thumbnails

[admin]

Maybe a stale cache? Try to untick Thumbs caching.

[Slavaon]

Maybe a stale cache? Try to untick Thumbs caching.

Tried it, and has switched to Windows. Does not help.
But if it more disturbs nobody, you can not correct this error. I still use version of XYplorer 15.70.0100 with a simple Drag and Drop.

[admin]

I would like to correct it, but to do that I have to reproduce it first.

[Nuno]

The same thing happens to me.

How I made it happen:
1. Rotate a portrait foto in XnView (it changed only a single byte in the jpg file - the exif orientation flag changed from 1 to 6 as the original photo had the subject head to the left instead of up)
2. Enabled auto rotate preview+thumbnails in XYplorer 16.00.0200
3. Thubnails appear with "right" aspect ratio, but incorrectly rotated and with some duplicated contents filling the frame
4. It only happens with thumbnail "high-speed" quality. The three others (fast, crisp, smooth) create perfect thumbnails.

[admin]

Send me the pic.

[Nuno]

Send me the pic.

Sent to xyplorer support email moments ago. Thanks.

[admin]

Thanks, got them, tested them: no problem at all.

[Nuno]

Thanks, got them, tested them: no problem at all.

Funny... I can reproduce the problem everytime.
I even disabled thumbnail caching and the problem remains... (But only with thumbnail "High Speed" setting, with the other alternatives everything is fine.)

I tried with a clean install of Xyplorer free and it still happens... and I think I may have found the problem...
Can you try again but this time using non-square thumbnails? (e.g.: 192x128 or 128x96)

[admin]

Square or non-square, it just works.

[Nuno]

Square or non-square, it just works.

Nevermind. I'll stick with "Fast" thumbnail generation...

[Nuno]

I would like to correct it, but to do that I have to reproduce it first.

I think I may have found a way to reproduce the problem.
Today I took some time trying this:

1. Use a VM (I used a IE11 on Win7 VM, under VirtualBox).
- Clean/fresh VM, no modification whatsoever;
- Downloaded free VM from Microsoft at https://dev.windows.com/en-us/microsoft ... s/windows/

2. Tested both XYplorer "no install" versions: latest free + latest trial (but non beta)
- Clean "install", without any settings modification (everything set at default);
- Same pictures I sent you before (only one byte different from each other: orientation flag 1<->6)

3. Result: the thumbnail of the original picture shows up sideways, as expected, but the thumbnail of the modified picture, which has the correct orientation EXIF flag set, shows somewhat distorted (the frame is rotated, with the right aspect ratio, but the picture inside is not rotated and "corrupted")

I hope you have the time and are able to reproduce the problem using this kind of setup.

[admin]

Tried with fresh version: no problems here.

[Nuno]

Tried with fresh version: no problems here.

I was hoping that a clean XYplorer install running inside a clean standard VM would help identify/isolate the problem I'm having...

I'm including an attachment of a screenshot of the XYplorer window, so that you can be sure I'm not seeing things...
(This was obtained from the latest beta of XYplorer I have installed, but inside the VM, as I mentioned before, the end result is exactly the same.)

[admin]

Might be a Win7 bug. I see no other explanation.

[Nuno]

Might be a Win7 bug. I see no other explanation.

Yes, I guess you're right! (Although it may be considered a Win7 bug or a limitation or a feature, depending on whom you ask... )

I tried installing the FastPictureViewer Codec Pack 3.8 Windows Add-In (32/64 bit) which claimed to enable jpeg+thumbnail auto rotation in Windows and everything was fixed. I also tested inside a Win10 VM and XYplorer worked perfectly.

I'm sorry to bother you with this, but I wasn't really aware that XYplorer was tapping into the underlying Windows thumbnail system.