How do I import closed captions in Premiere Pro CC?

Question

Now that Premiere Pro has close captioning we can import text as a layer in the timeline.
However, it only takes certain types of files. In the top video of this page: http://helpx.adobe.com/premiere-pro/using/closed-captioning.html
Jeff Sengstack says that Premiere can accept 4 different file types for close captioning but he only mentions Scenarist.
I have my close captioning file in a .txt format but Premiere will not allow that type of file. So I have a couple questions:
1. What are the other file types that can be imported for close captioning?
2. Is there a way to convert a .txt file to a Scenarist format (scc)?

Answer 1

And here I thought I was giving you more info than you asked for, but fair point ;-)
So first of all, 608 and Teletext are different standards for encoding captions. In general, 608 is for NTSC (the video standard in the U.S., Japan, and several other countries), while Teletext goes with PAL (Europe, China, Australia, and elsewhere.) There are a number of differences between them. To learn more, you might start with this Wikipedia article: http://en.wikipedia.org/wiki/Closed_captioninghttp://en.wikipedia.org/wiki/Closed_captioning.
As for how to convert your .txt file to one of the supported file types, I don't have a direct answer, but you might start by searching the Web for "captions convert txt to scc." I have limited experience with a few of the third-party captions authoring apps, which I expect can ingest a txt file and encode it in the given app's preferred flavor. On the 608 side, the ones I know of are CaptionMaker (for Win) and MacCaption (I'll let you guess which platform that's for). For Teletext, you might try Annotation Edit. Note that I'm merely listing the ones that I'm familiar with. I really don't know enough to recommend any of these programs.
One final note: The captioning features that we added to PPRO CC are geared toward providing a flexible workflow with imported captions--i.e., captions authored in some other program. PPRO CC now supports editing caption content (say to correct a typo or expunge swear words) and trimming caption track items just like any other assets.
You can also create synthetic caption assets and populate them from scratch, which could be handy for short projects or for filling holes in the imported caption sidecar. However, I would not recommend attempting to author all the captions for a project of any substantial length within Premiere. It's simply not designed for that, and there are dedicated programs that do this far better.