+  set(CMAKE_REQUIRED_LIBRARIES ${FFMPEG_LIBRARIES}) 
+  set(CMAKE_REQUIRED_INCLUDES ${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS}) 
+  check_symbol_exists(avformat_open_input
+    "${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS}/libavformat/avformat.h"
+    HAVE_AVFORMAT_OPEN_INPUT)
+  if(NOT HAVE_AVFORMAT_OPEN_INPUT)
+    message(FATAL_ERROR
+      "Function avformat_open_input missing. Please use a newer FFmpeg release.")
+  endif()