[magick-users] Animated PNGs
glennrp at comcast.net
Tue Sep 23 10:53:54 PDT 2003
At 04:51 PM 1/2/70 +1000, Daniel Freeman wrote:
>I expect that the PNG format can support animation?
Yes. The file extension is .mng instead of .png and the
signature bytes are different.
>(frame by frame -
>although I notice that Fireworks can't export such a file)
>Does a typical web browser enable you to display an animated PNG?
No. Mozilla did up until June of this year but then they removed
>If so, how do I create an animated PNG using PerlMagick?
ImageMagick supports MNG:
Using the commandline interface, it's
convert *.png output.mng
convert animation.gif animation.mng
You can figure out how to map that over to PerlMagick.
>I'm trying to get around the LZW patent by using something else (yes, I
>know I could compile ImageMagick/PerlMagick with LZW enabled - but I
>doubt whether I could convince my web host to do this)
>When does that damned patent run out (in the rest of the world) anyway?
The last one expires July 7 2004 (Canada) although it is probably not
enforceable there after June 20 2004 (one year after the US patent expires).
I am not a patent lawyer...
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