tools --> creat mpeg slideshow portrait problem

[cotcot]

I rendered a number of photos with the --> tools --> create mjpeg slideshow function of digikam (0.9).
The photos are a mixture of portrait and landscape. The rendered video shows all portrait photos in landscape (so 90° rotating compared to the preview in digikam (and any other app such as gimp gthumb, nautilus, .).
I do not find any setting to correct it.
(I have posted this on the ubuntu forum yesterday but there is no reply till now.)

[Arnd Baecker]

On Fri, 11 Jan 2008, cotcot wrote:

> I rendered a number of photos with the --> tools --> create mjpeg slideshow
> function of digikam (0.9).

Could you give the precise versions of both
- digikam 0.9.x   x=?
- kipiplugins
(see the About information of digikam).

If I remember correctly, there was a bug fixed recently
about image rotations ..

Also note, that this is most likely
a kde-imaging (kipi-plugins) issue, because this is
what is used by digikam for the slideshow.

Thanks, Arnd
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[cotcot]

digikam 0.9.2-final
kipiplugins 0.1.4-1build1  (ubuntu gutsy)
kipi library 0.1.5

Bugzilla from [e-mail] wrote

Could you give the precise versions of both
- digikam 0.9.x   x=?
- kipiplugins
(see the About information of digikam).

[Arnd Baecker]

thanks for the info!
I was trying to search in the list of bugs, but:

  "bugs.kde.org is temporarily offline to celebrate KDE 4.0.0 launch."

(I better save my comments about this offlining for a
quiet room in my house ...)

So this will have to wait until the party is over ....

On Fri, 11 Jan 2008, cotcot wrote:

>
> digikam 0.9.2-final
> kipiplugins 0.1.4-1build1  (ubuntu gutsy)
> kipi library 0.1.5
>
> Bugzilla from [hidden email] wrote:
> >
> >
> > Could you give the precise versions of both
> > - digikam 0.9.x   x=?
> > - kipiplugins
> > (see the About information of digikam).
> >
> >
>
>

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https://mail.kde.org/mailman/listinfo/digikam-users

[cotcot]

I think I have solved the mpeg slideshow problem.
I have done a couple of tests to understand better where the 'rotate photo' is stored and which rotate info is used during mpeg rendering.
If I rotate a photo with digikam or gthumb the exiv data do not change. If i do so with gimp the exiv data change.
If a portrait photo is shown as landscape i have 'right-top' in the exiv data. Turning it with digikam or gthumb is still 'right-top'; when i open a 'right-top' photo in gimp then gimp asks automatically to correct the orientation. Answering yes makes the exiv data change to 'top-left'.
Making a slideshow with digikam, kdenlive or cinelerra shows the photos with 'top-left' correctly.
So the digikam mpeg slideshow problem seems solved. I am now somewhat confused with the photo orientation. Obviously it does not make sense to rotate photos with digikam if you render them to a slideshow with digikam or any other tools ? Or do I need to thick 'Embedded preview of the full image size' in the Album settings' ?
And another question is that my digital camera (Canon 350D) sometimes does the orientation correction and sometimes does not. This needs some experimenting but has nothing to do with digikam.

[Arnd Baecker]

On Sat, 12 Jan 2008, cotcot wrote:

> I think I have solved the mpeg slideshow problem.
> I have done a couple of tests to understand better where the 'rotate photo'
> is stored and which rotate info is used during mpeg rendering.
> If I rotate a photo with digikam or gthumb the exiv data do not change. If i
> do so with gimp the exiv data change.

Image rotation is handled by:
  Product: kipiplugins
  Component: jpeglossless

To me this sounds like a bug which has been fixed,
maybe this one:
  http://bugs.kde.org/show_bug.cgi?id=148621

I think this fix was done after your version
kipiplugins 0.1.4-1build1  (ubuntu gutsy)

> If a portrait photo is shown as landscape i have 'right-top' in the exiv
> data. Turning it with digikam or gthumb is still 'right-top'; when i open a
> 'right-top' photo in gimp then gimp asks automatically to correct the
> orientation. Answering yes makes the exiv data change to 'top-left'.
> Making a slideshow with digikam, kdenlive or cinelerra shows the photos with
> 'top-left' correctly.

the slideshow should also auto-rotate images correctly ...

> So the digikam mpeg slideshow problem seems solved. I am now somewhat
> confused with the photo orientation. Obviously it does not make sense to
> rotate photos with digikam if you render them to a slideshow with digikam or
> any other tools ? Or do I need to thick 'Embedded preview of the full image
> size' in the Album settings' ?

Everything should work without any additional thoughts.
In current version most of the image rotation issues
should be solved.
If you observe a problem with the latest version,
i.e. digikam 0.9.3 and
kipi-plugins 0.1.5-rc1
libkipi 0.1.5
libkexif 0.2.5
libkexiv2 0.1.6
libkdcraw 0.1.3
(see http://www.kipi-plugins.org/drupal/?q=node/5)
and exiv2 0.16 (http://www.exiv2.org/)
then please file a bug report in the bug tracker.
(Note that to check this most likely will mean
that you will have to compile from source ...)

> And another question is that my digital camera (Canon 350D) sometimes does
> the orientation correction and sometimes does not. This needs some
> experimenting but has nothing to do with digikam.

I also have that camera and rarely encounter orientation
problems. Only for very wierd shooting angles
the orientation detection gives incorrect results ...

Best, Arnd
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[cotcot]

It is OK now. I have compiled everything mentioned in the previous post and also digikam 0.9.3 on my test distro (gutsy 32 bit).
During import of the images I saw that digikam has put the orientation in the exif info all top-left (as it should). Rotating images is also OK. (in digikam 0.9.2 i have to give the rotate instruction sometimes twice to get it working).
The mpeg movie from the image made with the kipi plugin is OK.
Thanks and congratulations !