Premiere-AE workflow questions at DVinfo.net

Warren Morningstar · March 28th, 2008, 12:00 PM

There must be a better way than what I'm doing right now. I have Cineform encoded green screen clips that I first rough cut in Premiere. I then export the timeline as a CineForm High HD optimized .avi and import into AE so I can cut the key. I then bring the matted footage back into Premiere so I can add my backgrounds and graphics. (I don't do that in AE because I haven't figured out how to make enough of the clip play real time with audio so I can time my graphics). I render in AE as Video For Windows RGB+alpha straight (unmatted). I've tried rendering as CineForm AVI RGB+alpha, both premultipled and straight, but Premiere doesn't seem to recognize the alpha channel on the Cineform AE renders. Any suggestions on how to streamline this gratefully accepted.

David Newman · March 28th, 2008, 02:14 PM

Alpha channels only supported with Prospect 2K/4K and NEO 4K. The workflow questions I less sure about. Won't Dynamic link help you somewhat?

Warren Morningstar · March 31st, 2008, 06:32 AM

Thanks for the response, David. I guess I need to consider upgrading.
Does raise a question, though. Why does the menu offer the option of rendering with an alpha if the software doesn't support it?

David Newman · March 31st, 2008, 09:05 AM

It shouldn't, we will need to check out that (it is support to be ghosted on the HD products.)

March 28th, 2008, 12:00 PM	#1
Warren Morningstar New Boot Join Date: Mar 2008 Location: Frederick, MD Posts: 10	Premiere-AE workflow questions There must be a better way than what I'm doing right now. I have Cineform encoded green screen clips that I first rough cut in Premiere. I then export the timeline as a CineForm High HD optimized .avi and import into AE so I can cut the key. I then bring the matted footage back into Premiere so I can add my backgrounds and graphics. (I don't do that in AE because I haven't figured out how to make enough of the clip play real time with audio so I can time my graphics). I render in AE as Video For Windows RGB+alpha straight (unmatted). I've tried rendering as CineForm AVI RGB+alpha, both premultipled and straight, but Premiere doesn't seem to recognize the alpha channel on the Cineform AE renders. Any suggestions on how to streamline this gratefully accepted.

March 28th, 2008, 02:14 PM	#2
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	Alpha channels only supported with Prospect 2K/4K and NEO 4K. The workflow questions I less sure about. Won't Dynamic link help you somewhat? __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

March 31st, 2008, 09:05 AM	#4
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	It shouldn't, we will need to check out that (it is support to be ghosted on the HD products.) __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman

March 31st, 2008, 06:32 AM	#3
Warren Morningstar New Boot Join Date: Mar 2008 Location: Frederick, MD Posts: 10	Thanks for the response, David. I guess I need to consider upgrading. Does raise a question, though. Why does the menu offer the option of rendering with an alpha if the software doesn't support it?