MP4 Audio Sync Correction

I have a single MP4 in which the speaker’s lips move a fraction of a second before the words reach your ears. The delay is consistent—always under a second—so the fix should be a straightforward global shift rather than a scene-by-scene hunt... (Budget: $30 - $250 USD, Jobs: Audio Editing, Audio Engineering, Audio Mastering, Video Editing, Video Post-editing, Video Production, Video Services)