00:00So hello my friends and welcome to another mini tutorial on DaVinci Resolve.
00:06Today I'm going to talk about my process for noise reduction, which I seem to have to use
00:13quite frequently because my, unfortunately, Blackmagic Pocket Cinema 6K doesn't really
00:20do well in low light.
00:23As fantastic of a sensor it is and produces lovely images, in low light it doesn't do
00:30so well.
00:31And the other day when I was filming the Great Crested Greaves on the lake, in the early hours
00:37before the sun came up in low light, the images did come out a little bit noisy and I had
00:44to
00:44apply some noise reduction.
00:46So I thought I would talk you through my process of doing that today.
00:50Again, I should say that I am not a professional video editor.
00:54This is just a process that I use that seems to work for me.
00:57I don't know if it is the exact right way of doing things as far as noise reduction goes.
01:04But it seems to produce an okay result.
01:07So that being the case, I'll get the screen recording going and we'll dive into it.
01:13Okay, so I've got the screen recording going and I've opened up DaVinci Resolve and loaded
01:22into it one of the clips from the lake the other day filming the Great Crested Greaves,
01:29the early morning shots.
01:31And as you can see it's quite, if I put that full screen, you can see it's quite a noisy
01:36image,
01:36especially here in the shadows.
01:39So I want to try and correct that.
01:43And the way I do it, I should say I've also, I've done the color grade on it so far,
01:49so I've added in all my nodes for the color grade.
01:53So for the, again in the color module down here, I want to add in an extra node for the
02:01noise reduction.
02:02So highlight the last one here, the number three, hit option S to add the extra node and I'll put
02:11the noise reduction on this node.
02:15The module for adding noise reduction is this one over here, motion effects, and you'll want to have your scopes
02:26open for this as well,
02:27so that you can see the immediate effect of adding noise reduction on the scopes here.
02:34So we'll start off over here on the left, temporal NR, noise reduction, and I usually choose three frames.
02:43And better quality.
02:46I then add in, just by clicking and sliding on the Luma, they're all linked here anyway, so it adds
02:53it evenly across the board.
02:55And what I do is, what you want to do is, as you increase the Luma threshold here, you want
03:05to keep your eye on the scopes,
03:07and you'll see it, the signal here cleaning up.
03:11As I do it, I'll do it extreme so you can see the difference, so that's pushing over the Luma
03:18quite hard,
03:19and you can see the difference as I back it off again.
03:23So what you want to do is, what you're trying to do is clean up the signal slightly,
03:28and you want to go so far as to when you start seeing the image, the scope here clean up,
03:36but not too hard, because then the image sort of turns to plastic.
03:42So if I back that off and go slowly, about there seems right, which is about 4.6 on the
03:51Luma scale here.
03:53The next step is to add in some spatial noise reduction.
04:00Again, for mode here I will choose better.
04:04You can change the radius if you want to medium, I tend to keep it on small.
04:09And again you want to start adding in the Luma, and again you'll see the scope starting to clean up.
04:15And this normally works out to about double the temporal threshold,
04:21so 4.6 is what I've pushed the temporal threshold to.
04:26So this will be about 9.2, if I push that up, and keep watching the scopes on the right,
04:33and you see them start cleaning up, the signal starts becoming cleaner.
04:38So get that onto 9.2, there we are, and put it up to full screen.
04:47And you can see that's actually cleaned up the image.
04:49If you look here in the shadows, a lot of that noise is gone.
04:52I think I've actually pushed it a little bit too hard in this instance, so I might back that off
04:57slightly.
04:59Back off to about 8, and push this down to about 4 as well, and have another look.
05:10I think that's a bit better.
05:11It still looks fairly natural, and a lot of the noise has disappeared.
05:20The thing with adding noise reduction into your edit is that, even though this is a relatively new laptop, it's
05:32a 2024 Mac.
05:35But it still struggles when adding in noise reduction to actually run cleanly.
05:41And you can see it's a little bit jittery when I hit the play button.
05:45As soon as I turn that off, it runs smoothly.
05:49So what I tend to do in order to keep my whole editing of the video smooth, is as I
05:57add in my noise reduction node to each of the clips that need it,
06:03I'll add it in to the extent that I want it, and then turn it off just by clicking on
06:09the bottom left on the number,
06:12so that I can keep editing smoothly without the image slowing down and making editing difficult.
06:21And then, once I've finished the edit, I'll go back through and turn each of these on before exporting it.
06:29So, I hope that's been of some help to you.
06:33Do drop a line in the comments below if you have any more questions about it.
06:41And, yeah, hopefully you found this useful.
06:45Thanks so much for watching, and I'll see you again soon. Bye for now.
06:59Bye.
07:24Bye.
