[Swftools-common] Problem with swfcombine - asynchronous output

[jope]

Hi there,

I have two .swf files which I combine via

swfcombine  -T  foo.swf  bar.swf -o foobar.swf

The foo.swf is a converted .flv which is recorded via a Flash Media 
Server, which means it is using the NellyMoser codec for the sound.
The bar.swf has only sound in it and is not using the NellyMoser codec.

When I combine both files, the sounds of both files are asynchronous. 
This means, that the sound of the foo.swf starts a little bit later than 
the sound of the bar.swf. This is not the case if I start both .swf's at 
the same time separately.

Does this happen because of the NellyMoser codec? Or do I have to take 
note of something else?

Would be deeply grateful for any hint.

Thanks in advance

Joachim