Secret preferences information?

[Steve Roberts]

Try setting it to purge every 5 to 15 during Make Movie. If you set it too high, you might crash as your RAM fills up. If too slow, your renders might take longer than you want as cached frames are purged and have to be re-rendered. So watch your RAM usgae in whatever utility your OS uses, and keep your RAM usage high, but not so high it maxes out and you crash.

You have to experiment with this.

[Darby Edelen]

Also if you’re using motion blur make sure you don’t make your purge setting too low, AE uses previous (cached) frames to generate the motion blur.

[Steve Roberts]

Then there are those time-dependent effect like echo, that do the same thing. Good call.

[Kevin Camp]

can you better define ‘jerky renders’? i’m not sure that purging frames at set intervals would smooth out a jerky animation… is it the entire render that looks jerky? is it a physical position change of a layer or effects on the layer that is creating the jerkiness? are you rendering interlaced or progressive?

Kevin Camp
Designer – KCPQ, KMYQ & KRCW

[Don Logan]

Thanks for the info.

Do you guys have an actually safe bet number that I should set this to?

Right now it is set to

disable layer cache is unchecked

purge every 0 frames during make movie

ignore sequence rendering error is unchecked

I tried to output a 10 sec 3 layer comp with a Psunami wave effect, a Trapcode shine effect, and a solid.
It won’t play right in AE or look right in QT.

Not sure why? I have 3 gig of RAM. So here is another question. Should I edit my Boot.ini file, I looked it up on the forum and read…proceed with caution, not recommended, so that scared me off.

Thanks for the help

rd

[Steve Roberts]

O means you’re not purging at all. If more than your available RAM is required to render a comp, you will crash when set to 0.

There is no safe bet number, since all comps and machines are different. Start with 5. If it crashes, go lower. If it works and the render is too slow for your taste, go higher.
Leave “disable” unchecked and “ignore” unchecked.

Secret setting do not affect the appearance of the rendered video at all. They affect two things:
1) how long it takes to render that file and
2) whether your machine will crash or not when rendering.

The file that plays badly: what codec? What frame size? What frame rate?

[Kevin Camp]

you can try around every 10-15 frames. but usually you will only need this when ae crashes during rendering (especially if you notice the ram usage hitting 100% during the render). i’m not sure using the purge frame setting is actually going to give you a better render, it would just allow you to get a render, and usually sacrificing speed to some degree.

can you tell us more about you system and what version of ae you are using?

Kevin Camp
Designer – KCPQ, KMYQ & KRCW

[Darby Edelen]

[Steve Roberts] ”
O means you’re not purging at all. If more than your available RAM is required to render a comp, you will crash when set to 0.”

I don’t believe this is necessarily true. 0 is the default setting. At this setting I’m almost positive that AE purges RAM as is required during a render to keep the RAM Cache below your maximum setting (Default is 60% I believe).

[Don Logan]

When I play back the Quicktime movie it seems that it has skipped certain frames and does not play smoothly. I did right click on the movie file and can’t find info about the codec etc. When I rendered it I used RGB+Alpha, millions of colors, premulitplied alpha. project link was embedded. There was no audio in the comp.
The movie is 6 seconds long, one layer on the time line with 1 psunami effect. I knocked down the length and layers to see if it would improve and it has not.

My machine is AMD 4400 dual core, 3gb ram, Nvidia 7900gt, 10,000rpm raptor drive running Win xp sp2. I have minimal services running and this is the first time I have had a problem like this?

Thanks for the info/help

rd

[Steve Roberts]

Try opening the file in QT player and hitting ctrl-J to get the codec and data rate.

And you can find the codec as set in the AE Output Module. What does it say there under Format and Output Info?