Proxy file clip

You chose ... poorly ... for your proxy format/codec. For two reasons, actually.

First, H.264 creates small files but makes the CPU and RAM work double-hard to recreate images in real-time. Avoid it nearly at all costs.

Cineform makes good quality proxies, normally handles alpha correctly, and isn't that big of a file. Try that instead. As an intraframe format/codec, where every frame is an actual, complete frame, it puts far less demands for playback on the system.

Now ... if you read the 'answer' for this thread by engineer Trent Happel, he gives specific instructions. You need to create a new encoding preset in MediaEncoder for Cineform with alpha, then from that create a proxy preset that Premiere would use to create proxies with alpha in that Cineform preset.

Read his answer ...

Neil

Hi there. first time posting in the forum so not sure if i should create new thread or not but My questino relates to the RGb + alpha . I have a macbook pro brand new with 32G ram and 2.3 8 core processor and using an SSD 2000mb/s esxternal hardrives for my project.     I am layering animation lossless RGB + alpha codec from my After Effects exports  and then editing with thtem  in my Premiere 2020 timeline . The alpha channel is impoortant but its my fist time integrating After Effects files into premiere.   The problem i am having is playback and constant rendering issues. Even when i have proxies enabled and low res. i make the smallest of changes to my timeline and the render line turns yellow , i my machine wont play back the yellow lines smoothly . its got to be green render line or otherwise i get tons of dropped frames.  So my editing is painful and i cant seem to be fluid and work fast.  Also want to add that when working on another sequence without the After effects lossless animatino files i am able to play and edit 4K video , making frequent changes to a 6-10 layer timeline and even when i get yellow render lines i still can play it back smoothly without having to rerender.... Any thoughts. ? I am not 100% if my proxy files i created for the Animation codecs i made with alpha channel display or not, not sure.   The Alpha channel is displaying correctly when i toggle proxy on and off, so i presume i usesd correct setting in creating my proxy, otherwise i imagine when proxy are enabled in timeline then i would lose the transparency if i had wrong proxy setting.. apprecaite anyones help very much.. let me know if you need further info from me.. many thanks shane

Thanks for the helpful insight Trent, and thanks you too Neil for your effort.

Kind regards.

Hmm, ok Neil, thanks for the reply, I hope some Adobe staff can answer and clarify if it's true or not. I'm trying to find a solution surfing the net. But for now I use a blend mode at least, just so I can place the video in it's correct timeline, so that's an option I guess.

Kind regards,

Here's some screen shots Neil, hope they can give some insight on what's happening.

On the 1st screen shot as seen my AE file is greatly large, so once I import it into Premiere I make it a proxy file H.264.

And Once the proxy file is created I click on and off the proxy button, once checked the alpha is lost, all I see is just black, only the original file maintains the alpha.

Hi Neil.

My AE comp was exported as a high resolution  AVI RGBA file, 3.5GB in total.  I didnt use as a dynamic link.

Was that still an Ae comp on your sequence?

Much of the time, if you have a comp 'finished' in Ae, rather than continue with a dynamic link Ae comp, it's wiser to export the comp out of Ae as a high-quality intermediate file, such as Cineform, DNxHD/R, or ProRes (last only if on a Mac) ... then replace the comp on your sequence with a standard video clip.

At that point, doing other things like adding more effects or creating proxies work quite well.

Neil