Bug PrPro 2020: Export "Using Previews" not working
I have a timeline with several AE comps that I have rendered to the green status in GoPro 10bit
When I try to export an h.264 with the 'Use Previews' option the previews are ignored and AE is run in the background slowing down the export to a crawl, even thought I spent a lot of time rendering previews already. This is a straight export out of Premiere, not an AME export. This is a very typical workflow for a lot of projects and it's very frustrating that it's broken again.
- Create project with several Dynamic links in a timeline
- Render Previews for entire timeline in GoPro 10 bit(entire timeline is now green)
- h.264 Render
- Check use previews
- Export using Premiere....its going way going slower than it should
- Confirm in Task Manager that After Effects is using a significant %of CPU to render frames again instead of using the preview files.
Premiere Pro 2020
Intel i7 4770k (yeah I know I'm due for an upgrade)
RAM 32GB Ram
EVGA Nvidia GeForce GTX 1080 8GB
Preview files kept on scratch SSD
Project files on C:
Hopefully this can be addressed quickly its a real bummer.
Peter Delahunty commented
My understanding is that you can only 'Use Previews' when the export codec is the same as the timeline rendering codec - so it doesn't have to re-render. You can't magically convert GoPro 10-bit to h.264 8-bit without rendering again.
Scott Crozier commented
Strangely enough, AME does do it correctly, but PrPro does not. So I guess that is the workaround for now.
This is a crucial workflow for things like quick turn-around sport. It's something I use a lot. Couldn't do F1 coverage without it.