"Blending/composite" of multiple videos of same scene

lewist57 wrote on 9/10/2018, 8:36 AM

For simplicity sake, lets assume I have 3 videos of the same scene, a series of chairs. The camera and chairs are in the same position for each video. However each video has a person sitting in a different one of the chairs (e.g. - the first video has a person in the first chair, the second video has a person sitting in the second chair, and the third video has a person sitting in the third chair).

What is the best method to "blend/composite" the 3 videos into one video, giving the illusion that all three persons were sitting in all three chairs at the same time?

Comments

john_dennis wrote on 9/10/2018, 9:11 AM

If the chairs are side-by-side with no overlap or foreground/background considerations, you could just divide the screen into thirds with Pan/Crop.

Harold-Linke wrote on 9/10/2018, 9:17 AM

If a simple Pan/Crop does not work you can use the new Beziere-Mask effect to precisely cut out the persons. See the examples for motion tracking ...

lewist57 wrote on 9/10/2018, 9:23 AM

If a simple Pan/Crop does not work you can use the new Beziere-Mask effect to precisely cut out the persons. See the examples for motion tracking ...

Alas, the people do overlap, at least in the upper half of the videos, so it appears that I have to cut out all but one person from the background and then determine who overlaps whom. Thanks for your input.

Mindmatter wrote on 9/10/2018, 5:28 PM

not sure if this is what you're after, but try 3 tracks, and a positive mask of a different third of the frame on each.

could you post a screenshot?

lewist57 wrote on 9/15/2018, 3:53 PM

Well, I had some unexpected extra downtime this weekend due to a nearby hurricane, and fired up Resolve 15, watched a couple of YouTube videos, and accomplished the desired result in less than an afternoon. Wound up with 8 layers with masks, but the end result is quite good.

I am sure I could have done exactly the same thing in Vegas Pro, but did want to test Resolve for myself. It would appear that neither Vegas or Resolve has the rotobrush/edge tool capabilities of After Effects (unless via plugins?), which would make the job a lot easier.

karma17 wrote on 9/16/2018, 4:12 AM

Yes, it would be same thing as creating a clone of yourself or clone army, just need to mask out each area that you want to appear over the clean plate. Once I got the hang of masking in Vegas, I actually find it pretty easy now. I see so many people just laying down a ton of anchor points and not using the Bezier curves, so they end up putting 5x more anchor points than they need to and the mask isn't as aligned as it could be. You should post a sample of what you came up with.