Codecs with Alpha Channel
mark last edited by
Dear Raha,The photo-jpeg codec has no "built-in" alpha channel -- in other words, the alpha cannot be encoded into the movie as it can with the PNG+ and Animation codecs. You can however create add alpha information to a video stream coming from a Photo JPEG movie by using the "Add Alpha Channel" actor. But this usually only helpful if you intend to add a fixed mask. If you want to have your image use a "traveling mask" (i.e., where the mask is moving in sync with the main image) then you need to use the codecs described by vanakaru.Best Wishes,Mark
raha last edited by
Hi Marki haven't gotten into traveling masks....so that method works for me...regarding Vanakuru's comment "Animation with alpha is out of the question" -- is this true? there's no codec that allows for animation to retain transparency?
I think vanakaru meant is, its out of question because of its heavy cpu load. Animation does support alpha channel.
CitizenJoe last edited by
Does anyone know if there's a "best" option for Windows?
I would suggest testing the DXV codec on Windows.. It seems that the free version should support alpha.
@Dusx as much I know the alpha is supported ONLY through Resolume the same as better performance.
OK< just did a quicktest and I have a DXV quicktime running in Izzy with alpha.
Just select 'preserve transparency' in the quicktime codec settings during export.
I have a test file that is 10 seconds 30fps 640x480 @ 17.6 mb
Seems to run smooth for me, once I set izzies framerate to match the video.
PS: note Izzy can't be YUV mode
I tried DXV again(after some years+downloaded the latest codec) and indeed it works very well. I have seen reports of better performance that with PNG+. Even the file is smaller that PNG+.When exporting from AE you need to choose RGB+Alpha and then Millions of Color+ along in codec settings to preserve alpha.
Glad its working for you.. seems like the best alpha option right now.