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Preview rendering time …?
Hmm, not really sure which forum to post this in but ‘Adobe Premiere Pro’seems fairly generic 🙂
OVERVIEW: I’m creating a 4-layered greenscreened comp in After Effects using footage exported from a Premiere Pro Project, adding a couple of effects and lights.
OBSERVATION: If I edit the comp, then switch back to PP to do a preview render, I notice it takes around 10 minutes to prepare. However, if I make a RAM-preview in After Effects that takes around 5 minutes to complete. Then if I switch back to PP and make a preview it only takes a few seconds to prepare.
Clearly PP is using the RAM-preview from AE to compile it’s own preview …
Can anyone suggest a reason why the After Effects engine A) renders faster and B) why PP shouldn’t be capable of the same performance? If the memory settings are shared between the two apps then surely the same timescales should apply?
Grateful for any insights!
My setup: MAC Pro 8-core 2.4Ghz, CS5, 32gb …
Regards
Dean -
2 Replies
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Dynamic Link works from After Effects to Premiere Pro by having an invisible “headless” instance of the After Effects renderer doing all the work and passing the completed frames to Premiere. There are a few Ae features working together that contribute to the speed difference you see.
First, the normal Ae renderer is capable of multiprocessing — that is, launching multiple copies of the Ae renderer and rendering multiple frames on multiple CPU cores at the same time. The single headless instance of Ae used with Dynamic Link does not have this capability and must render only a single frame at a time.
After Effects also has some new caching features introduced in CS6 that allow it to avoid re-rendering frames that it had already rendered. This does work with Dynamic Link, so once you’ve rendered or previewed in Ae, the frames can be cached and delivered to Premiere via Dynamic Link without re-rendering.
Walter Soyka
Principal & Designer at Keen Live
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Ah, thanks for sharing the knowledge sir, it makes perfect sense 🙂
Rgds Dean
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