_obj_name, top_opt->unit);
+ gboolean none_default = TRUE;
++ const gchar *enum_name_strip;
+
+ g_strcanon (enum_name, G_CSET_a_2_z G_CSET_DIGITS, '-');
+
+- if ((res = g_type_from_name (enum_name)))
++ /* strip leading '-'s */
++ enum_name_strip = enum_name;
++ while (enum_name_strip[0] == '-')
++ enum_name_strip++;
++
++ if (enum_name_strip[0] == '\0')
++ goto done;
++
++ if ((res = g_type_from_name (enum_name_strip)))
+ goto done;
+
+ while ((opt = av_opt_next (obj, opt))) {
+@@ -150,9 +159,8 @@ register_enum (const AVClass ** obj, const AVOption * top_opt)
+ }
+ }
+
+- res =
+- g_enum_register_static (enum_name, &g_array_index (values, GEnumValue,
+- 0));
++ res = g_enum_register_static (enum_name_strip,
++ &g_array_index (values, GEnumValue, 0));
+
+ gst_type_mark_as_plugin_api (res, 0);
+ }
+@@ -177,10 +185,19 @@ register_flags (const AVClass ** obj, const AVOption * top_opt)
+ GArray *values = g_array_new (TRUE, TRUE, sizeof (GEnumValue));
+ gchar *lower_obj_name = g_ascii_strdown ((*obj)->class_name, -1);
+ gchar *flags_name = g_strdup_printf ("%s-%s", lower_obj_name, top_opt->unit);
++ const gchar *flags_name_strip;
+
+ g_strcanon (flags_name, G_CSET_a_2_z G_CSET_DIGITS, '-');
+
+- if ((res = g_type_from_name (flags_name)))
++ /* strip leading '-'s */
++ flags_name_strip = flags_name;
++ while (flags_name_strip[0] == '-')
++ flags_name_strip++;
++
++ if (flags_name_strip[0] == '\0')
++ goto done;
++
++ if ((res = g_type_from_name (flags_name_strip)))
+ goto done;
+
+ while ((opt = av_opt_next (obj, opt))) {
+@@ -211,7 +228,7 @@ register_flags (const AVClass ** obj, const AVOption * top_opt)
+ g_array_sort (values, (GCompareFunc) cmp_flags_value);
+
+ res =
+- g_flags_register_static (flags_name, &g_array_index (values,
++ g_flags_register_static (flags_name_strip, &g_array_index (values,
+ GFlagsValue, 0));
+
+ gst_type_mark_as_plugin_api (res, 0);
@@ -11,7 +11,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=69333daa044cb77e486cc36129f7a770 \
file://ext/libav/gstav.h;beginline=1;endline=18;md5=a752c35267d8276fd9ca3db6994fca9c \
"
-SRC_URI = "https://gstreamer.freedesktop.org/src/gst-libav/gst-libav-${PV}.tar.xz"
+SRC_URI = "https://gstreamer.freedesktop.org/src/gst-libav/gst-libav-${PV}.tar.xz \
+ file://0001-libav-Fix-for-APNG-encoder-property-registration.patch \
+ "
SRC_URI[sha256sum] = "3fedd10560fcdfaa1b6462cbf79a38c4e7b57d7f390359393fc0cef6dbf27dfe"
S = "${WORKDIR}/gst-libav-${PV}"