kestrelwx: The upstream CMake recipe does not link ffmpeg's libavutil,
resulting in a build failure. INCLUDE_DIRS from pkg-config here are actually
empty inside the build enviornment, but don't seem to affect the build.
Relevant upstream issue:
https://git.jami.net/savoirfairelinux/jami-client-qt/-/issues/2110

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 29bfde9a..db46776e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -453,12 +453,6 @@ endif()
 
 # For libavutil/avframe.
 set(LIBJAMI_CONTRIB_DIR "${DAEMON_DIR}/contrib")
-find_path(AVUTIL_INCLUDE_DIR libavutil/avutil.h
-  PATHS
-  ${LIBJAMI_CONTRIB_DIR}/native/ffmpeg
-  ${LIBJAMI_CONTRIB_DIR}/${CONTRIB_DARWIN_FOLDER}/include/
-  ${LIBJAMI_CONTRIB_DIR}/build/ffmpeg/Build/win32/x64/include)
-include_directories(${AVUTIL_INCLUDE_DIR})
 
 find_package(Vulkan)
 if(Vulkan_FOUND)
@@ -479,6 +473,11 @@ endif()
 
 find_package(PkgConfig REQUIRED)
 
+# avutil
+pkg_search_module(avutil IMPORTED_TARGET libavutil)
+list(APPEND CLIENT_LIBS PkgConfig::avutil)
+include_directories(${avutil_INCLUDE_DIRS})
+
 # hunspell
 pkg_search_module(hunspell IMPORTED_TARGET hunspell)
 if(hunspell_FOUND)
diff --git a/src/libclient/CMakeLists.txt b/src/libclient/CMakeLists.txt
index 01405038..b56a621b 100644
--- a/src/libclient/CMakeLists.txt
+++ b/src/libclient/CMakeLists.txt
@@ -318,11 +318,9 @@ if(APPLE)
   endif()
 endif()
 
-find_path(AVUTIL_INCLUDE_DIR libavutil/avutil.h
-  PATHS
-  ${LIBJAMI_CONTRIB_DIR}/native/ffmpeg
-  ${LIBJAMI_CONTRIB_DIR}/${CONTRIB_DARWIN_FOLDER}/include/
-  ${LIBJAMI_CONTRIB_DIR}/build/ffmpeg/Build/win32/x64/include)
+pkg_search_module(AVUTIL libavutil)
+set(AVUTIL_INCLUDE_DIR ${AVUTIL_INCLUDE_DIRS})
+set(AVUTIL_LIBRARY ${AVUTIL_LIBRARIES})
 include_directories(${AVUTIL_INCLUDE_DIR})
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
   execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpmachine