Hi all
Replies to Peter and Roger here.
Peter Chub suggested: Try copying the problematic files to a different filesystem and
running your rotate again.
Have done so on a different laptop and exactly the same. What I do notice though on
both is that the slow rotate images also take **longer** to load. The -monitor
options shows 'Loading', 'Rotating' and 'Saving'.
Two files of roughly the same size ~435k
One takes 30 seconds for Load, rotate, save. (6500 x 9000)
The other 4 hours. (15000 x 9000)
Roger Barnes wrote:
Have you tried using the -limit option to give imagemagick more room to
play?
Snipped from the docs:
-limit <type> <value>
Area, Disk, File, Map, or Memory resource limit
Yes. In fact '-list resource' will show what is available and it says 2G.
I tried though '-limit memory 2000 mb' as you suggested just in case and that runs
just as slow.
Alternatively, for images that big, you might get more mileage out of an
alternative called VIPS, for which there is a front-end called nip2.
http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS
Looks interesting. Will add it to the checklist to look at.
Mike
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