ffmpeg -i compressed.swf out.avi
gives the error
[swf @ 0x10180b000]Compressed SWF format not supported
so I tried
swfcombine -d compressed.swf -o decompressed.swf
ffmpeg -i decompressed.swf out.avi
but I get the error
[swf @ 0x10180b000]Estimating duration from bitrate, this may be inaccurate
decompressed.swf: could not find codec parameters
Either a fix to the above process or different working CL utils would be appreciated!