Open Captions are not visible when exported

I'm going to chime in & say I've had an absolute nightmare with the captions. All looked fine in playback, except when I went to render the timeline, without touching a single setting, it would squeeze the aspect ratio. Definately wouldn't output. I tried everything in all the other posts, including modify, removing any resizing, with no luck. Then I thought to finally check the sequence settings and discovered:

-Premiere Open Captions are apparently NOT compatible with ProRes 422 video preview settings.  I initially changed them to Animation, which finally allowed me to render without applying a squeeze.

-but, once I rendered, nothing showed up. As indicated here, I can confirm that one cannot export Open Captions in Quicktime, h265 (HEVC), or a variety of other modern codecs. You're stuck with h264, MPEG2, MPEG4 and other compressed settings. The quality is not amazing.

-I WAS able to change Sequence Settings->Video Preview settings. Didn't ProRes 422, but oddly ProRes HQ allowed me to render in the timeline without issue. I was hoping to export now as a quicktime, but no luck. As with above, stuck with h264 as the best option. I don't believe I'll be using this tool again until it's fixed - it's clunky, slow, and as we're seeing here - plagued with compatibilty issues.

Yes, Open Subtitling is not the same as Open Captions. Open Subtitling is actually a form of closed captions. 

I assume you want to burn in, in which case you definitely want Open Captions. You can convert Open Subtitling to Open Captions. Before you start, keep a backup of your project. Note that you cannot convert from Open Captions to anything else. So you can't undo this once done.

In the Project Panel, right click on the Open Subtitling caption stream, and File -> Modify -> Captions. Then pick Open Captions.

Stan

Post a screenshot of your caption panel. The most likely cause is that you either have something other than Open Captions (e.g. closed captions 608 or 708 require special Program Monitor settings to see them) or you have a mismatch between the caption stream pixel size and the sequence setting.

Stan