Large multi-tiff files

[Andrea Parenti]

Dear magick-users,

I have a question about writing multi-tiff files using the MagickWand
interface. My understanding is that I have to:

- initialize everything ie (MagickWandGenesis(), wand=NewMagickWand())
- add the images to the wand: MagickConstituteImage(wand, ...)
- write the file: MagickWriteImages(wand, ...)

This is indeed working, but I get into trouble when I try to write a
large number of large images to a single file: all images are first stored
in memory (wand), then written to a file, and memory occupation starts to
grow. Is there any solution to this?

Thank you very much!

Regards,
Andrea Parenti


------------------------------------------------------------
Dr. Andrea Parenti DESY (FS-EC Group)

mail: ***@desy.de Notkestrasse 85
web: http://www.desy.de/~parenti/ D-22607 Hamburg
phone: [phone] Germany
------------------------------------------------------------

[d***@imagemagick.org]

and memory occupation starts to grow.

Use MagickSetResourceLimit(). Set your memory limit to 1GB and anything
more than that will be cached to disk instead of memory.

[Anthony Thyssen]

On Tue, 8 Nov 2011 17:22:17 +0100 (CET)
Andrea Parenti <***@desy.de> wrote:
| Dear magick-users,
|
| I have a question about writing multi-tiff files using the MagickWand
| interface. My understanding is that I have to:
|
| - initialize everything ie (MagickWandGenesis(), wand=NewMagickWand())
| - add the images to the wand: MagickConstituteImage(wand, ...)
| - write the file: MagickWriteImages(wand, ...)
|
| This is indeed working, but I get into trouble when I try to write a
| large number of large images to a single file: all images are first stored
| in memory (wand), then written to a file, and memory occupation starts to
| grow. Is there any solution to this?
|
| Thank you very much!
|
| Regards,
| Andrea Parenti
|
What file format? Some file formats allow you to simply concatenate images
together to create a multi-image file.


Best idea is to post your question on the IM discussion forums
This has more users, and answers remain available for others to use.
http://www.imagemagick.org/discourse-server/index.php

Anthony Thyssen ( System Programmer ) <***@griffith.edu.au>
--------------------------------------------------------------------------
"Happy surfing to all, and to all a good byte!"
--- A Network Christmas Story -- Hugh Drumm & Vincent Ambrose
--------------------------------------------------------------------------
Anthony's Castle http://www.ict.griffith.edu.au/anthony/

[Andrea Parenti]

Post by Anthony Thyssen
On Tue, 8 Nov 2011 17:22:17 +0100 (CET)
| Dear magick-users,
|
| I have a question about writing multi-tiff files using the MagickWand
|
| - initialize everything ie (MagickWandGenesis(), wand=NewMagickWand())
| - add the images to the wand: MagickConstituteImage(wand, ...)
| - write the file: MagickWriteImages(wand, ...)
|
| This is indeed working, but I get into trouble when I try to write a
| large number of large images to a single file: all images are first stored
| in memory (wand), then written to a file, and memory occupation starts to
| grow. Is there any solution to this?
|
| Thank you very much!
|
| Regards,
| Andrea Parenti
|
What file format? Some file formats allow you to simply concatenate images
together to create a multi-image file.
Best idea is to post your question on the IM discussion forums
This has more users, and answers remain available for others to use.
http://www.imagemagick.org/discourse-server/index.php
--------------------------------------------------------------------------
"Happy surfing to all, and to all a good byte!"
--- A Network Christmas Story -- Hugh Drumm & Vincent Ambrose
--------------------------------------------------------------------------
Anthony's Castle http://www.ict.griffith.edu.au/anthony/

The file format is tiff. I don't think two single-page tiff files can be
just concatenated to have a two-page tiff file. Am I wrong?

Andrea

[Fred Weinhaus]

Unless there is something odd about you tiff files, this should work fine

convert rose: rose.tiff
convert rose.tiff rose.tiff rose2.tiff
identify rose2.tiff
rose2.tiff[0] TIFF 70x46 70x46+0+0 8-bit DirectClass 19.9KB 0.000u 0:00.000
rose2.tiff[1] TIFF 70x46 70x46+0+0 8-bit DirectClass 19.9KB 0.000u 0:00.019

result shows two frames/layers

Post by Andrea Parenti
The file format is tiff. I don't think two single-page tiff files can be
just concatenated to have a two-page tiff file. Am I wrong?