Exporting Premultiplied Alpha from Premiere

Forum|Forum|7 months ago
August 27, 2025
2 replies
257 views

I need to generate premultiplied alpha exports from a Premiere sequence. Recommendations on how to do this? If I generate ProRes 4444 w/ 16bpc+Alpha they are always Straight/Unmatted. In AE this is selectable, how do you switch to premultiplied in Premiere?

Correct answer Sumeet_Kumar_Choubey

In Premiere Pro, you won't be able to export a video in Premultiplied alpha, but you can export ProRes 4444 in Straight alpha from Pr and then transcode it to ProRes 4444 Premultiplied alpha in After Effects. I hope it helps.

Thanks,

Sumeet

S

Sumeet_Kumar_Choubey

Community Manager

Hi bb28142042,

We're sorry about this. Currently, in Premiere Pro, you can't export premultiplied alpha in ProRes. You'll need to use After Effects for that.

Thanks,

Sumeet

bb28142042Author

Participant

@Sumeet Kumar Choubey is there a different codec that supports premultiplied in alpha? Also, can you confirm if a straight/matted prores is exported from premiere and transcoded into premultiplied alpha using After Effects that it will be correctly premultiplied?

R Neil Haugen

Legend

I don't think Premiere can create pre-multiplied alpha channels ... as that's been an irritation of a rather small group of highly technically experienced users for quite some time.

One always needs to go to Ae for that sort of thing.

Everyone's mileage always varies ...

R Neil Haugen

Legend

I don't think it's an option in Premiere. Which it should be.

Everyone's mileage always varies ...

bb28142042Author

Participant

does exporting a straight alpha from premiere and transcoding it in AE to a premultiplied alpha achieve the same result?

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