Video updates for Ubuntu.

qgroundcontrol.pro

@@ -53,6 +53,11 @@ contains (DEFINES, QGC_DISABLE_UVC) {
 } else:exists(user_config.pri):infile(user_config.pri, DEFINES, QGC_DISABLE_UVC) {
     message("Skipping support for UVC devices (manual override from user_config.pri)")
     DEFINES += QGC_DISABLE_UVC
+} else:LinuxBuild {
+    contains(QT_VERSION, 5.5.1) {
+        message("Skipping support for UVC devices (conflict with Qt 5.5.1 on Ubuntu)")
+        DEFINES += QGC_DISABLE_UVC
+    }
 }
 
 LinuxBuild {

src/VideoStreaming/VideoStreaming.pri

@@ -186,7 +186,7 @@ VideoEnabled {
         }
         LinuxBuild {
             message("  You can install it using apt-get")
-            message("  sudo apt-get install libgstreamer-plugins-base1.0-dev libgstreamer1.0-0:amd64 libgstreamer1.0-dev")
+            message("  sudo apt-get install gstreamer1.0*")
         }
         WindowsBuild {
             message("  You can download it from http://gstreamer.freedesktop.org/data/pkg/windows/")