Hi,

I shoot with an SLR in RAW-only mode. I've traditionally used
f-spot+ufraw to manage my workflow, it's worked fine but it's not a
great solution. Now that f-spot has stagnated I've been looking at
other options and darktable seems very exciting. I took it for a spin
a few weeks ago (version 1.1.3 on Ubuntu 12.04) to process some
pictures I had taken at a friend's wedding and took some notes. I
figured I'd edit them into a coherent use report in case the
developers were interested. Here it is.

General thoughts
- The non-destructive, "all edits are really just metadata", way of
working gets top marks. It's the way to go to edit RAW files
- The stars/colors/tags facilities to classify photos fit right in to
the way I want to work. I use the stars to evaluate absolute quality
of the photos, the color green to mark the ones I've selected and the
tags to describe what the pictures are about.
- The program seems to do great things in terms of the RAW pipeline. I
find the interface a bit hard to use to process a large number of
images quickly.

About the main interface
- There's no quick way to change from viewing 1 image to viewing the
table (double click moves into edit mode which is almost certainly not
what you want).
- Here I'd suggest double click still bringing you back and forth into
edit mode but have it also show the ratings/colors, allow them to be
changed, and respond to page up/page down to change image. This would
almost eliminate the need for the bottom slider in edit mode and make
editing a bunch of images in sequence much easier.
- I couldn't find a way to search by color, only to sort by it. After
doing the selection I'd like to be able to restrict the list to only
green marked images as those are the keepers in my workflow.
- When looking at a single image the metadata (name, file, etc) is
overlayed on the image. Get your text out of my images! :)

Edit mode
-There's way too much space spent with the settings tabs leaving a
very small image, making editing very hard on a laptop. The top bar
also wastes a bunch of space with a huge darktable logo and the
"lightable | darkroom | tethering | map" selector. With my edit mode
suggestion you could just eliminate that selector and just have a
tethering button somewhere.
-There's no way that I could find to apply the same settings to a
group of images, the only one I found was saving a style and then
going image by image, selecting "original", collapsing the stack down
and then applying the style (way too many clicks). When working a
large set of images this is incredibly frustrating. This is what I had
to do with ufraw and was hoping that something that joined the
functions of f-spot and ufraw allowed me to apply a set of RAW
settings at once to a bunch of images and only then go one by one and
fine-tune the ones that need it. Here again the distinction between
lighttable and darkroom seems superfluous. I should be able to have
the edit pane open just the same for a single image as for a set of
images, the same way I should be able to set a tag on a single image
or to a group. The more I think about it the more I think the
lighttable/darkroom distinction doesn't make sense in a digital world.
-In the history stack, if you try something and set in on and off
you've just poluted the stack and there doesn't seem to be a simple
way to just remove a line from the stack. Instead of saving a sequence
of events I'd just have a list of what plugins are on, and not show
anything that's off.
-Even though a lot of space is spent on settings it's often hard to
access them, as they'll scroll out of the way, and it's not clear the
pane is scrolled down. The dark theme needs to give some contrast to
the scrollbars.
-The sliders in the plugins (e.g., exposure change) are very hard to
use precisely with the mouse (very small targets) and don't seem to be
keyboard accessible
-I'd suggest a single pane holding all the settings as icons and
somehow indicate which are currently active (desaturate the disabled
ones for example)

Export
-The interface here is a bit cryptic but serviceable
-The export seemed to bring the rest of the app to a crawl (this might
be because I was running it in a VM environment). Running the export
at idle priority might be a good idea

Others
- It's happened a few times to me using the Ubuntu ppa that after
first opening and closing darktable once, every time I try to run it
again it will not open and become an unkillable process (kill -9 has
no effect). I can run it as many times as I want and spawn an
unkillable process every time. Ubuntu hangs on restart (probably
waiting to kill darktable) so I have to hard-reset it.

Let me know if any of this wasn't clear and if you want to discuss this more.

Cheers,

Pedro

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