Why convert a green screen clip to a new clip with a transparent alpha channel?

It occurred to me there's another way.

From the browser, Open your clip in its own timeline [select the clip in the browser and go to Clip > Open Clip].

Apply the Keyer to create the transparencies.

Forever after, the clip will be applied to any storyline with the transparency. If you don't want it or need it later on, you can Open Clip from the Storyline and turn off the effects you've applied, go back to the storyline and apply new effects. If you want to change some aspect of the effects you can open the clip from the storyline and make edits — this will NOT affect the effects settings of the Browser clip version. This means that you can simply load up some basic effects from the browser, and after applying to the storyline, you will already have those basic effects available in the clip [to make changes, Open Clip from the storyline...].

Since you already have a transparent clip you'd like to use later on, you can find that clip in its project, select it and copy it, then find the clip in the Event Browser and Paste Attributes. Again, this will NOT affect any of the same clips already applied to Projects previously - only going forward. (How cool is FCP?) Furthermore, if you have a lot of clips you want to "save" with Effects already applied, you can create a New Library to hold them/keep them organized together. Multiple Libraries can be open and accessible at the same time, so...

I usually use the technique for "cleaning" and coloring clips so they're just "ready to go" when I apply them. I made a keyboard shortcut for Open Clip (⌘-⌥ - O) which makes the process almost seamless (also why it took so long to "dawn" on me — I just don't normally use it for greenscreens.)

What does this do? It keeps from having to encode extra ProRes (any kind) clips or duplicating them outside the application. I don't have a lot of disk space to waste.

...just another way of looking at it...

HTH

I suppose it depends. If you are going to use that clip multiple times it may be easier to make it transparent once and for all. Or if you are sharing it with someone else, who may not have a good keyer or knowledge but could use it as is. In most cases, probably you just use the clip once in a project, and making a separate fully transparent version brings nothing to the table.

At the top of the thread you will see "Best", and you can change to "Oldest" to restore some sanity.

In order to avoid having to do this every time you visit the forum, you can make this change in the preferences for your profile. Then whenever you are logged in the pages will display in chronological order.

How someone thought this was a good idea is beyond me.

I think the reasoning is that when people search the forum, and they find a similar question, they immediately get the best answer, rather than having to scroll through perhaps multiple pages to find there is no answer.

I base this on the new upvoting system. Out of curiosity I turned on upvoting notifications. I’m getting upvotes from questions I answered in 2018.

But you’re right, for frequent users it’s an impediment.

For some reason this question appeared in my e-mail. I had not noticed the date.

fox’s was short lived. I only saw it in notification.

Hope you got a smile out of it... ! I was right... cancelled.

I did. The link was broken unfortunately. Also removed.