List of issues
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#1167 Second parameter after -replace has to be a local file
Replace in and swf and set the 2nd param after -replace to something with "\" and wont work, probably an escape issue with \.
Which OS? When you create a bug report, please answer to the questions in the template, do not delete it. I tried this on Windows, and it works: ffdec.bat -replace C:\FFDec\7.1.1\as2.swf C:\FFDec\7.1.1\as2_2.swf 10 310.png