XnView Software

> If I understood it correctly pngout.exe additionally switches to the smallest
> possible palette if the picture uses at most 256 colours

many PNG optimizers do this ... PNGOUT additionally rersorts/messes-up the palette (???) and optimizes the Deflate compression, but it doesn't brute-force ...

When editing a large image with XN, it happens that the image simply disappears, and XN saves it as a 0 pixel by 0 pixel file. The original file is lost. Most likely this is due to running out of memory. If you cut several small pieces from the big image (doesn't need extra memory - except for undo ...

"Xbmf.dll"

1. Make sure the existing XN version is NOT running.
2. Make sure no other program blocks this file (virii/antivirii)
3. Delete the old installation manually directory "XnView" or "PlugIns" at least
4. Use the ZIP

Delete "HKEY_CLASSES_ROOT\.tiff" and "HKEY_CLASSES_ROOT\.tif" in REGEDIT and reboot. Tested on ME only.

Should be fixed now since NC 6.50 / XN 2.10 :

http://newsgroup.xnview.com/viewtopic.p ... 85#p115480

(not yet tested)
"-high_res" is gone

> Can the pngout addon be updated to current version?

Bundling PNGOUT with XN is legally problematic. Solution (but needs work): include PNGZopfli code into LIB + NC + XN

> I'm having the exactly the same problem right now... Did you solve it, alexgieg?

I never had this problem, but there is a splendid solution: download the ZIP http://www.xnview.com/en/xnview/#downloads

could you send me samples?

Unfortunately the "samples" are highly private and sensitive and thus not redistributable ... but I had already investigated the BUG finding out that the element ($88,$0200) is source of the problem. Also, I have for now no easy way to sufficiently anonymize the samples ...

When I rotate an image, the size is by about 4x as large, i.e. a 1.25MB image increases to about 5.5MB

1. Used "ordinary rotate" and resaved, rather than lossless JPG rotate ?
2. JPG ?

> How come?

Expected effect. The new JPG was saved with a higher quality setting than the original (bad idea ...

jpeni wrote:I am trying to batch convert a collection of black symbols in .PNG (32bit RGB) images.

What am I doing wrong?

Please upload the original Corpus Delicti in PNG format. Let me guess that it has more than 1 black colour?

> That error means "Access denied"

possible reasons:

1. XNVIEW is running
2. file has the "R" attribute set
3. old or new file is blocked by some stupid process (so-called antii-virii ... )

BTW, you can download the ZIP and manually replace just this ONE file

Idea: Add an option to NC and XN to pick the stored preview image instead of the main one (JPG, DICOM, ...).

See also:

http://newsgroup.xnview.com/viewtopic.php?t=28547 "DICOM BUG ($88,$0200) preview"
http://newsgroup.xnview.com/viewtopic.php?t=28339 "Why is "-high_res" needed for RAW?"

This won ...

Problems with DICOM in NC 6.17 (there is no latest, and most of it affects XNview too):

- If DICOM file contains a preview image (element ($88,$0200) SQ), NC takes only this one, instead of the main image. I can "fix" it by "patching away" the "evil" element. Solution: skip this element when ...

jimoe wrote:Why would NConvert choose the half size by default?

Funny ... I also had noticed this BUG

Do you use one of this OS?

YES

VC 6 is very old now

YES

If i use VS 2008-2012, the build can't be used on 9

Probably true ... but what's the point of VS >= 2008 ? Correct me if I'm wrong, but AFAIK the newer VS's / MSVC's cause nothing except trouble (bloat, dependencies of strange DLL's ...