-rmeta reduces quality ?

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xenry
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-rmeta reduces quality ?

Post by xenry » Wed Sep 03, 2008 7:10 am

hello and thanks for the wonderful xnview =)

I am trying to write a simple program that uses nconvert to remove jpeg metadata (exif and so on). So I call nconvert with:

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nconvert.exe -rmeta [filename]
all works fine, the metadata is removed, but the jpeg file is a lot smaller ( as filesize ), about 2-3 times. I was wondering whether after the metadata removal the jpeg is resaved with lower quality? Any suggestions will be appreciated. Thanks in advance =)

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xnview
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Re: -rmeta reduces quality ?

Post by xnview » Wed Sep 03, 2008 7:59 am

Yes currently -rmeta doesn't work like clean in xnview, the picture is saved again
Pierre.

xenry
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Post by xenry » Wed Sep 03, 2008 8:42 am

thanks for the answer
so is there any way to access xnview->edit->metadata->remove all metadata externally? or any other workaround for removing metadata without losing quality ?

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xnview
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Post by xnview » Wed Sep 03, 2008 9:36 am

I'll add such option in next version
Pierre.

xenry
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Post by xenry » Wed Sep 03, 2008 9:48 am

thanks for the great support !

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DOS386
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Post by DOS386 » Thu Sep 04, 2008 9:31 pm

xnview wrote:I'll add such option in next version
:-)

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      -jpegtrans op     : JPEG lossless transformations
              rot90  : Rotate 90 degrees
              rot180 : Rotate 180 degrees
              rot270 : Rotate 270 degrees
              exif   : Use orientation EXIF tag
              vflip  : Flip vertical
              hflip  : Flip horizontal
          -jpegcrop x y w h : JPEG lossless crop
          -rmeta  : Remove Metadata (EXIF/IPTC/...) 
The bottom line is not yet lossless in 5.00 ...
There is indeed no WinZIP under my rock.

dadaniel
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Re: -rmeta reduces quality ?

Post by dadaniel » Tue Feb 05, 2013 2:51 pm

And it's still not lossless :(

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