Re: image-dired does not rotate the original image

[Mathias Dahl]

> emacs -Q
> M-x tumme [some directory with jpegs]
> R (image-dired-rotate-original-right)
>
> yields the following error message:
>
>   image-dired-rotate-original: Could not rotate image

By default, `image-dired-cmd-rotate-original-program' is set to
jpegtran, which is a command that can rotate a JPEG without quality
loss. This is a must, unless there are other tools that does the same
job. Do you have this program installed? Can you call it from a
terminal?