DVD & Blu-Ray audio out of sync after export

Question

When I use FCP X's built in DVD or Blu-ray export option, about halfway through the video, the audio becomes out of sync and becomes ahead of the video.
How can I fix this?

Answer 1

Freddy,
   You will see that I am experiencing the same issue with my DVDs and BDs per my question 3 hours prior to yours.  It never was an issue until very recently.  I may have a solution.  Realizing that my audio was acting as if I had "Drop Frame" audio attached to "Non-Drop Frame" video, I went back to my source material to verify my acquisition settings.  All elements of the production were recorded appropriately as "Drop Frame."  Playback on the "Timeline" (Passé now) was perfect.  No audio sync issues there.  So I felt it must be some rendering setting within Compressor and the render engine.  When you go to Compessor (Send to Compressor), you will gain access to the audio render settings for both DVD & BD.  Typically, the "Retiming" under the "General" tab of the Audio Inspector is set to "100% of source."  I Went ahead and checked off the radio button below that to render the audio at the exact duration of my program (nearly 3 hrs long).  I did this for the DVD version of the program and placed it into DVD Studio Pro to replace the bad sync audio.  Well wudda ya know....it worked.  I haven't burned the DVD yet, but that is next.  I suspect that if this works for the DVD, it may work for the BD render as well.  Wish me luck.  I hope this helps.
  On a side note:  If all else fails, render a MASSIVE master file and use that in Toast to make a BD.  Not the best option, but it will get you out the door.
Robert Land