diff --git a/common b/common
index 063ebfd201..d6e219fd07 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 063ebfd201ca87f316bf478d19440a585ce0af2c
+Subproject commit d6e219fd076d8f182bd1ee84228b1b85cdb807a6
diff --git a/m4/gst-matroska.m4 b/m4/gst-matroska.m4
new file mode 100644
index 0000000000..7e52dd96cc
--- /dev/null
+++ b/m4/gst-matroska.m4
@@ -0,0 +1,262 @@
+# Configure paths for libebml
+
+dnl PATH_EBML([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Test for libebml, and define EBML_CFLAGS and EBML_LIBS
+dnl
+AC_DEFUN(PATH_EBML,
+[dnl 
+dnl Get the cflags and libraries
+dnl
+AC_ARG_WITH(ebml-prefix,[  --with-ebml-prefix=PFX        Prefix where libebml is installed (optional)], ebml_prefix="$withval", ebml_prefix="")
+AC_ARG_WITH(ebml-include,[  --with-ebml-include=DIR       Path to where the libebml include files installed (optional)], ebml_include="$withval", ebml_include="")
+AC_ARG_WITH(ebml-lib,[  --with-ebml-lib=DIR           Path to where the libebml library installed (optional)], ebml_lib="$withval", ebml_lib="")
+AC_ARG_ENABLE(ebmltest, [  --disable-ebmltest            Do not try to compile and run a test EBML program],, enable_ebmltest=yes)
+
+  if test "x$ebml_prefix" != "x"; then
+    ebml_args="$ebml_args --prefix=$ebml_prefix"
+    if test "x$ebml_include" != "x"; then
+      EBML_CFLAGS="-I$ebml_include"
+    else
+      EBML_CFLAGS="-I$ebml_prefix/include"
+    fi
+    if test "x$ebml_lib" != "x"; then
+      EBML_LIBS="-L$ebml_lib"
+    else
+      EBML_LIBS="-L$ebml_prefix/lib"
+    fi
+  elif test "x$prefix" != "xNONE"; then
+    ebml_args="$ebml_args --prefix=$prefix"
+    if test "x$ebml_include" != "x"; then
+      EBML_CFLAGS="-I$ebml_include"
+    else
+      EBML_CFLAGS="-I$prefix/include"
+    fi
+    if test "x$ebml_lib" != "x"; then
+      EBML_LIBS="-L$ebml_lib"
+    else
+      EBML_LIBS="-L$prefix/lib"
+    fi
+  else
+    if test "x$ebml_include" != "x"; then
+      EBML_CFLAGS="-I$ebml_include"
+    else
+      EBML_CFLAGS="-I/usr/include/ebml -I/usr/local/include/ebml"
+    fi
+    if test "x$ebml_lib" != "x"; then
+      EBML_LIBS="-L$ebml_lib"
+    else
+      EBML_LIBS="-L/usr/local/lib"
+    fi
+  fi
+
+  EBML_LIBS="$EBML_LIBS -lebml"
+
+  AC_MSG_CHECKING(for EBML)
+  no_ebml=""
+
+
+  if test "x$enable_ebmltest" = "xyes" ; then
+    ac_save_CFLAGS="$CFLAGS"
+    ac_save_LIBS="$LIBS"
+    CFLAGS="$CFLAGS $EBML_CFLAGS"
+    LIBS="$LIBS $EBML_LIBS"
+dnl
+dnl Now check if the installed EBML is sufficiently new.
+dnl
+      rm -f conf.ebmltest
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <EbmlConfig.h>
+
+int main ()
+{
+  system("touch conf.ebmltest");
+  return 0;
+}
+
+],, no_ebml=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+  fi
+
+  if test "x$no_ebml" = "x" ; then
+     AC_MSG_RESULT(yes)
+     ifelse([$1], , :, [$1])     
+  else
+     AC_MSG_RESULT(no)
+     if test -f conf.ebmltest ; then
+       :
+     else
+       echo "*** Could not run Ebml test program, checking why..."
+       CFLAGS="$CFLAGS $EBML_CFLAGS"
+       LIBS="$LIBS $EBML_LIBS"
+       AC_TRY_LINK([
+#include <stdio.h>
+#include <EbmlConfig.h>
+],     [ return 0; ],
+       [ echo "*** The test program compiled, but did not run. This usually means"
+       echo "*** that the run-time linker is not finding EBML or finding the wrong"
+       echo "*** version of EBML. If it is not finding EBML, you'll need to set your"
+       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+       echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+       echo "*** is required on your system"
+       echo "***"
+       echo "*** If you have an old version installed, it is best to remove it, although"
+       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
+       [ echo "*** The test program failed to compile or link. See the file config.log for the"
+       echo "*** exact error that occured. This usually means EBML was incorrectly installed"
+       echo "*** or that you have moved EBML since it was installed." ])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+     EBML_CFLAGS=""
+     EBML_LIBS=""
+     ifelse([$2], , :, [$2])
+  fi
+  AC_SUBST(EBML_CFLAGS)
+  AC_SUBST(EBML_LIBS)
+  rm -f conf.ebmltest
+])
+
+# Configure paths for libmatroska
+
+dnl PATH_MATROSKA(MIN_VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Test for libmatroska, and define MATROSKA_CFLAGS and MATROSKA_LIBS
+dnl
+AC_DEFUN(PATH_MATROSKA,
+[dnl 
+dnl Get the cflags and libraries
+dnl
+AC_ARG_WITH(matroska-prefix,[  --with-matroska-prefix=PFX    Prefix where libmatroska is installed (optional)], matroska_prefix="$withval", matroska_prefix="")
+AC_ARG_WITH(matroska-include,[  --with-matroska-include=DIR   Path to where the libmatroska include files installed (optional)], matroska_include="$withval", matroska_include="")
+AC_ARG_WITH(matroska-lib,[  --with-matroska-lib=DIR       Path to where the libmatroska library installed (optional)], matroska_lib="$withval", matroska_lib="")
+AC_ARG_ENABLE(matroskatest, [  --disable-matroskatest        Do not try to compile and run a test Matroska program],, enable_matroskatest=yes)
+
+  if test "x$matroska_prefix" != "x"; then
+    matroska_args="$matroska_args --prefix=$matroska_prefix"
+    if test "x$matroska_include" != "x"; then
+      MATROSKA_CFLAGS="-I$matroska_include"
+    else
+      MATROSKA_CFLAGS="-I$matroska_prefix/include"
+    fi
+    if test "x$matroska_lib" != "x"; then
+      MATROSKA_LIBS="-L$matroska_lib"
+    else
+      MATROSKA_LIBS="-L$matroska_prefix/lib"
+    fi
+  elif test "x$prefix" != "xNONE"; then
+    matroska_args="$matroska_args --prefix=$prefix"
+    if test "x$matroska_include" != "x"; then
+      MATROSKA_CFLAGS="-I$matroska_include"
+    else
+      MATROSKA_CFLAGS="-I$prefix/include"
+    fi
+    if test "x$matroska_lib" != "x"; then
+      MATROSKA_LIBS="-L$matroska_lib"
+    else
+      MATROSKA_LIBS="-L$prefix/lib"
+    fi
+  else
+    if test "x$matroska_include" != "x"; then
+      MATROSKA_CFLAGS="-I$matroska_include"
+    else
+      MATROSKA_CFLAGS="-I/usr/include/matroska -I/usr/local/include/matroska"
+    fi
+    if test "x$matroska_lib" != "x"; then
+      MATROSKA_LIBS="-L$matroska_lib"
+    else
+      MATROSKA_LIBS="-L/usr/local/lib"
+    fi
+  fi
+
+  MATROSKA_LIBS="$MATROSKA_LIBS -lmatroska"
+
+  AC_MSG_CHECKING(for Matroska)
+  no_matroska=""
+
+
+  if test "x$enable_matroskatest" = "xyes" ; then
+    ac_save_CXXFLAGS="$CXXFLAGS"
+    ac_save_LIBS="$LIBS"
+    CXXFLAGS="$CXXFLAGS $MATROSKA_CFLAGS $EBML_CFLAGS"
+    LIBS="$LIBS $MATROSKA_LIBS $EBML_LIBS"
+dnl
+dnl Now check if the installed Matroska is sufficiently new.
+dnl
+      rm -f conf.matroskatest
+      AC_LANG_CPLUSPLUS
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <EbmlConfig.h>
+#include <KaxVersion.h>
+
+using namespace LIBMATROSKA_NAMESPACE;
+
+int main ()
+{
+  FILE *f;
+  f = fopen("conf.matroskatest", "wb");
+  if (f == NULL)
+    return 1;
+  fprintf(f, "%s\n", KaxCodeVersion.c_str());
+  fclose(f);
+  return 0;
+}
+
+],, no_matroska=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+      AC_LANG_C
+      CXXFLAGS="$ac_save_CXXFLAGS"
+      LIBS="$ac_save_LIBS"
+  fi
+
+  if test "x$no_matroska" = "x" -a -f conf.matroskatest ; then
+    AC_MSG_RESULT(yes)
+
+    AC_MSG_CHECKING(Matroska version)
+
+    matroska_version=`cat conf.matroskatest`
+    mk_MAJVER=`echo $1 | cut -d"." -f1`
+    mk_MINVER=`echo $1 | cut -d"." -f2`
+    mk_RELVER=`echo $1 | cut -d"." -f3`
+    mver_ok=`sed 's;\.;\ ;g' < conf.matroskatest | (read -a mver
+    if test ${mver[[0]]} -gt $mk_MAJVER ; then
+      mver_ok=1
+    elif test ${mver[[0]]} -lt $mk_MAJVER ; then
+      mver_ok=0
+    else
+      if test ${mver[[1]]} -gt $mk_MINVER ; then
+        mver_ok=1
+      elif test ${mver[[1]]} -lt $mk_MINVER ; then
+        mver_ok=0
+      else
+        if test ${mver[[2]]} -ge $mk_RELVER ; then
+          mver_ok=1
+        else
+          mver_ok=0
+        fi
+      fi
+    fi
+    echo $mver_ok )`
+    if test "$mver_ok" = "1" ; then
+      AC_MSG_RESULT($matroska_version ok)
+       ifelse([$2], , :, [$2])     
+    else
+      AC_MSG_RESULT($matroska_version too old)
+      echo '*** Your Matroska version is too old. Upgrade to at least version'
+      echo '*** $1 and re-run configure.'
+       ifelse([$3], , :, [$3])     
+    fi
+
+  else
+     AC_MSG_RESULT(no)
+     ifelse([$3], , :, [$3])
+  fi
+
+  AC_SUBST(MATROSKA_CFLAGS)
+  AC_SUBST(MATROSKA_LIBS)
+  rm -f conf.matroskatest
+])