I'm not much of an expert on Avid codecs because I've not used them in about 10 years but I can tell you that you shouldn't be encoding anything you want to use for more than a test with AE's render Cue and h.264. It does a lousy job. I'm not sure why you AME is having memory problems unless it is directly relate to the DNxHD codec. The AME is the best choice for h.264. Just make sure that all your Adobe apps are up to date.
By intermediate files I take it that you're trying to render stuff to your Avid codec so that Avid doesn't have to re-render them. If you're moving files from Premiere to AE and rendering intermediate files from PPro then I'd suggest a different workflow is in order. It doesn't sound like you're going from Avid to PPro.
I know it's late in the game, but I've been using the Black Magic production codecs for years on the Mac with no problems. They are also available on Windows. I didn't see an Avid editing system in your pipeline so I'm wondering why you feel tied to this codec?
I hope this helps a bit. Maybe someone with more knowledge about the Avid codecs will chime in with a better solution.
Hello Rick, thanks for your fast reply.
Indeed, I try to avoid to render h.264 within AE.
And, I dont have any Avid application in my workflow, but I think that the DNxHD is quite a good intermediate, even between PC and Mac. Its performance is good even on my older laptop and file size is good, too.
I tried some other codecs, but none of them were good enough for a cross platform workflow (e.g. lagarith, prores, matrox).
Nevertheless, I will give the blackmagic codecs a try. They are included with the Resolve lite, which just released for Windows. And also a trial of Cineform.