DR 14.3: External Mattes, why offset?

Hi,

I have a clip in my timeline with an external matte in the Color tab.

But the animated matt does not start where the clip begins.
It seems to me that the matt starts from the beginning of the clip source, so I have to find the start point of the matt animation via the offset slider to match the clip start in the portion.

Do I miss something?
How canI force the external matt to play when the clip itself plays?



Jeff

Feedback from my studio partner:

So we did another test. The problem seems to be that the matte always plays at the beginning of the source clip. The matte does not play at the beginning of the clip portion. You need to compound the clip portion first and than add the matte there. This is very odd.

Any better solution for this?

[Dmitry Kitsov BMD]

Hello, Jeffrey,
you may find the offset slider, found in the Key pane of the color page to be useful for adjusting the timing of the external matte node.
The values can be adjusted by up to one million frames before and to one million frames after the default timing of the matte clip:

Key pane on the Color page

keymatte.png (32.79 KiB) Viewed 3037 times

Hello Dmitry,

Yes, I am aware of this slider. But look at the picture below:

When I use only a portion of a clip, I really never know the exact offset (named "a" in pic).
And it may change due to final edits. It actually makes no sense that the matte starts at the clip source beginning, not at the cut position. Especially if the matte has a shorter duration then the starting point of the portion is (offset “a”).


Jeff

Hey,

run in the same problem with DR 16.
Offset works, but sometimes more work as needed.

My Idea: while we are using EXR - Mats , the can store the clip-timecode from the source, so it should be easy for your Dev team , to sync the external Mat to the Clip attached on (if the timecode is a part of the source timecode) , if not, then it is how it is now. Good?

Furthermore, there is a bug when using "opticalflow" - retiming. The extarnel MTA dindt match at all frames. :/

Unless I'm totally overlooking something, Resolve 16.2.7 still does not align External Mattes with a clip based on source timecode

Of course you can use the Matte Offset slider, but there is no way to see the alignment of the offset without having to switch back to the main node and eyeballing the alignment by trial and error. As far as I can tell, you can't adjust the Offset while still watching the results of the matte on the main node, like you would be able to do in Fusion.

Bumping this feature request. Still can't align external mattes in Resolve 19 beta using embedded timecode.

And here we go... Davinci Resolve 20 Full Release - the issue still persists

So the timecode of the matte is ignored, is it? Crazy.