Audio/Video Out of Sync with Samsung NX1000 Camera - Why?
I have a similar problem and that's how I found your question online today... The Mp4 file from my nx1000 was imported as it is on adobe premiere cs3.

The audio and video seem to have same starting and ending point, but the video alone is faster than the original as if it was stretched, and the audio has the normal speed but ends in the middle of the original sound track.

Knowing that I imported the file to a project with the same settings as video, 1080i 29.9fps... I tried again with 25fps and with a video card and without a video card... In vain

The only way I got it right, is unfortunately by decoding it on a software called procoder, to a different format (i chose *.mov), and it worked like a charm on my editing software. But of course I lost resolution... I did not buy the nx1000 so i can decode it and lose resolution for editing!

There should be an answer, I hope you found yours!