[MEncoder-users] mp4 audio slipping when played back in Quicktime

[Nicolas Hesler]

I've successfully created an MP4 with mencoder using the following command line.  The file plays back normally using VLC but when played back in Quicktime, the audio slips by a couple of frames after about a minute. Any idea why this might be happening and how I might be change my command line options to make Quicktime happy?   

Note: I'm frameserving from Premiere and so my source should not inherently have a sync issue. (or so i assume)
and my video source is only about a minute long, so the slippage is noticeable by the end of the video.

mencoder -of lavf -sws 9 -lavfopts format=mp4 -vf dsize=1280:720:0,scale=0:0,expand=1280:720,harddup -ovc x264 -x264encopts bitrate=5000:qcomp=0.7:qp_min=1:direct_pred=auto:keyint=48:partitions=all:me=umh:subq=7:frameref=8:trellis=2:global_header:pass=1:psnr -oac faac -faacopts mpeg=4:object=2:br=224:raw -channels 2 -srate 48000