I’ve got a client that likes to get spots in MPEG-2 also for use on a PC. We ran into the same problem. The solution: A free program called MPEG Streamclip (Google it).
Here’s the step by step:
1. Create an MPEG-2 and AIF of the spot. Be sure the two files are named the same EXCEPT for the file type extension.
2. Open “MPEG Streamclip”
3. From the File menu, select “Open Files…”. Select your “.m2v” clip. The audio file should follow along.
4. From the File menu, select “Convert to MPEG with MP2 Audio…”
5. Save the file
It only takes a couple seconds to convert, and you wind up with a “.mpeg” that works on a PC.