How to make a duplicate graphic layer of a captions layer?

[DROZD01]

Hello everyone!
Is there a way of creating a layer made of static frames (basically just an imported .png from footage) that would match the captions layer (imported .srt file)?

Process of adding an image and sizing it to every caption block is way too time consuming.

[MyerPj]

Maybe @Stan Jones has an idea?

[DROZD01]

Basically i wanna do that, but automatically (purple blocks are that .png):

[Stan Jones]

Why a png? What are you going to do with it?

One at a time/manual is the only option I'm seeing so far. But Upgrade Caption to Graphic or methods using After Effects might do what you want.

Stan

[DROZD01]

Original video had it's subtitles on a sort of a "frame":

 
In order to place my own subtitles - i have to cover up the old ones somehow, and cutting out that frame and placing it over the original subtitles seemed as the only option.

I tried converting subtitles to the graphics type, but it's a "text graphics" type, and i couldn't find any option to replace one or all the new "text graphics" with my .png. 

[PaulMurphy · Accepted solution]

If the PNG background is the same clip, you can do the following:

1. Add the PNG to a new track (e.g., Track 4) and make sure it spans the length of your edit.
2. Duplicate the PNG to the track above (e.g., Track 5).
3. Copy all your captions and paste them to a new caption track.
4. Select these new captions and choose Captions and Titles > Upgrade Captions to Graphic. This will add a new track (e.g., Track 6) to your sequence with all your captions converted to graphic clips.
5. Select all your converted graphic clips on Track 6, and press Option/Alt + Arrow Down, then Option/Alt + Arrow Up. This will create gaps in the PNG on Track 5 wherever there are captions.
6. Now select all these newly made PNG clips on Track 5, and do the same thing again - Option/Alt + Arrow Down, then Option/Alt + Arrow Up. This will create PNG clips wherever there are captions on Track 4.
7. Delete Tracks 5 and 6.

[DROZD01]

Truly an excellent advice! It worked! 
Thank you for making a couple-of-hours task into a one-minute task!

[Stan Jones]

Or... Duplicate the caption track as @PaulMurphy describes.

Select one of the upgraded graphics.

Turn on the background. Make it 100% opacity and adjust the size to something that covers the old frame - I used 20 in my test.

Turn off Fill (and Stroke and Shadow if used in your captions) - text disappears.

Create a new style and save in project.

Select all the upgraded graphics and drag the style from the Project Panel.

I wonder about issues with mixed one- and two-line captions.

Stan