--- configure.in_old	2009-01-26 21:46:07.000000000 +0100
+++ configure.in	2009-01-26 21:47:25.000000000 +0100
@@ -67,7 +67,7 @@
       AS_HELP_STRING([--disable-avcodec], [Don't build plugins depending on avcodec (a52)]))
 
 if test "x$enable_avcodec" != "xno"; then
-  PKG_CHECK_MODULES(AVCODEC, [libavcodec], [HAVE_AVCODEC=yes], [HAVE_AVCODEC=no])
+  PKG_CHECK_MODULES(AVCODEC, [libavcodec libavutil], [HAVE_AVCODEC=yes], [HAVE_AVCODEC=no])
 fi
 
 if test "x$HAVE_AVCODEC" = "xno"; then