Unsupported color conversion request

[Anjanesh]

For many JPGs I get :

cwebp -q 75 01.jpg -o 01.webp
Unsupported color conversion request
Error! Could not process file 01.jpg
Error! Cannot read input picture

All are of RGB colour space not CMYK.

[Vikas Arora]

Can you upload the jpeg file.

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[Vikas Arora]

This jpeg image has 4 color CMYK components and currently not supported in the example implementation of webp encoder (cwebp).

You can try converting to RBG color-space via ImageMagick (convert) or any other image-editor tool.

convert -colorspace RGB 05.jpg 05_RGB.jpg

cwebp -q 75 05_RGB.jpg -o 05_RGB.webp

On Mon, Apr 18, 2011 at 9:30 AM, Anjanesh Lekshminarayanan <anja...@gmail.com> wrote:

wget http://germfree.commondatastorage.googleapis.com/images/tiles/wall/135/05.jpg
cwebp -q 75 05.jpg -o 05.webp

---------------------------------------------------------
Thanks & Regards
Anjanesh Lekshminarayanan

[Anjanesh]

Thanks. GIMP shows all of them as under RGB colorspace.

ImageMagick showed it as CMYK.
identify -format "%[colorspace]" 05.jpg
CMYK

[elan...@gmail.com]

exec("convert -colorspace RGB ".$imageName." ".$webpimgName . " ");

http://www.codingslover.com/2015/07/cwebp-unsupported-color-conversion-request.html

[James Zern]

Hi,

On Mon, Nov 7, 2022 at 12:35 AM MND LSN <mnd...@gmail.com> wrote:

I am on `Ubuntu 20.04 (LTS) x64` with `cwebp -version 1.2.4` and while processing about 320,009 files with this    

```

nohup `for file in img/*; do cwebp -quiet -q 50 "$file" -o "${file%.*}.webp"; done`

```

I get this kind of errors 

```

libjpeg error: Unsupported color conversion request

I think this has a similar root cause as https://crbug.com/webp/311#c5. The error comes from libjpeg which is outside of cwebp's control. The input is CMYK and the example is requesting RGB (djpeg -rgb will fail similarly). The tool could add a conversion, but the same issue as the libjpeg-turbo patch exists. It might be worth trying ImageMagick for the conversion.

 

Error! Could not process file img/037946023.jpg
Error! Cannot read input picture file 'img/037946023.jpg'

```

Attached below the example image `037946023.jpg`

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[Nicely done]

Hello I have similar issue on ubuntu

libjpeg error: Unsupported color conversion request

Error! Could not process file 345632.jpg
Error! Cannot read input picture file '345632.jpg'

On windows everything is fine though.

вівторок, 8 листопада 2022 р. о 03:05:34 UTC+2 James Zern пише: