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#1 2012-05-11 17:04:33

Tadjio
Member
Location: UK
Registered: 2012-05-02
Posts: 241

[resolved] Image conversion from 2.3 to 2.4

Please forgive me if my understanding of Piwigo is faulty :-)
In v2.3 I understand that potentially two copies of an image are held - lets call them lo-res and hi-res.
v2.3 always holds a lo-res copy which is typlically resized down to fit the screen. Flash uploader uses 800 wide.
The hi-res or HD copy is optional and if present is displayed on a separate screen and can be downloaded.

In v2.4, with multisizing, only one copy is held.  Am I right?

When upgrading from 2.3 to 2.4, what is the process if 2.3 has a lo-res and a hi-res copy?  Which is kept?

I am about to load many images into piwigo.com (2.3) and hope to upgrade them to 2.4 soon after so I want to understand the process before I start.

In particular, am I right in choosing an image size slightly larger than the largest user scren, say max 1620x1080?
I will only upload true hi-res images when they are worth it, to save on bandwidth!

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#2 2012-05-11 17:42:22

mistic100
Piwigo Team
Location: Avignon (Fr)
Registered: 2008-09-27
Posts: 1449
Website

Re: [resolved] Image conversion from 2.3 to 2.4

obviously the hi-res (if present) file is kept as "original" on 2.4, if not the low-res is used as original

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#3 2012-05-11 17:47:15

Tadjio
Member
Location: UK
Registered: 2012-05-02
Posts: 241

Re: [resolved] Image conversion from 2.3 to 2.4

mistic100 wrote:

obviously the hi-res (if present) file is kept as "original" on 2.4, if not the low-res is used as original

Thanks for confirming that.  It was only yesterday that I discovered that 2.4 only keeps one copy!

So if someone has a 4000 pixel wide image, that is what gets retrieved everytime?
All those MBs :-(

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#4 2012-05-11 18:06:32

mistic100
Piwigo Team
Location: Avignon (Fr)
Registered: 2008-09-27
Posts: 1449
Website

Re: [resolved] Image conversion from 2.3 to 2.4

no there is a complex cache system which generates needed dimensions

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#5 2012-05-11 18:19:37

Tadjio
Member
Location: UK
Registered: 2012-05-02
Posts: 241

Re: [resolved] Image conversion from 2.3 to 2.4

mistic100 wrote:

no there is a complex cache system which generates needed dimensions

Go on...
If it's complex that's why I haven't penetrated it yet.

Say we have an original Canon JPG like mine recently of 5184x3456 pixels and 12.5Mb, talk me through what happens when someone clicks on the Thumbnail SVP?

Last edited by Tadjio (2012-05-11 18:22:15)

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#6 2012-05-11 18:33:15

mistic100
Piwigo Team
Location: Avignon (Fr)
Registered: 2008-09-27
Posts: 1449
Website

Re: [resolved] Image conversion from 2.3 to 2.4

if the thumbnail is not cached it's generated from the hi-res picture, if it's cached it's loaded from the cache folder, this is done for all dimensions available

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#7 2012-05-11 19:53:50

Tadjio
Member
Location: UK
Registered: 2012-05-02
Posts: 241

Re: [resolved] Image conversion from 2.3 to 2.4

mistic100 wrote:

if the thumbnail is not cached it's generated from the hi-res picture, if it's cached it's loaded from the cache folder, this is done for all dimensions available

Ca va bien

I uploaded a 10Mb image using Flash Uploader to v2.4 and it took about 3 minutes.
When I viewed the Original in v2.4 it opened a new Internet Explorer Window/Tab and filled it in abut 20 seconds after which it resized to fit the window. You can then zoom in and out.

I then did a right-click "Save picture as..." and it saved in seconds.
My only complaint is that I would like it to retain the Original File Name, not the internal Piwigo one :-(

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#8 2012-05-11 20:44:30

plg
Piwigo Team
Location: Paris, France, Europe
Registered: 2002-04-05
Posts: 11717
Website

Re: [resolved] Image conversion from 2.3 to 2.4

Tadjio wrote:

When I viewed the Original in v2.4 it opened a new Internet Explorer Window/Tab and filled it in abut 20 seconds after which it resized to fit the window. You can then zoom in and out.

Yes, this is the expected behavior when you click on "Original" in the size selection box.

In my opinion, I'm not sure that displaying a "big" original this way is the best thing to do.

Tadjio wrote:

I then did a right-click "Save picture as..." and it saved in seconds.
My only complaint is that I would like it to retain the Original File Name, not the internal Piwigo one :-(

Use the floppy disk icon instead.


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