When you add an AEP file to a Premiere project AE has to open in the background to render the work done in AE. There's no other way to get the pixels rendered. Simple as that. The amount of time it takes something to render in AE depends entirely on what you are doing in the AE project. I often have projects that take several minutes per frame to render because I often do very complicated composites in AE. I would never use Dynamic Link to embed one of these complex shots in Premiere Pro as linked AE project, I would render a suitable digital intermediate (DI) using a suitable mezzanine format (look it up) and use that rendered movie in Premiere Pro as the source for that shot. Dynamic link is just not useful at all for long shots or sequences that have complex effects added.
Without knowing the details of your AE project, the format you are choosing to render to and the details of your source footage it's impossible to tell you if 2 hours to render a 15 second shot is unusual for a computer with your horsepower. I sent a seven second shot out to be rendered yesterday that took about an hour and forty five minutes to render. 210 frames / 105 minutes is about thirty seconds a frame which I didn't think was too bad for the shot I was creating. If I had put that AE comp into Premiere Pro as a dynamically linked comp it probably would have taken twice as long to render. On the other hand I use dynamic link all the time for lower thirds with live type in PPro and they don't have hardly any effect on render times.
thanks for the reply will have a look at a mezzanine format.
I have been using my ,above described method, for about two years now and yesterday when I had to render my ads the problem started.
I do about 4-3 small 15 second TV ads per week some are complicated, others not as much.
My more complicated comps usually take about 8-10 min to render on my PC
my source files are mostly moving png's and images I rarely have video files that I use in the comp.
I render them in a quicktime format
video codec H.264
maximum render quality is used
bit rate is at 15 000 kbps
I see now there is a upgrade for after effects hopefully that will help with the problem I will keep you updated.
I have had some weird problems with adobe since upgrading to windows 10
Did you ever find a solution here?