-- Synced movie playback in Mac OS X and Quicktime Player (assuming sync at movie start)

-- Play-Pause

    tell application "QuickTime Player"
        set isPlaying to (playing of document 1)
        set doc1time to current time of document 1
        tell every document
            if isPlaying then pause
            set current time to doc1time
            if not isPlaying then play
        end tell
    end tell

-- Forward 30 Seconds

    tell application "QuickTime Player"
        set isPlaying to (playing of document 1)
        set doc1time to current time of document 1
        tell every document
            set current time to doc1time + 30
        end tell
    end tell

-- Reverse 10 seconds

    tell application "QuickTime Player"
        set isPlaying to (playing of document 1)
        set doc1time to current time of document 1
        tell every document
            set current time to doc1time - 10
        end tell
    end tell