Changed BackgroundEffects files to apply the playback rate to videos. Added GetUpdateRate to ActorFrame and Get/SetDecodeMovie to Sprite. Hope nobody is caught off guard by checkerboard no longer playing videos back at 4x rate.

BackgroundEffects/StretchNoLoop.lua

@@ -6,7 +6,14 @@ local t = Def.ActorFrame {
 			self:xy(SCREEN_CENTER_X,SCREEN_CENTER_Y)
 			self:scale_or_crop_background()
 			self:diffuse(Color1)
-			if self.loop ~= nil then
+			-- The playback rate in the simfile is used to set the update rate
+			-- on the ActorFrame, but effectclock("music") causes the sprite to
+			-- ignore the passed in delta time and use the music time instead.
+			-- So this passes the update rate in to the texture. -Kyz
+			if self.GetTexture then
+				self:GetTexture():rate(self:GetParent():GetUpdateRate())
+			end
+			if self.loop then
 				self:loop(false)
 				-- make videos start at beginning to prevent sticking on last frame
 				self:position(0)