Problem with rendering RGB + alpha

Adobe After Effects

Problem with rendering RGB + alpha

Posted by John Rich on February 22, 2008 at 5:02 pm

I have AE 6.5. I suddenly began having .AVI’s with alpha channel rendering with a flickering background with numerous flashing colors.
I did system restore, reinstalled 6.5 with no help.
No new programs, not hooked to internet, using 2 gigs RAM with AMD athalon FX 53,Nvidia GeForce FX 5500.

I tried several different projects which have previously worked and they do the same thing.
Rendering as Video for Windows with no compression. RGB + Alpha
Rendering with just RGB doesn’t have the flickering, etc.
Preview set to “off” in comp window.
Any help would be greatly appreciated.
Thanks in advance.
John Rich

John Rich replied 18 years, 2 months ago 58,187 Members · 3 Replies
3 Replies

John Rich
February 23, 2008 at 6:41 pm

Dave,
Thanks for answering. I had already set the “Rendering Plug-in” to “Advanced 3D” ie turned off “open GL hardware” in the advanced settings of the comp with no help so I changed to “standard 3D” and that didn’t help.

I then copied the project to another computer and it rendered out perfectly with alpha chanel, etc. This is a simple comp with text and fractal noise and glow applied (an Ayato.com).

I’m thinking it must be a hardware problem now, but do you have any idea where I should start with that?
Thanks in advance.
John

JOHNR
John Rich
February 26, 2008 at 1:03 pm

Dave,
The “non working computer” actually worked perfectly alpha channel and all up, for three years , up until about two weeks ago.

I’ll try the QT idea. Do you think it is possible for a codec to suddenly become corrupt and if so, is it possible to remove it and replace with a functional one?
Thanks,
John

JOHNR
John Rich
February 27, 2008 at 4:00 pm

Dave,
I feel like an idiot (my very first time LOL). As I mentioned when I rendered out Video for Windows using the uncompressed format I kept getting these flashing lights when I played back on Windows Media Player.

For some reason, I never tested the clips in Premiere. Today I did, and they play perfectly in Premiere with the alpha channel and everything.
I guess this must be a problem with Windows Media Player, and I’ll have to deal with that. Anyway, I think the AE is ok.

Thanks again for your help.
John

JOHNR

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