XnView Software

XnView: MP 0.99.7
OS: Mac Monterey 12.1, running on M1 MacBook Pro with Rosetta

I received a warning that an image will be converted to 8 bit RGB when loading a larger 16 bit TIFF image. However, the display is just a gray checkerboard pattern. Image is a snapshot from an IP camera. Properties on the checkboard seem to report size, filetype, etc accurately. Image opens in Preview and other graphics programs.

The bug also occurred in 0.99.6 before I made sure I was up to date.

Effect: Cannot see or work with the image.

To reproduce:
1. Open Image file by double. (I am happy to supply it, but it is 150MB and can't be attached here).
2. Dismiss warning prompt.
3. The checkerboard will be there

Actual behavior (bug): can't convert or display 16-bit TIFF.

Expected behavior: should convert to 8 bit and display correctly.

(Image too large to attach)

could you send me a sample file?

Replied by PM with a link to image.

Thanks to your detailed description I can reproduce the problem.

This problem is supposed to be fixed in XnView MP 1.00 beta. Please check and confirm the bug fix here.

I was checking the bug re 16 bit TIFF files, and opened the test file I had sent.

I then opened a new one from the same camera opened correctly and appeared to be 16 bit. (This step was not necessary to reproduce the crash)

I checked the info "I". (This step was not necessary to reproduce the crash)

Then went to the "Save as" in the menu and xnview 1.0 beta crashed as soon as I selected it. Save did not produce a crash, but Save Selection did.

Reproduced--the bug reports, however, fail to send. So it opens, but does not save as.

tcrXNV wrote: Tue Mar 29, 2022 4:28 am Reproduced--the bug reports, however, fail to send. So it opens, but does not save as.

Are you able to reproduce each time? You open the tif, 'save selection' and once filename selected you have the crash?
Windows? The same if you have only one file in the folder?