rendering with captions insanely slow (Premiere Pro 14.9, and earlier)

[jeftaylor]

First time working with captions in Premiere, and it's not going well. Added captions to a simple 45 second video, ProRes 422 HQ, and they are each taking upwards of ten minutes to render in the timeline. If I don't render them in the timeline, I can't playback at all.

Running on a fully maxed out iMac Pro w/Mojave. 

Please help, thank you.

[Sumeet Kumar Choubey]

Hi jeftaylor,

Sorry to hear that you are facing issues with rendering. Please check if Mercury Playback Engine GPU Acceleration is set as Renderer.

FAQ: How to change the Video Renderer in Premiere Pro?

Let us know, we’re here to help.

Thanks,

Sumeet

[jeftaylor]

Great. My GPU Acceleration is set to Metal, I'm not sure how to set it to "renderer" – it is the renderer.

I also can't seem to export the video with the captions – when I export, the captions don't appear on the exported video. This makes the entire captions feature useless.

Any suggestions?

[Stan Jones]

What kind of captions? Closed, open? Are you trying to burn in?

[jeftaylor]

Open captions, and yes – trying to burn in. In one sequence I can't even get them to display correctly – the formatting is all over the map.

I've tried deleting render files, re-importing subtitle file, deleting cache files.... nothing works.

[Stan Jones]

Re the export, there is a known issue with AME not burning in open captions (or closed) if the AME preference for "import natively" is not checked. A test for that issue is to export directly from PR instead of queuing to AME. If you try setting AME to "import natively," you must set it BEFORE queuing.

The slow render is not an issue I have heard. Test this by creating a new open caption stream in PR with only a few captions.

How many captions in the file you are importing. What type of file, srt?

[jeftaylor]

It's an .srt, and it's a 45 second video so there aren't that many captions at all.

Frankly, the slow rendering isn't really the problem at this point – the inability of premiere to display the subtitles properly, or update the subtitles if I change their formatting, is the main problem. I have a deadline and I need to get these exported.

I assume you've heard of issues like this, because they're all over this forum. I also hope you have a solution.

Thank you.

[Stan Jones]

Oh yes, they can be a problem.

I am not having an issue formatting all captions in recent versions of PR. What specific dot version are you running?

The "captions don't update in the program monitor" etc is a big pain. I'll look for a link to a post with the various workarounds when I am home later.

[Stan Jones]

There is no single workaround, but a group to try:

Re: Can't edit caption style

[jeftaylor]

I'm using the most recent version of PP, and none of the workarounds work.

I don't understand why they have a feature that has so many issues.

[brett_jr_alton]

Editing Captions with the captions dialogue itself is slow, let alone rendering. It uses 800% of my CPU to edit text with Premiere Pro 14.0.0, build 572.