Embedding alpha channel in exported annimation? at DVinfo.net

Bob Drummond · July 7th, 2010, 09:00 AM

Hi guys. Using CS5. I have Premiere Pro and After Effects, but I'd rather do as much as I can in Premiere as I know it much better.

Here's my situation: I've rendered an animation as a series of still images. The frames are 24 bit and do not have an embedded alpha channel. I did however render a separate sequence of images which is just the greyscale alpha images.

My question: Using Premiere (or failing that, After Effects) when I encode a video file of the animation, can I embed the alpha image sequence as the alpha channel of a 32 bit animation file? if so, how? I can't seem to figure it out.

Ann Bens · July 7th, 2010, 11:16 AM

Rendering at Max Depth will give you the Alpha Channel.

Bob Drummond · July 9th, 2010, 02:32 PM

Thanks, Ann. What I meant was how do I tell Premiere that the separate greyscale sequence IS the alpha channel.

July 7th, 2010, 09:00 AM	#1
Bob Drummond Regular Crew Join Date: Mar 2007 Location: Cincinnati, OH Posts: 161	Embedding alpha channel in exported annimation? Hi guys. Using CS5. I have Premiere Pro and After Effects, but I'd rather do as much as I can in Premiere as I know it much better. Here's my situation: I've rendered an animation as a series of still images. The frames are 24 bit and do not have an embedded alpha channel. I did however render a separate sequence of images which is just the greyscale alpha images. My question: Using Premiere (or failing that, After Effects) when I encode a video file of the animation, can I embed the alpha image sequence as the alpha channel of a 32 bit animation file? if so, how? I can't seem to figure it out.

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July 7th, 2010, 11:16 AM	#2
Ann Bens Major Player Join Date: Jun 2007 Location: The Netherlands Posts: 710	Rendering at Max Depth will give you the Alpha Channel.

July 9th, 2010, 02:32 PM	#3
Bob Drummond Regular Crew Join Date: Mar 2007 Location: Cincinnati, OH Posts: 161	Thanks, Ann. What I meant was how do I tell Premiere that the separate greyscale sequence IS the alpha channel.