[REQ] Comments in rendered images

Heavily Tessellated · Post by **Heavily Tessellated** » Tue Sep 18, 2007 5:26 am

I'm sure this has been discussed before, but I can't find it in this forum, so just to "put it down on paper"...

Image file comments. As our renders/ directory gets more and more crap in it that we don't remember to rename when we should, it would be great if you would stuff some metadata into the render output image.

Perhaps have a block in the inifile.txt for Creator/Owner and Copyright where these could be predefined. A Source field that just logs the scene name, and a Rendered variable field that updated every write, detailing the elapsed render time, samples per pixel, and last render speed. (or maybe average?)

PNG supports iTXt (UTF-8) but libpng has it turned off by default for now, I'm assuming it's safer to stick with tEXt, while being only Latin-1, it still supports Tag:Data textual pairs. (or since you're including a zlib dll these days, perhaps ztEXt?)

EXR of course supports arbitrary data additions, you could add anything you'd like to the header...

suvakas · Post by **suvakas** » Tue Sep 18, 2007 6:28 am

[edit]
Nah..didn't like my comment. Sounded too harsh.
My point was - rename your images !!

Heavily Tessellated · Post by **Heavily Tessellated** » Tue Sep 18, 2007 7:33 am

Fair enough, but if you disagree- why did you bother posting at all? If it were open source you could suggest (however snide / sarcastic as you saw fit) that I implement it myself, but... uhh...

I also think it would be nice to know without remembering or keeping a log, how long renders ran. Maybe that's just me...

::edited for politeness::

suvakas · Post by **suvakas** » Tue Sep 18, 2007 8:12 am

I posted because i think there are more important things to take care of.

CoolColJ · Post by **CoolColJ** » Tue Sep 18, 2007 10:09 am

Heavily Tessellated - I agree, I went back to redo and check some older scenes and renders and it's a nightmare!

suvakas · Post by **suvakas** » Wed Sep 19, 2007 12:23 am

So using any other renderer that doesn't save images automatically is a nightmare for you guys? Must be a huge work to rename and save all those images manually.

(sry..couldn't resist)

zsouthboy · Post by **zsouthboy** » Wed Sep 19, 2007 1:28 am

I have requested that render time, etc. be put into .png files in the past, too.

So far, no dice.

It's not THAT big of a deal, but it would be nice.

Post by **OnoSendai** » Wed Sep 19, 2007 1:33 am

I'm having a look at this...
But how does one view the metadata?

suvakas · Post by **suvakas** » Wed Sep 19, 2007 1:56 am

zsouthboy wrote:I have requested that render time, etc. be put into .png files in the past, too.

Rendertime would be nice indeed.
But copyright and filename?

IanC · Post by **IanC** » Wed Sep 19, 2007 2:24 am

Ono, right click -> properties, usually. It also shows in various editing programs and some online galleries (I think).

Post by **OnoSendai** » Wed Sep 19, 2007 2:29 am

IanC wrote:Ono, right click -> properties, usually. It also shows in various editing programs and some online galleries (I think).

I'm not seeing any PNG metadata (e.g. Author) in the dialog tho.

Post by **OnoSendai** » Wed Sep 19, 2007 3:00 am

So i've tried writing tEXt chunks, and it seems pretty simple.
The issue is how to view the written metadata.
Sounds like Image magick might do it, but that's kind of clunky.
Any ideas?

Whaat · Post by **Whaat** » Wed Sep 19, 2007 3:37 am

EDIT: removed post...didn't see the ones right above...

Oiram · Post by **Oiram** » Wed Sep 19, 2007 4:13 am

libextractor

libextractor is a library used to extract meta-data from files of arbitrary type.

Currently, libextractor supports the following formats: HTML, PDF, PS, OLE2 (DOC, XLS, PPT), OpenOffice (sxw), StarOffice (sdw), DVI, MAN, MP3 (ID3v1 and ID3v2), NSF (NES Sound Format), SID, OGG, WAV, EXIV2, JPEG, GIF, PNG, TIFF, DEB, RPM, TAR(.GZ), ZIP, ELF, REAL, RIFF (AVI), MPEG, QT and ASF.
Also, various additional MIME types are detected.

http://gnunet.org/libextractor/index.php?xlang=English

libextractor is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

zsouthboy · Post by **zsouthboy** » Wed Sep 19, 2007 6:18 am

Any half-decent image editor should allow you to view the extra information.

[REQ] Comments in rendered images

[REQ] Comments in rendered images

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