Re: [Swftools-common] Cannot extract wav file from swf

[Daniel Arteaga]

Hi Chris,

[...]

> Dan,
>
> swfdump -D ens_ab.swf
>
> gives,
>
> [HEADER]        File version: 8
> [HEADER]        File is zlib compressed. Ratio: 91%
> [HEADER]        File size: 9216464
> [HEADER]        Frame rate: 12.000000
> [HEADER]        Frame count: 1
> [HEADER]        Movie width: 1000.00
> [HEADER]        Movie height: 600.00
> [045]         4 FILEATTRIBUTES
> [009]         3 SETBACKGROUNDCOLOR (ff/ff/ff)
> [018]        31 PROTECT
> [00e]   9216259 DEFINESOUND defines id 0001 (Raw little-endian 44Khz 16Bit 
> stereo)
> [038]        15 EXPORTASSETS
>                  exports 0001 as "ens_AB.wav"
> [02d]         4 SOUNDSTREAMHEAD2
> [00c]        97 DOACTION
>                   (   47 bytes) action: Constantpool(5 entries) String:"soundDatei" String:"this" 
> String:"Sound" String:"ens_AB.wav" String:"attachSound"
>                   (    4 bytes) action: Push Lookup:0 ("soundDatei") Lookup:1 
> ("this")
>                   (    0 bytes) action: GetVariable
>                   (    7 bytes) action: Push int:1 Lookup:2 ("Sound")
>                   (    0 bytes) action: NewObject
>                   (    0 bytes) action: DefineLocal
>                   (    9 bytes) action: Push Lookup:3 ("ens_AB.wav") int:1 Lookup:1 
> ("this")
>                   (    0 bytes) action: GetVariable
>                   (    2 bytes) action: Push Lookup:0 ("soundDatei")
>                   (    0 bytes) action: GetMember
>                   (    2 bytes) action: Push Lookup:4 ("attachSound")
>                   (    0 bytes) action: CallMethod
>                   (    0 bytes) action: Pop
>                   (    0 bytes) action: End
> [001]         0 SHOWFRAME 1 (00:00:00,000)
> [000]         0 END
>
> and,
>
> swfextract ens_ab.swf
>
> Objects in file ens_ab.swf:
>   [-s] 1 Sound: ID(s) 1
>   [-f] 1 Frame: ID(s) 0
>   [-m] 1 MP3 Soundstream
>
>
> You can't extract the MP3 Soundstream - it's something that isn't yet in the 
> file, and thus has no ID.
>
>    swfextract -s 1 -o sound.wav ens_ab.swf
>
> should pull the wave file from the swf. BUT it doesn't.  You're right, there
> is no visible error message to the command line, and no file written out.
> Same result using swfextract from 0.9.1 and from 0.9.2.  Quite what that
> reason is, I have no clue.  Maybe a corrupted file?  How was the original swf 
> file compiled?

I don't know how it was compiled. The swf file comes from 
http://www.schoeps.de/showroom/. I wanted to extract a couple of wav 
files to use them for demonstration purposes in an university lecture.

> > Using an alternative tool, I managed to extract ens_AB.wav.  All 52 seconds
> of the wind sample seem fine.

This alternative tool you mention, is it a freely available tool? If 
this is the case, could you point me towards it?

> As a further experiment, I re-embedded it into another swf using swfc, made
> sure it played back, then extracted it out again using swfextract -s.   No 
> issues whatsoever.  If you wish me to post my resulting swf so you can check it 
> also, then let me know.

I am more interested in the final wav file, thanks. I would need to 
extract three wav files from three corresponding swf files

Thank you very much for your help!

Daniel