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Can’t export with alpha channel in Premiere Pro anymore?
I checked a ton of youtube videos and adobe’s forum, and it appears you can’t export video with an alpha channel anymore in PPro. There’s always the idiot or two who demonstrates how to do it with titles (which are already transparent!!!) or images, but no video.
What about the people who don’t have After Effects? Why did Adobe remove that feature? Or is there another hidden way (like they did with garbage mattes) of rendering video w/alpha channels?
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18 Replies
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Hi duke,
I’ve exported alpha channel footage just 2 days ago from Premiere. I usually use Prores 444 at 32 bits, or Quicktime PNG.
Make sure you choose at least 32 bits as your depth.
Vince Becquiot
San Francisco Bay Area
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Hey Vince. Thanks for responding. I guess you don’t know about me and my “work” 😉 I don’t shoot Prores, I shoot h264. I’m a total amateur, I just do this for fun. I did set my export depth to 32 bits. I tried Quicktime with “animation” codec (or preset?). I tried GoPro w/alpha. That didn’t even work. The quicktime produces a partially transparent background, like I’ve done a half assed key, for example. It doesn’t block out the garbage matte at all.
Is it because of my compressed h264 footage? I have no problem rendering with alpha channel out of After Effects.
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Hi Duke,
That’s odd, what version of Premiere are you on? I honestly never liked garbage matte, it’s pretty buggy and I never tried alpha exports with them.
On CC2014-2015, you have access to real masks (under opacity) that will work with alpha exports.
Vince Becquiot
San Francisco Bay Area
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Hey Vince,
I’m using PPro CC 2015 with the latest update. When I say garbage matte, that’s what I’ve always heard them referred to as. Remember, I’m just an old guy who plays around with this stuff as a hobby. I do use the mask under Opacity to create my, uh, garbage mattes 😉 -
Great, then you should be fine. Do try Prores 444 @ 32 as export, that always works for me.
Anything else on the timeline or effects that could be creating issues?
Vince
Vince Becquiot
San Francisco Bay Area
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No, I’m just trying a straight keyed out 10 second clip with just a LUT added in the Lumetri Creative panel. If your suggestion doesn’t work I’ll try removing the LUT and report back.
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EDIT: I just noticed that I do not have the prores option in my formats or presets. Will try quicktime again with no Lumetri LUT.
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ok, no go. Same result.
This is what it looks like in PPro, and the rendered result grabbed from Media Player
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Sorry for the multiple posts, there doesn’t seem to be an edit function here. Anyway, I just tried keying and rendering another clip that I shot the other day but I got the same result so it wasn’t a problem with the clip I had been using. Don’t pull your hair out trying to figure this out. I can still render out of After Effects. Plus I’m pretty sure it must be the compression of the original h264 video file that’s causing the problem.
Cheers! -
i just did an image sequence the other day with PNG sequence with alpha channel(millions +(the plus sign). you can set as straight or premult.
the advantage is that you won’t lose any quality. I’ll check the other codecs and see if there’s any bugs! there just might be…
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