How do you specify Actionscript version in SWFC?

I know SWFC supports both ActionScript 2.0 and ActionScript 3.0. But how do I specify which version a specific file is using?

Use the swfc version statement:

.flash filename="box.swf"
  .version 7
.end

References

• swftools : Xenial (16.04) : Ubuntu

• Warblefly/MultimediaTools-mingw-w64: Scripts and patches to compile many multimedia utilities, including FFmpeg, with mingw-w64 for 64-bit Windows