Joining .m4v H.264 files that contain AC3 audio

Hi,

I have several .m4v files with AC3 audio created for home movies using Handbrake.

I am trying to find a way to join these files into a single .m4v file while retaining the AC3 audio track.

QuickTime Pro allows pass-through for the video to eliminate the need for H.264 re-encoding but I don't see a "pass-through" option for AC3 audio in QT Pro.

QT Pro only allows an option for conversion to Stereo AAC.

Does QT Pro simply NOT support AC3 pass-through? Or is there some setting I need to know about?

If this is a known limitation of QT Pro, are there alternative options on Windows 7 for achieving what I am trying to do here?

Thanks,

Kevin