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<p>I can confirm DaVinci Resolve is great for colour correction,
which is its primary function and the addition of an NLE came much
later in its history. You do need a half-decent GPU, though.<br>
</p>
<p>Helps if you shoot in log format, which looks washed out
unprocessed, but preserves all the dynamic range in the sensor,
rather than processing on-camera to make it look "normal". That
way you have more to play with when correcting in post. The
setting is sometimes labelled "film".<br>
</p>
<p>Getting a base correction is much easier if you have a shot of a
colourchecker card, as there is a tool in Resolve where you just
drag a grid over the frame, click a button and the process is
automated. There is an auto colour correction function that
attempts it without this, but results can be highly variable. Not
sure if anyone does underwater ones!<br>
</p>
<p>Mastering colour correction is a real skill / art form, but with
a bit of reading up and a basic understanding of what to look out
for when fiddling with lift, gamma and gain etc. — mainly losing
details in shadows, mid or highlights, else just looking in some
way pretty bizarre — you can often get some good improvements
without having to learn all the various tools and complex
multi-node corrections.</p>
<p>Resolve is not F/OSS, obviously, but gratis and this is not bad
considering it seemingly once cost something like $15-20K/seat. <br>
</p>
<p>Could be worth a look at OpenCine, but last time I checked it was
very much an early alpha.</p>
<p> <a class="moz-txt-link-freetext" href="https://wiki.apertus.org/index.php/OpenCine">https://wiki.apertus.org/index.php/OpenCine</a><br>
</p>
<p>Cheers,</p>
<p>Andrew<br>
</p>
<div class="moz-cite-prefix">On 27/08/18 11:01, Tom Ormiston via
Liverpool wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f45b5516-c663-5c3b-00d6-a8540ce29d53@appijumbo.com">
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<p>Hi Alex,<br>
</p>
<p>Kdenlive is good but the GPU rendering isn't sorted yet (same
for Shotcut) so it can be slow to render videos. It all depends
on what your doing.</p>
<p>Lightworks video editor is not open source but there is a free
version (720p)<br>
</p>
<p>If its just video (no sound - your under water?) you might want
to try Natron <a class="moz-txt-link-freetext"
href="https://natrongithub.github.io/" moz-do-not-send="true">https://natrongithub.github.io/</a></p>
<p>Its specifically designed for Hollywood level video
composition. <br>
</p>
<p>There are also many plug-ins, a quick search I came up with <a
class="moz-txt-link-freetext"
href="https://github.com/NatronVFX/natron-plugins"
moz-do-not-send="true">https://github.com/NatronVFX/natron-plugins</a></p>
<p>Checkout <a class="moz-txt-link-freetext"
href="https://opensource.com/article/18/4/new-state-video-editing-linux"
moz-do-not-send="true">https://opensource.com/article/18/4/new-state-video-editing-linux</a>
for some Linux based video editing info</p>
<br>
For Photographic work then Darktable is excellent (though for best
results, RAW image format) <br>
Have a look at <a class="moz-txt-link-freetext"
href="https://opensource.com/alternatives/adobe-lightroom"
moz-do-not-send="true">https://opensource.com/alternatives/adobe-lightroom</a>
and 'Keifer Hunniford Photography' or Shane Milton on youtube<br>
<br>
cheers,<br>
Tom Ormiston<br>
<br>
<div class="moz-cite-prefix">On 27/08/18 09:10, Alex Lennon via
Liverpool wrote:<br>
</div>
<blockquote type="cite"
cite="mid:e9b53eaf-6400-8b03-d046-f2aca1dea93e@dynamicdevices.co.uk">Hi
all, <br>
<br>
Apologies for the cross-post but I thought the LivLug group
would likely have some insights here too ... <br>
<br>
I have a number of pictures and videos I've taken on dives at a
depth of 10m-20m. As you'll know you lose components of the
visible light spectrum as you go deeper underwater, initially
red etc. <br>
<br>
There are various strategies to improve the pictures you take
underwater (strobe lighting, white balance correction) and there
is post-processing that can be done to improve the images. <br>
<br>
I've tried all sorts of tools but it very quickly seems to get
complicated and I can't seem to crack it. <br>
<br>
KDenLive looks good (opensource) and a friend recommended
DaVinci Resolve which also looks interesting. <br>
<br>
Does anybody have the time and interest to give me some advice
on how to drive a tool to improve the colour balance of my
media? <br>
<br>
Thanks! <br>
<br>
Alex <br>
<br>
<br>
</blockquote>
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<pre class="moz-signature" cols="72">--
Andrew Back
<a class="moz-txt-link-freetext" href="http://abopen.com">http://abopen.com</a></pre>
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