Re: [Swftools-common] Problem with swfcombine - asynchronous output

[Matthias Kramm]

On Tue, Jun 26, 2007 at 11:32:06PM +0200, jope wrote:
> 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?

Probably the two SWFs have different framerates. Sound is synchronized
to the framerate, so when the rate changes, it will be out of sync.

There's not much you can do here, except fixing the framerate of one
of the files so that it matches with the framerate of the other file.
(E.g. wav2swf allows you to create a sound SWF with a specific
framerate)

Greetings

Matthias