Force users to upload images with a given ratio

Question

Maybe it is something simple. Is there any way to force users to upload images only with a given ratio - e.g. 16:9? (Joomla 3)

thx

Uploading them using what? Joomla's media manager? A 3rd party extension? Yes, it would be possible, but it would mean having to develop a plugin to override the upload function — Lodder, Commented Oct 20, 2015 at 9:27
Technically, if you want to check the ratio before uploading you have to use javascript FileReader to Canvas, read dimensions and then if they check out enable the actual upload. stackoverflow.com/a/13939150 — Ville Niemi, Commented Oct 20, 2015 at 10:35
Since that only requires javascript, you could do it with anything that can add javascript to specific pages, plugins, modules, template edits... — Ville Niemi, Commented Oct 20, 2015 at 10:37
Have you tried any 3rd party components? I know there are some that offer this functionality. — jonboy, Commented Oct 20, 2015 at 12:16
I use JCE Editor. Users can upload images using this editor. I thought there may be a global setting in Joomla 3 configuration that would allow me to restrict all images to have the given ratio (16:9). Is there any extension that would allow me to do that? Can I do it with JCE Editor (so that I don't need to install anything else)? If possible I'd like to make it globally so that even editors are restricted (from backend) but JCE Editor (frontend) is a must. — aretai, Commented Oct 20, 2015 at 20:43

Max · Accepted Answer · 2015-10-20 13:21:12Z

2

You can maybe "cosider" some users dont have the image In this ratio.

You can use JCE editor with plugin image manager extended to possibility user crop his image in this ratio.

answered Oct 20, 2015 at 13:21

Max

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thank you for information. What I'd like is to make the manipulate image (e.g. crop) to this ratio or display message to user to upload in given dimension (bit harder for users). I've also found a setting in JCE Editor - in the image section that is for adding some css and styles - maybe it would be possible to tweak it so that to fit my need
– aretai
Commented Oct 20, 2015 at 20:45
Some image galleries can be configured to convert uploaded images to specific ratio. But I don't know of any that really integrates well with articles. Blog components like EasyBlog have restricted editors with restricted image upload capability. JCE Media Manager extended allows user to change size on upload but I do not know of setting to force that.
– Ville Niemi
Commented Oct 20, 2015 at 22:33

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