3 Replies Latest reply on Apr 24, 2012 5:54 AM by musarticus

    Creating Transparent Videos

    curtdbz2

      Hello, I would like to create video with transparencies.  You know how a PNG file can have the background transparent, and only some parts opaque?  Can the same thing be done for videos?

       

      What I would like would be to create a file in After Effects, that I can export to MPG, AVI, or some other format, which I can then import into Premiere and by having that clip on a video track above another clip, it will overlay itself with transperancies on the clip below it.

       

      Do you know what I mean?  I hope I explained that coherently!  Please let me know if there is a way to do this, without chroma key'ing in Premiere.

        • 1. Re: Creating Transparent Videos
          Mylenium Most Valuable Participant

          Can the same thing be done for videos?

           

          Sure, people do it all the time. It's just a matter of choosing the right export format, i.e. one that supports Alpha channels (Quicktime Animation and PNG, TIFF; TGA; PSD;PNG image sequences etc.). Read up in the help.

           

          Mylenium

          • 2. Re: Creating Transparent Videos
            curtdbz2 Level 1

            Oh my god!  Finally!  I was able to do this.  I've been trying to figure this out for SO long now.  So Mylenium is right in that you need to use Alpha channels, but I'll explain more fully for people who also have this problem and hate the "read help page" type of "help".

             

            When you're exporting your video, choose AVI and then in the codec settings area, make sure to switch it from RGB to RGB+Alpha.

             

            The part that really threw me off was that I am used to photoshop where it tells me that the background is transparent by using little alternating grey/white squares.  So I was looking for something like that to appear in After Effects to tell me explicitly which parts will remain trasnparent, and which won't.  However, at least from what I can tell, there is no such thing in After Effects.  That initial background you create when you make your sequence, THAT's the part that will be transparent.  I hope this helps.

            • 3. Re: Creating Transparent Videos
              musarticus Level 2

              Actually, there is a Toggle Transparency Grid button at the bottom of the Composition Panel that will allow you to see the checkerboard in areas that are transparent.