XnView Software

https://en.wikipedia.org/wiki/AVIF

The AVIF specification, I believe.

Ghostscript 10.05.1 for Windows (64 bit)

When I try to scroll to the next PDF while viewing, it freezes on the second page. While it might be tempting to just dismiss this as a bug, I was wondering if anyone knows of a solution?

Dear Developers,
Regarding the data loss issue during JPEG-XL conversion, I believe two events are occurring:

1.Encoding Error: Rarely, the JPEG-XL encoding process does not complete normally, and the file is not generated (although the logs indicate that a 0-byte file was successfully generated ...

I tried encoding with 2000 images per thread for five sets, and 10000 images with four threads for one set.

I didn't encounter any particular issues. It was clearly faster for the 2000 images with one thread to finish the measurement compared to the 10000 images with four threads.

My hypothesis is ...

I haven't tested it yet, and I'm hesitant to because success would mean losing files. Debugging is time-consuming since it involves real-world operation. If we had preventative measures, it would be easier for others to take over when they encounter the same problem. With prevention in place, error ...

Yes. I am allocating 28 out of 32 threads.

This symptom only occurs during the encoding of jpg xl.
To my great dismay, the current situation is incredibly accidental. However, the reason I was somehow able to discover this is because once this symptom appears in a file folder, it continues to produce the same error for the remaining ...

We've had a development in this issue, and fortunately, we were able to capture the moment the bug occurred. Although we've experienced actual damage, the fact that the problem has become clear is a silver lining.


el.png


The relevant part of the log is as follows:
E:\～ ～\069.webp : 保存(save ...

I think probably the developer meant to ask me to verify if the same error occurs with the tgz archive, in order to isolate the problem.
Oh well, gotta put in the effort.

Correction in Measurements and Observations: Upon re-measuring, the file size for xnviewmp1.8.6(webp) should be 1,035,360 instead of 1,035,359. This confirms that xnviewmp1.8.6's lossless setting is fixed at -q 75.

To investigate further, I ran cwebp.exe with the parameters -lossless -m 6 -f 0 ...

Thank you for the information. I understand that a default quality of 75 is used during lossless compression.

Additional Test

----------------------------- buddicat.jpg---(byte)
-----------original-------|------179,093
xnviewmp1.8.6(webp)|----1,035,359
cwebp.exe(-q 75)------|----1,035,360

Could ...

Sorry about that. Resending it now.

Required Tools:
The latest version of xnviewmp

xnviewmp 1.5.5 (the xnviewmp.exe file from version 1.5.5 is required)

cwebp.exe (libwebp 1.4.0)

Setup:
Rename xnviewmp.exe from version 1.5.5 to 1.5.5.exe and drop it into the folder of the latest xnviewmp installation.

Configure the batch ...

The expectation was that combining a compression level of -e 6 or higher with the --brotli_effort= option would provide a balanced improvement in both compression speed and ratio. However, after re-measurement due to a discovered error, the improvement was only in the range of kilobytes.

Instead ...