Legacy ImageMagick Discussions Archive

-page A4 is equivelent to -page 595x842 which is for the default -density72

for -density 300 use something like -page 2480x3508 (pixels in A4 at 300dpi)

If I do that and then try to convert to an animated GIF it just fails in the same way, with the GIF being frozen on the first frame.

This ...

You can use -density for the read. Then use +density afterward to remove it.

Though I still don't understand how density could effect GIF output, except perhaps that larger images equal more colors.

GIF was never designed with large images in mind. It was for small 'cartoon' like images with ...

mogrify -format png -page A4 -trim -rotate "90<" image.ps

There may be just a typo here, but I don't see any gif involved and png does not support multi-frame images such as animations. Or perhaps I have just lost context in this thread.

Maybe I didn't explain it properly.

multi-page ...

anthony wrote:That is strange as GIF format ignores density completely!

Is there a simpler way to make the single files I'm producing from the PostScript file larger than the default low-res ones that come out if I omit "-density"?

Thanks, after narrowing it down a bit it seems that if i omit the density keyword then the animated gif is produced fine.

e.g.

mogrify -format png -page A4 -trim -rotate "90<" image.ps


If i put the density keyword in, it now fails to produce the animated gif and instead the result is just ...

I currently convert a multi-page postscript file into a series of PNG images using:


mogrify -format png -page A4 -trim -density 300 -rotate "90<" image.ps


I then use Photoshop to assemble the PNG images into an animated GIF but I was hoping to use ImageMagick to do this instead.

I tried the ...