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Very Slow Motion Track!

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Brett PutmanVery Slow Motion Track!
by on Mar 12, 2010 at 5:41:48 pm

So, I am doing a basic motion tack in AE using only one tracking point.
No rotation or scale tracking points, only postion.

Doing this is tacking forever for some reason. In order for AE to find and create a single track point, it takes about 30 sec a frame, which is, of course, way too slow.

There must be a simple setting in AE that I am missing that could solve this.
If you know, then please share your knowledge.

THANKS!


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Dave LaRondeRe: Very Slow Motion Track!
by on Mar 12, 2010 at 5:59:55 pm

I'll bet it's the kind of footage you're working with that's the problem:

Dave's Stock Answer #1:

If the footage you imported into AE is any kind of the following -- footage in an HDV acquisition codec, MPEG1, MPEG2, AVCHD, mp4, m2t, H.261 or H.264 -- you need to convert it to a different codec.

These kinds of footage use temporal, or interframe compression. They have keyframes at regular intervals, containing complete frame information. However, the frames in between do NOT have complete information. Interframe codecs toss out duplicated information.

In order to maintain peak rendering efficiency, AE needs complete information for each and every frame. But because these kinds of footage contain only partial information, AE freaks out, resulting in a wide variety of problems.


Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Brett PutmanRe: Very Slow Motion Track!
by on Mar 12, 2010 at 8:50:52 pm

The footage I am working with was shot on a 5D and I know that it shoots in H.264, but I have tracked to footage shot on the same camera using a different Mac Pro and it worked out fine. Also, the footage that is being tracked to in AE has been exported from FCP as ProRes 422, so I dont believe that the lack of information in some frames would still be an issue.

Maybe I am just experiencing a persisting hardware issue?


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Dave LaRondeRe: Very Slow Motion Track!
by on Mar 15, 2010 at 5:39:55 pm

You may be trying to use multiprocessing without sufficient RAM:
http://blogs.adobe.com/toddkopriva/2009/12/performance-tip-dont-starve-yo.h...

If you do have sufficient RAM, you may be trying to use too many processors:
http://blogs.adobe.com/toddkopriva/2010/03/performance-tip-dont-oversched.h...

You may be trying to use Open GL, which is rarely useful for rendering, so turn it off.
And you may not have the free upgrade to AE 9.02, which you should get.

If the footage is okay, these are common causes for lack of AE happiness.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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