Out of sync audio and video during FLV progressive download

[karma-lab]

I made a simple test video player using Flash MX 2004 Pro, and the MediaPlayer component. I encoded a 7 min video in iMovie HD, for fairly good quality (i.e. Best (2 pass), Medium bitrate (920kbit/s), 14.98 frame rate, keyframe Auto = 60, etc.) file size is about 56 mb.

When playing it with progressive download on the web, over my DSL (1500 kbit/s, for example), the audio is way ahead of the video, even though they start at the same time. It's literally 5 seconds ahead of the video. Is there anyway around this? I would prefer the audio to stutter, stop, wait for the video to catch up if it must, than have them completely out of sync - at least people might then wait for the whole thing to download and restart it.

I will mention that I am testing it at the moment on Mac OS 9.2.2, IE 5.1, Flash Player 7,0,19,0.

Any help appreciated!

[karma-lab]

BUMP...

Still having the same problem. New details:

I have an .flv file I created, of a 3.5 min movie.

When I play the Flash Video locally, using the NetConnection and NetStream classes, it works great.
When I do the exact same thing, except play it from my web site over the internet, the video is several seconds behind the audio. It still looks good, just completely out of sync. I'm buffering 10-15 seconds before even beginning playback.

Does this simply mean that the bandwidth is too high on the encoding? or some other kind of problem?

Oh, and: Mac OS X 10.3.9, .flv encoded with Sorenson Squeeze 4.1, testing with Safari.