diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7c2efeb98..729d02409 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -503,17 +503,17 @@ if(USE_FFMPEG)
 	list(APPEND FEATURE_SRC "${CMAKE_CURRENT_SOURCE_DIR}/src/feature/ffmpeg/ffmpeg-encoder.c")
 	string(REGEX MATCH "^[0-9]+" LIBAVCODEC_VERSION_MAJOR ${libavcodec_VERSION})
 	string(REGEX MATCH "^[0-9]+" LIBAVFORMAT_VERSION_MAJOR ${libavformat_VERSION})
-	string(REGEX MATCH "^[0-9]+" LIBAVRESAMPLE_VERSION_MAJOR ${libavresample_VERSION})
 	string(REGEX MATCH "^[0-9]+" LIBAVUTIL_VERSION_MAJOR ${libavutil_VERSION})
-	string(REGEX MATCH "^[0-9]+" LIBSWRESAMPLE_VERSION_MAJOR ${libswresample_VERSION})
 	string(REGEX MATCH "^[0-9]+" LIBSWSCALE_VERSION_MAJOR ${libswscale_VERSION})
-	math(EXPR LIBSWRESAMPLE_VERSION_DEBIAN "${LIBSWRESAMPLE_VERSION_MAJOR} - 1")
 	list(APPEND DEPENDENCY_LIB ${LIBAVCODEC_LIBRARIES} ${LIBAVFORMAT_LIBRARIES} ${LIBAVRESAMPLE_LIBRARIES} ${LIBAVUTIL_LIBRARIES} ${LIBSWSCALE_LIBRARIES} ${LIBSWRESAMPLE_LIBRARIES})
 	set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libavcodec${LIBAVCODEC_VERSION_MAJOR}|libavcodec-extra-${LIBAVCODEC_VERSION_MAJOR}|libavcodec-ffmpeg${LIBAVCODEC_VERSION_MAJOR}|libavcodec-ffmpeg-extra${LIBAVCODEC_VERSION_MAJOR}")
 	set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libavformat${LIBAVFORMAT_VERSION_MAJOR}|libavformat-ffmpeg${LIBAVFORMAT_VERSION_MAJOR}")
 	if(USE_LIBSWRESAMPLE)
+		string(REGEX MATCH "^[0-9]+" LIBSWRESAMPLE_VERSION_MAJOR ${libswresample_VERSION})
+		math(EXPR LIBSWRESAMPLE_VERSION_DEBIAN "${LIBSWRESAMPLE_VERSION_MAJOR} - 1")
 		set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libswresample${LIBSWRESAMPLE_VERSION_DEBIAN}|libswresample-ffmpeg${LIBSWRESAMPLE_VERSION_DEBIAN}")
 	else()
+		string(REGEX MATCH "^[0-9]+" LIBAVRESAMPLE_VERSION_MAJOR ${libavresample_VERSION})
 		set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libavresample${LIBAVRESAMPLE_VERSION_MAJOR}|libavresample-ffmpeg${LIBAVRESAMPLE_VERSION_MAJOR}")
 	endif()
 	set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libavutil${LIBAVUTIL_VERSION_MAJOR}|libavutil-ffmpeg${LIBAVUTIL_VERSION_MAJOR}")
diff --git a/src/core/flags.h.in b/src/core/flags.h.in
index 212c4828a..facd8743a 100644
--- a/src/core/flags.h.in
+++ b/src/core/flags.h.in
@@ -79,6 +79,14 @@
 #cmakedefine USE_LIBAV
 #endif
 
+#ifndef USE_LIBAVRESAMPLE
+#cmakedefine USE_LIBAVRESAMPLE
+#endif
+
+#ifndef USE_LIBSWRESAMPLE
+#cmakedefine USE_LIBSWRESAMPLE
+#endif
+
 #ifndef USE_LIBZIP
 #cmakedefine USE_LIBZIP
 #endif