Adrian Ward

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  1. 9 votes

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    4 comments  ·  After Effects » Performance  ·  Flag idea as inappropriate…  ·  Admin →

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    Adrian Ward commented  · 

    Also worth a mention: If you have access to an Apple Silicon Mac, try using AME Beta 22.1.1 - this problem doesn't seem to exist there. It still does exist on an Intel Mac using AME Beta 22.1.1 though. So probably not hugely relevant.

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    Adrian Ward commented  · 

    @Rashid Thanks for the thought. I do feel it is memory related, as if you increase the allocated memory to Adobe apps whilst AME is in the middle of a tortuous 8-hour render (the same one as I mentioned in my first comment) then the remaining frames briefly speed up again, the remaining estimation goes down whilst it uses up the memory boost, but this soon levels out again, so it's a brief reward.

    It would also explain why the first portion of the render goes quickly: this is using all the available RAM, and then it starts going slow when virtual memory use kicks in because too much memory is being used.

    That all this is caused by the presence of a few seemingly harmless expressions is a joke. My programmer's intuition is that the render engine does not cache the expression output values in an initial pass, and therefore every frame has to recompute each subsequent frame's current value afresh from the first frame. So for each new frame, that's an entire JavaScript context to setup, execute however many frames you've already rendered, then presumably not free the context and do it again for the next frame. Classic bad coding, there.

    Just guesswork, though.

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    Adrian Ward commented  · 

    Bumping this, as it's now 2021, After Effects 22.0.1 is out, and the same problem is happening all over again. If I strip all expressions/behaviours from a comp and render it, it's nice and quick... I mean a 6 minute sequence renders in about 10 minutes, which is about right. If I keep some basic expressions in place (okay, I'll be specific: Face In+Out - msec, and Wiggle - position, neither of which should be particularly taxing) my renders drop to hours (estimated around 7-8 hours).

    This is also happening on both Mac and PC.

    Adrian Ward supported this idea  · 
  2. 20 votes

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    3 comments  ·  After Effects » Performance  ·  Flag idea as inappropriate…  ·  Admin →

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