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weird color problem and render crash
hi,
i got a 1920 scene. about 120 secs long
in the scene are 10 panels moving around which show looped videos. the source of the videos is also 1920.
there is a lot of movement, reflections and motionblur going on.once i am about 2 thirds into the scene and most of the panels can be seen at once onscreen, the rendering becomes very slow (this doesn’t concern me) and i get weird color errors. some of the looping videos on the moving panels become just green. (i doeblechecked, the source does not have this error)
mostly a few frames later the rendering stop with an error. error4 reading frame from file e:\bla\bla\seq_xx.mp4 86::2
i thought it might be a memory problem, since it only happens later in the scene when most of the panels are on screen at once and the rendering gets very slow.
i tried a few times rendering again – starting from the frame where the crash occured. but then the green shows up almost immediately and it still crashes.it seems to work fine if i put stills on the panels instead of movies.
any ideas? : )
win7, 8gigs, 2.4quad, cs4,
EDIT: i just rendered the scene using stills instead of videos. the rendering was lightning fast without any errors.
so i am pretty sure it’s a memory problem – but i don’t know how to fix this yet. -
6 Replies
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Sounds like a codec issue rather than a RAM issue … although 8Gb isn’t a ton of RAM, it should be enough. Also, if you have OpenGL on, you might try turning it off too.
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If the problem is related to the codec used in the source footage item, I recommend transcoding the source to an intermediate format and using that.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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Thanks a lot for all the suggestions.
I guess I’ll go for the reencoding… Dave’s in depth explanation made a lot of sense to me.My source material is 1920 AVCHD PAL
I edited it in Premiere to suit my needs and then encoded it to mp4 which i used later in After Effects which turned out to be a bad idea.Can anyone make a recommendation what coded and numbers most likely should work?
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I work on Macs and Win machines and prefer those same codecs for AE work on both platforms, though it also depends on your workflow … I sometimes use an Uncompressed codec out of AE when the hefty file sizes are less important to me than avoiding re-rendering in FCP.
By the way, sorry I didn’t mention the solution (transcoding) when suggesting the issue might be the source codec … figured that was implied.
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I guess I’ll take the uncompressed road then.
The clips are not too long. only about 15 secons eachthanks for your help guys : )
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If you have Render Multiple Frames Simultaneously on, you might try switching it off. I remember it was known to cause rendering errors in CS3. They might have fixed it.
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