I'm very concerned by Camera and Sound of Galaxy s2 anyway ;(
You can find more information here : http://samsunggalaxysforums.com/showthread.php/7420-Exporting-Video-to-Mac-has-a udio-out-of-sync.-Any-suggestions
I've got the same problem here ;(
Then try the same solution.
1) It appears that most Galaxy SII users either cannot or will not provide sample files for examination. (Most so-called "sample" files posted to the internet turn out to be YouTube converted content.)
2) The first and only sample file I've downloaded to data seems to have multiple problems and was not suitable for checking audio/video synchronization. (I.e., baby chicks scratching around in a box does not provide much opportunity to check "lip sync.")
3) Depending on app used to examine the "sample" file I downloaded, the audio sampling rate was at 16.0 or 32.0 KHz in either a mono or stereo VRB 64 Kbps target mode, and the video frame rate was not fixed/slow in unknown or Baseline L-3.1 profile. In short, there was inconsistent interpretation of the data content.
4) While AAC settings did appear to meet standards, this inconsistency in interpreting how the data is supposed to be played may be the source of problems.
5) Like the referenced forum poster above, I also tried re-sampling the audio to more Mac-like settings. (I my case, I resampled to 16-bit/48.0 KHz sampling rate at CBR 80 Kbps per channel using the QT 7 Pro MPEG-4 video "passthrough" option which I prefer to Apple's 41.4 KHz at 64 Kbps system default or the above forum poster's settings which are more consistent with MPEG-1 layered or AC3 stereo audio settings.) Unfortunately, it was impossible to tell if the baby chicks were in sync with the resulting audio or not.
In any event, since it appears unlikely that people having this problem will be posting a file for test by responders here, my recommendation would be to re-sample the the file using the explained VLC or QT passthrough option and post back regarding results and settings used.