XnView Software

i can't reproduce, settings>General>Rotate images... is checked, right?


Yes, and newer pictures are roteted correctly.
I would really like to show you the effect in an online meeting.

UPDATE:
I added the current DateTime to the EXIF-Information and now XnView always displays the images with ...

So it is correct after rebuilding?

Yes, but if I browse to another folder and back to this one, I have to rebuild again.
But it has nothing to do with the folder itself. When I move/copy the pictures in a completly new folder, it happens there too.
I removed the folder from the catalogue, but ...

the version with EXIF is correctly oriented, in landscape...

Interesting,
I don't see it in landscape in the thumbnails. I have to rebuild thumbnails to see it correctly.
In the preview window it's always shown in landscape.
So there is something wrong with settings. But witch one. Newer ...

It's normal, this file is portrait not landscape, there is no way to know the orientation
You are right for this picture.
However, I added the orientation Info in the other one and it is still shown in portrait until I rebuild thumbnails. When I change to a different folder and back to this ...

I'll try, but the files I have are too large. I don't know what happens If I reduce their size with XnViewMP too.

UPDATE:
I tried to resize one of the pictures to upload it. But after resizing it with XNViewMP the picture has EXIF-Information. After assigning orientation information to both files ...

Hello,

I have old files that have no EXIF-Information and are displayed in the wrong orientation. Therefor I added EXIF-Orientation with Exif Pilot.
Windows Explorer dsiplays the Images correct according the new EXIF-Information.

In XnViewMP the Images aren't displayed correctly! See Original.JPG ...

xnview wrote: Fri Nov 12, 2021 7:05 am batch convert & Save are not lossless, image datas are recompressed, but if you use 100% quality, there is no big loss

Wrong. I checked the Original picture with each version of the target picture with GIMP and THERE ARE NO PIXEL DIFFERENCES.
So they images are completley the same.

it's the way that lossless rotation works, encoded datas are not changed.
You can make lossless rotation by changing only the EXIF field

Why doesn't batch rotation or lossless rotation work like "open picture->save picture"? As I mentioned, this way is really lossless, it doesn't cut pixels and ...

Lossless rotation need that width is a multiple of 8, Batch convert re-compress image data


I understand, but why doesn't re-compress need a multiple of 8? Batch convert a landscape image with EXIF rotation info results in a 100% pixel-ident and 100% resolution-ident portrait image without EXIF ...

"batch convert -> action: rotate (EXIF Orientation)" is not lossless, only "JPEG lossless transformations"

Sorry, but that's wrong.

I tried JPEG lossless transformations and width changed from 2988 pixels to 2984 pixels. The remaining picture is 1:1 with the original
I also tried "batch convert ...

Do you means batch lossless transformations or batch convert?

Lossless transformation is the only rotation option, that is not lossless. It cuts Pixels on the border.
The other 3 rotation options (1: Save picture in picture window; 2: Batch transformation with rotation action; 3: export to JPG ...

xnview wrote: Tue Nov 09, 2021 11:16 am your original picture is perhaps not compressed at 100%

Hm, if the original picture isn't compressed at 100% but the target one is, shouldn't then the target file be much smaller instead of much larger?

right click on picture -> batch convert -> action: rotate (EXIF Orientation) -> output: Format (same as original); settings (JPEG: 100%; JPEG-XR: 100%; JPEG-XL: lossless compression)

Original picture: JPEG TrueColor (c1.1)

When I open a picture (jpg) with a rotation Info and just safe it (lossless settings) the filesize just changes to slightly smaller (Example: Original 4MB -> 3,62MB).
When I rotate the same picture in one direction and back, the size changes to 3,86MB.
When I start a batch job and set the editing to ...

Hello,

I have encountered a problem when saving images (.jpg) with rotation info:
When I open a folder with my pictures some of them are displayed in portrait according to their rotation info. I also see the small rotation symbol at the bottom of the thumbnail.
After I opened this picture and saved ...