jaggies along alpha edges

[Ben Insler]

I have no experience with the AVID, but my first guess is a premultiplies vs. matte alpha interpretation issue. Maybe AVID is expecting one and you’re outputting from AE with the other?

What file type are you rendering out to?

-Ben

Ben Insler
Editor
Telemark Films

[Steve Roberts]

Avid likes images with straight alpha.

Technically, the RGB is straight or premultiplied, but everybody calls it “straight vs. premultiplied alpha”. 🙂

SR

[Joe Feng]

I’m rendering the alpha as premultiplied, because when rendered as straight, the result looked like Devil himself…and was totally unacceptable.

The files are uncompressed QTs.

[Steve Roberts]

Did you try importing that into Avid?

The result will look like trash until it’s imported into an app that recognizes it. Then it will look fine. 🙂

Steve

[Joe Feng]

Yeah, that’s what I was hoping too. But the importing didn’t make it look any different.

[Don Days]

Are you taking them into the Avid uncompressed? Usually if I’m taking in something with an Alpha I’ll try to keep it uncompressed on the import or at least 2:1.

[Joe Feng]

I’m taking them in uncompressed.
Should I be using a different codec other than uncompressed out of AE? I’ve also tried animation and Avid Meridian Uncompressed. Both had similar results.

[Don Days]

Not sure on what you are using for elements in your graphic but if you are using any video elements or pre-rendered animations, make sure your footage is interpreted correctly in AE (make sure your fields are separated). Can you post any stills of the problem?

[Joe Feng]

All the elements are exported from either Illustrator or Photoshop, no videos or prerenders…What’s the best way to post stills up here? Thanks.

[Rambobaby]

Here is the text straight from After Effects help files:

After Effects 6.5 lets you output to the OMF (Open Media Framework Interchange) format to generate Avid media essence files. Each OMF codec has a fixed frame size and frame rate, depending on the output resolution you choose. The OMF file format doesn’t support audio, so any audio tracks aren’t converted, but you can output audio tracks separately, if desired.

Note: You can also import OMF files. (See “Importing OMF files (6.5)” on page 84.)

To output a composition to OMF:

1. In the Render Queue window, click the Output Module template name to launch the Output Module Settings dialog box.
2. From the Format drop-down box, select OMF.
3. Click Format Options. Choose a format (NTSC or PAL), AVR (Avid Video Resolution), and OMF version.
Note: OMFI version 1.0 is supported for backward compatibility with older Avid systems.