Has this problem been resolved? I'm seeing this exact problem of audio sync. I have a very simple configuration, one video stream 1280x720 and one audio stream. I'll send a log file when I make my next test. Basically, I can make the adjustment for good synchornization (about 1300ms) but then when I run it again it is out of sync by close to 1 second. I saw a change a few years ago to allow out of sync adjustments to be more than 1 second.