I want to load and resave all PNG files on my disk to the same location and
file name. Can anybody advise me how to accomplish this using freeware?

Reason: many of my PNG files were created using an earlier version of
Irfanview, and there was some sort of bug causing thumbnails and viewers to
display the PNG images incorrectly - it looks like a scrambled TV signal.
The problem is fixed if the PNG files are loaded and resaved using a newer
version of Irfanview.

Just tried to accomplish this using the batch convert functions of Irfanview
and Xnview. Both programs choked - "not responding".

Have downloaded ImageMagick, also have Nconvert utility that comes with
Xnview ... but the syntax is very detailed and complex.

"spoon2001" <(E-Mail Removed)> wrote in message
news:Y6G0f.8966$(E-Mail Removed)...
> I want to load and resave all PNG files on my disk to the same
location and
> file name. Can anybody advise me how to accomplish this using
freeware?
>
> Reason: many of my PNG files were created using an earlier
version of
> Irfanview, and there was some sort of bug causing thumbnails
and viewers to
> display the PNG images incorrectly - it looks like a scrambled
TV signal.
> The problem is fixed if the PNG files are loaded and resaved
using a newer
> version of Irfanview.
>
> Just tried to accomplish this using the batch convert functions
of Irfanview
> and Xnview. Both programs choked - "not responding".

Try with Irfanview again but only load a "reasonable" amount of
files at a time. This should work although it will take a little
longer.

nobody wrote:
> "spoon2001" <(E-Mail Removed)> wrote in message
> news:Y6G0f.8966$(E-Mail Removed)...
>> I want to load and resave all PNG files on my disk to the same
>> location and file name. Can anybody advise me how to accomplish
>> this using freeware?
>>
>> Reason: many of my PNG files were created using an earlier version of
>> Irfanview, and there was some sort of bug causing thumbnails and
>> viewers to display the PNG images incorrectly - it looks like a
>> scrambled TV signal. The problem is fixed if the PNG files are
>> loaded and resaved using a newer version of Irfanview.
>>
>> Just tried to accomplish this using the batch convert functions of
>> Irfanview and Xnview. Both programs choked - "not responding".
>
> Try with Irfanview again but only load a "reasonable" amount of
> files at a time. This should work although it will take a little
> longer.

Nope, that doesn't do the job ... even though Irfanview will recurse the
directory tree for input files - e.g.

c:\data\pics\
c:\data\pics\level1
c:\data\pics\level1\level2

.... it won't put output files in the same locations as the input files ...
it wants to put all of the output files into a single directory ... e.g.

c:\data\pics

That spells disaster!

Luckily I was watching and clicked the STOP button before too much damage
was done.

Arrgh.

I used to have a little DOS utility that would recurse the directory tree
and run the same command-line on each directory in the tree. That would
work here, I think, together with an Irfanview /convert command-line option.

On Wed, 05 Oct 2005 16:25:04 GMT, spoon2001 wrote:

>> Try with Irfanview again but only load a "reasonable" amount of
>> files at a time. This should work although it will take a little
>> longer.
>
> Nope, that doesn't do the job ... even though Irfanview will recurse the
> directory tree for input files - e.g.
[...]
> ... it won't put output files in the same locations as the input files ...
> it wants to put all of the output files into a single directory ... e.g.

You could run:

i_view32.exe sample.png /convert=sample.png

I have no defect *.png files to test. But if I try it on *.jpg the file
size changes. (Using my default setting of compression quality, if I'm
not mistaken.) So it might rewrite *.png files, too.

If the above succeeds, you can run a command like this (if you're on
Win2k or WinXP):

cmd /c for /R D:\Picts %i in (*.png) do C:\IView\i_view32 %i /convert=%i

The above assumes IrfanView is inside the C:\IView folder and the *.png
files can be found within the D:\Picts folder (and its subfolders). It
should rewrite any *.png file found. Don't use too deeply nested folders.
Else you'll encounter problems with the command line buffer size.

> I used to have a little DOS utility that would recurse the directory tree
> and run the same command-line on each directory in the tree. That would
> work here, I think, together with an Irfanview /convert command-line option.

Maybe <Locate> by Charles Dye:

http://www.highfiber.com/~raster/freeware.htm

BeAr
--
===========================================================================
= What do you mean with: "Perfection is always an illusion"? =
===============================================================--(Oops!)===

B. R. 'BeAr' Ederson wrote:
> You could run:
>
> i_view32.exe sample.png /convert=sample.png
>
> I have no defect *.png files to test. But if I try it on *.jpg the
> file
> size changes. (Using my default setting of compression quality, if I'm
> not mistaken.) So it might rewrite *.png files, too.
>
> If the above succeeds, you can run a command like this (if you're on
> Win2k or WinXP):
>
> cmd /c for /R D:\Picts %i in (*.png) do C:\IView\i_view32 %i
> /convert=%i
>
> The above assumes IrfanView is inside the C:\IView folder and the
> *.png files can be found within the D:\Picts folder (and its
> subfolders). It should rewrite any *.png file found. Don't use too
> deeply nested folders. Else you'll encounter problems with the
> command line buffer size.
>
>> I used to have a little DOS utility that would recurse the directory
>> tree and run the same command-line on each directory in the tree.
>> That would work here, I think, together with an Irfanview /convert
>> command-line option.
>
> Maybe <Locate> by Charles Dye:
>
> http://www.highfiber.com/~raster/freeware.htm
>
> BeAr

Hi BeAr,

Worked like a charm. Thanks!

I never knew about the /R switch on the FOR command. We didn't have that in
the DOS version of FOR. Somewhere online there ought to be a complete
reference for all the XP internal/external commands, listing all the
switches, etc. with examples. I haven't found it yet.

On Thu, 06 Oct 2005 01:27:32 GMT, spoon2001 wrote:

> Worked like a charm. Thanks!

Fine. ;-)

> Somewhere online there ought to be a complete reference for all the XP
> internal/external commands, listing all the switches, etc. with
> examples. I haven't found it yet.

Try this:

http://www.microsoft.com/resources/d...us/ntcmds.mspx
www.ss64.com/nt

And of course a 'help <cmd>' (e.g. help for) on the CMD command prompt
reveals all switches, too.

BeAr
--
===========================================================================
= What do you mean with: "Perfection is always an illusion"? =
===============================================================--(Oops!)===