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IDProjectCategoryView StatusDate SubmittedLast Update
0002672Piwigoimage processingpublic2012.06.30 00:202012.07.02 13:54
Assigned Torvelices 
PrioritynormalSeverityminorReproducibilityhave not tried
PlatformOSOS Version
Product Version2.4.0 
Target Version2.4.1Fixed in Version2.4.1 
Summary0002672: [ImageMagick] invalid option sampling-factor for old versions of ImageMagick
DescriptionThe sampling factor does not work on old versions of ImageMagick, for example 6.2.8 which is still used by many hosting providers (it is the version provided in Debian Etch, current stable - 2)

I propose to comment this option for now, but in the future to be able to detect the ImageMagick version and activate this option only if version > X (I don't which version is X)
TagsNo tags attached.
Database engine and version
PHP version
Web serverApache 1.3.x
Attached Files

- Relationships

-  Notes
svn (reporter)
2012.06.30 00:23

[Subversion] r16210 by plg on branch 2.4

-----[Subversion commit log]----------------------------------------------------
bug 2672: deactivate sampling-factor (for now)
svn (reporter)
2012.06.30 00:24

[Subversion] r16211 by plg on trunk

-----[Subversion commit log]----------------------------------------------------
merge r16210 from branch 2.4 to trunk

bug 2672: deactivate sampling-factor (for now)

rvelices (developer)
2012.06.30 06:29

if I read the code correctly, when using est imagick, we always call is_ext_imagick() and we launch convert -version
we could save the return value ...
plg (manager)
2012.06.30 09:55

Yes I agree rvelices, we know the way to retrive the version of "convert". For Piwigo 2.4.1, I would like to increase stability first.

I we store the EXTIM_VERSION in $conf we have to make sure we refresh it very often, in case the user upgrades IM. Maybe it would be better to simply store it in $_SESSION.

We also need to know which version X supports sampling-factor (I don't know).

Then we should only use this option if we know the version and if the version is superior to X.

If you think we can do that we 100% reliability, OK for 2.4.1. Else I prefer to keep it for 2.4.2, when we'll have less problems related to image processing.
plg (manager)
2012.06.30 09:57

Another easy solution is to add in include/config_defaults:

$conf['imagemagick_sampling'] = false;
svn (reporter)
2012.06.30 21:23

[Subversion] r16230 by rvelices on trunk

-----[Subversion commit log]----------------------------------------------------
bug 2672: invalid option sampling-factor for old versions of ImageMagick (use it for new versions)
rvelices (developer)
2012.06.30 21:25

plg, ok with my commit ? (no need for session or config. I took 6.6 as a version because it works with 6.6.0-4)
plg (manager)
2012.06.30 21:54

I've just made a test with convert 6.3.7 and 6.5.7-8 and it also works.

Your test seems very good!

(and I made a visual test with/without sampling-factor and I don't see any difference in quality, but size is indeed lighter)
svn (reporter)
2012.07.01 06:18

[Subversion] r16242 by rvelices on branch 2.4

-----[Subversion commit log]----------------------------------------------------
bug 2672: invalid option sampling-factor for old versions of ImageMagick (use it for new versions) merge from trunk to branch 2.4

- Issue History
Date Modified Username Field Change
2012.06.30 00:20 plg New Issue
2012.06.30 00:20 plg Status new => assigned
2012.06.30 00:20 plg Assigned To => plg
2012.06.30 00:20 plg browser => any
2012.06.30 00:20 plg Web server => Apache 1.3.x
2012.06.30 00:23 svn Checkin
2012.06.30 00:23 svn Note Added: 0006397
2012.06.30 00:24 svn Checkin
2012.06.30 00:24 svn Note Added: 0006398
2012.06.30 06:29 rvelices Note Added: 0006399
2012.06.30 09:55 plg Note Added: 0006400
2012.06.30 09:57 plg Note Added: 0006401
2012.06.30 21:23 svn Checkin
2012.06.30 21:23 svn Note Added: 0006402
2012.06.30 21:25 rvelices Note Added: 0006403
2012.06.30 21:54 plg Note Added: 0006404
2012.07.01 06:18 svn Checkin
2012.07.01 06:18 svn Note Added: 0006405
2012.07.02 13:54 plg Assigned To plg => rvelices
2012.07.02 13:54 plg Status assigned => closed
2012.07.02 13:54 plg Resolution open => fixed
2012.07.02 13:54 plg Fixed in Version => 2.4.1

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