[Nix-dev] ImageMagick and xwd

[Roni Choudhury]

Hi Eike-

You have to let *convert* know the image type coming in on stdin:

    *xwd -root | convert xwd:- screenshot.jpg*

You may also be interested to know about the *import* command, which comes
with ImageMagick:

    *import -window root screenshot.png*

That command will take a screenshot and automatically convert to an output
format based on the file extension you choose.

Hope this helps,

roni

On Tue, Nov 29, 2016 at 6:25 AM Eike <eike at eknet.org> wrote:

>
> Hello,
>
> I'm used to do screenshots with xwd and imagemagick like this:
>
>     xwd -root | convert - screenshot.jpg
>
> Currently (17.03pre95306.a24728f (Gorilla)) with imagemagick 6.9.6-2 I
> cannot convert xwd dumps to jpgs anymore:
>
>     $ xwd -root | convert - screenshot.jpg
>     convert: no decode delegate for this image format `' @
> error/constitute.c/ReadImage/504.
>     convert: no images defined `screenshot.jpg' @
> error/convert.c/ConvertImageCommand/3257.
>
> I tested with the version of commit fa6c6dae7 (which is 6.9.5-10)
> successfully but with the update to 6.9.6-2 (commit 241cd0e5d) it
> stopped working. So it looks like it is not supported anymore with
> imagemagick 6.9.6?
>
> I could not find related info doing a quick search on the web. Does
> anyone know more about this?
>
> Thanks and regards
> Eike
>
> --
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