diff --git a/cross/libebml/Makefile b/cross/libebml/Makefile
new file mode 100644
index 00000000000..f29a3ef530b
--- /dev/null
+++ b/cross/libebml/Makefile
@@ -0,0 +1,16 @@
+PKG_NAME = libebml
+PKG_VERS = 1.3.9
+PKG_EXT = tar.xz
+PKG_DIST_NAME = $(PKG_NAME)-$(PKG_VERS).$(PKG_EXT)
+PKG_DIST_SITE = https://dl.matroska.org/downloads/$(PKG_NAME)
+PKG_DIR = $(PKG_NAME)-$(PKG_VERS)
+
+DEPENDS =
+
+HOMEPAGE = http://matroska.org
+COMMENT  = libebml is a C++ libary to parse EBML files.
+LICENSE  = LGPL
+
+GNU_CONFIGURE = 1
+
+include ../../mk/spksrc.cross-cmake.mk
diff --git a/cross/libebml/PLIST b/cross/libebml/PLIST
new file mode 100644
index 00000000000..a775cfabba8
--- /dev/null
+++ b/cross/libebml/PLIST
@@ -0,0 +1,3 @@
+lnk:lib/libebml.so
+lnk:lib/libebml.so.4
+lib:lib/libebml.so.4.0.0
diff --git a/cross/libebml/digests b/cross/libebml/digests
new file mode 100644
index 00000000000..66a22f07200
--- /dev/null
+++ b/cross/libebml/digests
@@ -0,0 +1,3 @@
+libebml-1.3.9.tar.xz SHA1 abdcaac0f10756271ad6a15a2147e9bc51cd8661
+libebml-1.3.9.tar.xz SHA256 c6b6c6cd8b20a46203cb5dce636883aef68beb2846f1e4103b660a7da2c9c548
+libebml-1.3.9.tar.xz MD5 319f99898751052f13334c0df7d19d02
diff --git a/cross/libmatroska/Makefile b/cross/libmatroska/Makefile
new file mode 100644
index 00000000000..049d3c28680
--- /dev/null
+++ b/cross/libmatroska/Makefile
@@ -0,0 +1,16 @@
+PKG_NAME = libmatroska
+PKG_VERS = 1.5.2
+PKG_EXT = tar.xz
+PKG_DIST_NAME = $(PKG_NAME)-$(PKG_VERS).$(PKG_EXT)
+PKG_DIST_SITE = https://dl.matroska.org/downloads/$(PKG_NAME)
+PKG_DIR = $(PKG_NAME)-$(PKG_VERS)
+
+DEPENDS = cross/libebml
+
+HOMEPAGE = https://matroska.org/
+COMMENT  = libmatroska is a C++ libary to parse Matroska files (.mkv and .mka).
+LICENSE  = LGPL
+
+GNU_CONFIGURE = 1
+
+include ../../mk/spksrc.cross-cmake.mk
diff --git a/cross/libmatroska/PLIST b/cross/libmatroska/PLIST
new file mode 100644
index 00000000000..a6510101581
--- /dev/null
+++ b/cross/libmatroska/PLIST
@@ -0,0 +1,3 @@
+lnk:lib/libmatroska.so
+lnk:lib/libmatroska.so.6
+lib:lib/libmatroska.so.6.0.0
diff --git a/cross/libmatroska/digests b/cross/libmatroska/digests
new file mode 100644
index 00000000000..f1fc40217ac
--- /dev/null
+++ b/cross/libmatroska/digests
@@ -0,0 +1,3 @@
+libmatroska-1.5.2.tar.xz SHA1 d7426212bf98d18619a70c5a9bbda1089b3e59c9
+libmatroska-1.5.2.tar.xz SHA256 0ac6debfbf781d47f001b830aaf9be9dfbcefd13bcfb80ca5efc1c04b4a3c962
+libmatroska-1.5.2.tar.xz MD5 df59a50db89296cad8662abf596355a9
diff --git a/cross/mkvtoolnix/Makefile b/cross/mkvtoolnix/Makefile
new file mode 100644
index 00000000000..f9311bfded8
--- /dev/null
+++ b/cross/mkvtoolnix/Makefile
@@ -0,0 +1,49 @@
+PKG_NAME = mkvtoolnix
+PKG_VERS = 22.0.0
+PKG_EXT = tar.xz
+PKG_DIST_NAME = $(PKG_NAME)-$(PKG_VERS).$(PKG_EXT)
+PKG_DIST_SITE = https://mkvtoolnix.download/sources
+PKG_DIR = $(PKG_NAME)-$(PKG_VERS)
+
+# compiler too old, gcc >= 4.9.x required.
+UNSUPPORTED_ARCHS = $(ARMv5_ARCHS) $(ARMv7L_ARCHS) $(OLD_PPC_ARCHS)
+
+BUILD_DEPENDS = native/ruby
+DEPENDS = cross/boost cross/libogg cross/libvorbis cross/zlib 
+DEPENDS += cross/flac cross/file
+DEPENDS += cross/libebml cross/libmatroska
+
+HOMEPAGE = https://mkvtoolnix.download/index.html
+COMMENT  = MKVToolNix is a set of tools to create, alter and inspect Matroska files.
+LICENSE  = GPLv2
+
+GNU_CONFIGURE = 1
+COMPILE_TARGET = mkvtoolnix_compile
+INSTALL_TARGET = mkvtoolnix_install
+
+CONFIGURE_ARGS = --prefix=$(STAGING_INSTALL_PREFIX)
+CONFIGURE_ARGS += --with-boost-libdir=$(STAGING_INSTALL_PREFIX)/lib
+
+BOOST_LIBRARIES = system filesystem regex date_time
+ENV += BOOST_LIBRARIES="$(BOOST_LIBRARIES)"
+
+NATIVE_RUBY_DIR = $(realpath $(WORK_DIR)/../../../native/ruby/work-native/install/usr/local/bin)
+ENV += PATH=$(NATIVE_RUBY_DIR):$$PATH
+
+include ../../mk/spksrc.common.mk
+ifeq ($(call version_ge, ${TCVERSION}, 7.0),1)
+# fix compilation with newer compilers
+ADDITIONAL_CXXFLAGS = -D_GLIBCXX_USE_C99_MATH=1
+# disable warnings (by includes of boost header files)
+ADDITIONAL_CXXFLAGS += -Wno-implicit-fallthrough
+endif
+
+include ../../mk/spksrc.cross-cc.mk
+
+.PHONY: mkvtoolnix_compile
+mkvtoolnix_compile:
+	$(RUN) rake
+
+.PHONY: mkvtoolnix_install
+mkvtoolnix_install:
+	$(RUN) rake install
diff --git a/cross/mkvtoolnix/PLIST b/cross/mkvtoolnix/PLIST
new file mode 100644
index 00000000000..ecaec81246c
--- /dev/null
+++ b/cross/mkvtoolnix/PLIST
@@ -0,0 +1,5 @@
+bin:bin/mkvextract
+bin:bin/mkvinfo
+bin:bin/mkvmerge
+bin:bin/mkvpropedit
+rsc:share/locale/
diff --git a/cross/mkvtoolnix/digests b/cross/mkvtoolnix/digests
new file mode 100644
index 00000000000..0f5f75d05f2
--- /dev/null
+++ b/cross/mkvtoolnix/digests
@@ -0,0 +1,3 @@
+mkvtoolnix-22.0.0.tar.xz SHA1 36719c113c5667de0bef4ee4aafd4060bf19ff4c
+mkvtoolnix-22.0.0.tar.xz SHA256 88c5074d6731b65d5c2ddd02113ae064373eb83ef3e6e00a04876f88c0be7f67
+mkvtoolnix-22.0.0.tar.xz MD5 1472762ea8cbafe03b7b827480b86e55
diff --git a/spk/mkvtoolnix/Makefile b/spk/mkvtoolnix/Makefile
new file mode 100644
index 00000000000..255a48a0965
--- /dev/null
+++ b/spk/mkvtoolnix/Makefile
@@ -0,0 +1,22 @@
+SPK_NAME = mkvtoolnix
+SPK_VERS = 22.0.0
+SPK_REV = 1
+SPK_ICON = src/$(SPK_NAME).png
+
+DEPENDS = cross/$(SPK_NAME)
+
+# compiler too old, gcc >= 4.9.x required.
+UNSUPPORTED_ARCHS = $(ARMv5_ARCHS) $(ARMv7L_ARCHS) $(OLD_PPC_ARCHS)
+
+MAINTAINER = cytec
+DESCRIPTION = MKVToolNix is a set of tools to create, alter and inspect Matroska files.
+CHANGELOG = "Initial package release"
+DISPLAY_NAME = MKVToolNix
+STARTABLE = no
+
+HOMEPAGE = https://mkvtoolnix.download/index.html
+LICENSE  = GPLv2
+
+SPK_COMMANDS = bin/mkvextract bin/mkvinfo bin/mkvmerge bin/mkvpropedit
+
+include ../../mk/spksrc.spk.mk
diff --git a/spk/mkvtoolnix/PLIST b/spk/mkvtoolnix/PLIST
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/spk/mkvtoolnix/src/mkvtoolnix.png b/spk/mkvtoolnix/src/mkvtoolnix.png
new file mode 100644
index 00000000000..19944dc3d64
Binary files /dev/null and b/spk/mkvtoolnix/src/mkvtoolnix.png differ
diff --git a/toolchain/syno-ppc853x-5.1/Makefile b/toolchain/syno-ppc853x-5.1/Makefile
index 166ab8fcf91..00c62ae56b2 100644
--- a/toolchain/syno-ppc853x-5.1/Makefile
+++ b/toolchain/syno-ppc853x-5.1/Makefile
@@ -2,7 +2,7 @@ TC_ARCH = ppc853x
 TC_VERS = 5.1
 TC_FIRMWARE = 5.0-4458
 TC_KERNEL = 2.6.32
-TC_GCC = 4.7.4
+TC_GCC = 4.3.2
 TC_GLIBC = 2.8
 
 TC_DIST = gcc4374_eglibc2874_qoriq-GPL
diff --git a/toolchain/syno-ppc853x-5.2/Makefile b/toolchain/syno-ppc853x-5.2/Makefile
index d81188b222f..113cc5a11fa 100644
--- a/toolchain/syno-ppc853x-5.2/Makefile
+++ b/toolchain/syno-ppc853x-5.2/Makefile
@@ -1,7 +1,7 @@
 TC_ARCH = ppc853x
 TC_VERS = 5.2
 TC_KERNEL = 2.6.32
-TC_GCC = 4.7.4
+TC_GCC = 4.3.2
 TC_GLIBC = 2.8
 
 TC_DIST = 853x-gcc4374_eglibc2874_qoriq-GPL