Grab sound/audio from swf-movie

[tobbemannen]

Hello.

I'm building my own flash to video converter. And I have a bit of a problem with the sound.
I have tried different approaches, first by creating an avi-file with the video and then afterwards adding the sound. The latest approach has been to save the video and audio into two different files as raw data, and then used ffmpeg to make the avi.
But I always get same result that the sound is lagging behind the video.
I used ffmpeg on the raw datafiles and found out that the sound file is a few second longer.

I have seen a flashconverter that converts the movie without playing the sound. But I don't how that program does it.

Can anyone help me with my problem? And maybe also explain to me why the sound is longer then the movie.
Is there any possibility to extract just the sound from a flashmovie?

Thanks
Torbjörn

 

[kennethkawamoto]

Can't FFmpeg just convert SWF into AVI, video and audio together?

Kenneth Kawamoto

http://www.materiaprima.co.uk

 

[tobbemannen]

No it can't.
I have to go through Macromedias Activex to get the best result.

/Torbjörn