Merge pull request #3477 from DonLakeFlyer/OSXGStreamerInstall

Install gstreamer on OSX travis

.travis.yml

@@ -23,6 +23,7 @@ matrix:
         - os: osx
           osx_image: xcode7
           env: SPEC=macx-clang CONFIG=debug QT_FATAL_WARNINGS=1
+          sudo: required
         - os: osx
           osx_image: xcode7
           env: SPEC=macx-clang CONFIG=installer
@@ -81,8 +82,6 @@ before_install:
         ;
     fi
   - if [ "${TRAVIS_OS_NAME}" = "osx" ]; then
-        wget http://gstreamer.freedesktop.org/data/pkg/osx/1.5.2/gstreamer-1.0-devel-1.5.2-x86_64.pkg &&
-        wget http://gstreamer.freedesktop.org/data/pkg/osx/1.5.2/gstreamer-1.0-1.5.2-x86_64.pkg &&
         mkdir -p ~/Library/Preferences/QtProject/ &&
         cp ${TRAVIS_BUILD_DIR}/test/qtlogging.ini ~/Library/Preferences/QtProject/
         ;
@@ -106,6 +105,10 @@ install:
         ;
     fi
   - if [[ "${TRAVIS_OS_NAME}" = "osx" && "${SPEC}" != "ios" ]]; then
+        wget http://gstreamer.freedesktop.org/data/pkg/osx/1.5.2/gstreamer-1.0-devel-1.5.2-x86_64.pkg &&
+        wget http://gstreamer.freedesktop.org/data/pkg/osx/1.5.2/gstreamer-1.0-1.5.2-x86_64.pkg &&
+        sudo installer -verboseR -pkg gstreamer-1.0-devel-1.5.2-x86_64.pkg -target / &&
+        sudo installer -verboseR -pkg gstreamer-1.0-1.5.2-x86_64.pkg -target / &&
         wget https://s3-us-west-2.amazonaws.com/qgroundcontrol/dependencies/Qt5.5.1-mac-clang.tar.bz2 &&
         tar jxf Qt5.5.1-mac-clang.tar.bz2 -C /tmp &&
         wget https://s3-us-west-2.amazonaws.com/qgroundcontrol/dependencies/osx-gstreamer.tar.bz2 &&