[Swftools-common] jpegdpi and ppmsubpixels obsolete in version 9

[Víctor Hugo]

jpegdpi and ppmsubpixels obsolete in version 9

Hi all.
I usually used jpegdpi and ppmsubpixels to set 72 pixels but in 9 
version this disappear, anyone know what parameter can I set to reduce 
my images to 72 pixels?

Thanks for your time.
V.H.