Add patch to fix fedora ffmpeg broken ABI change

ffmpeg-chromium.patch

@@ -0,0 +1,46 @@
+From d32aacab65a322b66d6a1b48f6cdb03e42bde0f9 Mon Sep 17 00:00:00 2001
+From: Frank Liberato <liberato@chromium.org>
+Date: Wed, 7 Jul 2021 19:01:22 -0700
+Subject: [PATCH] Add av_stream_get_first_dts for Chromium
+
+---
+ libavformat/avformat.h | 4 ++++
+ libavformat/utils.c    | 7 +++++++
+ 2 files changed, 11 insertions(+)
+
+diff --git a/libavformat/avformat.h b/libavformat/avformat.h
+index 1916aa2dc5..e6682849fa 100644
+--- a/libavformat/avformat.h
++++ b/libavformat/avformat.h
+@@ -1019,6 +1019,10 @@ attribute_deprecated
+ int64_t    av_stream_get_end_pts(const AVStream *st);
+ #endif
+ 
++// Chromium: We use the internal field first_dts vvv
++int64_t    av_stream_get_first_dts(const AVStream *st);
++// Chromium: We use the internal field first_dts ^^^
++
+ #define AV_PROGRAM_RUNNING 1
+ 
+ /**
+diff --git a/libavformat/utils.c b/libavformat/utils.c
+index cf4d68bff9..7d750abf88 100644
+--- a/libavformat/utils.c
++++ b/libavformat/utils.c
+@@ -55,6 +55,13 @@ int ff_unlock_avformat(void)
+     return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
+ }
+ 
++// Chromium: We use the internal field first_dts vvv
++int64_t av_stream_get_first_dts(const AVStream *st)
++{
++  return cffstream(st)->first_dts;
++}
++// Chromium: We use the internal field first_dts ^^^
++
+ /* an arbitrarily chosen "sane" max packet size -- 50M */
+ #define SANE_CHUNK_SIZE (50000000)
+ 
+-- 
+2.41.0
+

ffmpeg.spec

@@ -122,6 +122,8 @@ Source0:        https://ffmpeg.org/releases/ffmpeg-%{version}.tar.xz
 Source1:        https://ffmpeg.org/releases/ffmpeg-%{version}.tar.xz.asc
 Source2:        https://ffmpeg.org/ffmpeg-devel.asc
 %endif
+# We don't endorse adding this patch but fedora insists on breaking the ffmpeg ABI
+Patch0:         ffmpeg-chromium.patch
 Conflicts:      %{name}-free
 Requires:       %{name}-libs%{?_isa} = %{version}-%{release}
 %{?_with_cuda:BuildRequires: cuda-minimal-build-%{_cuda_version_rpm} cuda-drivers-devel}