Skip to main content
ti.s.cavalcanti
ti.s.cavalcanti
Inspiring
January 22, 2015
Answered

How to render Alpha + RGB in Adobe Media Encoder?

  • January 22, 2015
  • 3 replies
  • 297708 views

I want to render a video.

Alpha;

RGB;

Alpha + RGB;

I can do in After Effects:

How to do this in Adobe Media Encoder?

This topic has been closed for replies.
Correct answer Kevin-Monahan

Hi Ti.S. Cavalcanti,

You have to make sure to set the bit depth to 32 bits. Note that only specific codecs allow you to do this.

Thanks,

Kevin

3 replies

M
matthewjm
Inspiring
October 26, 2020

None of the cedec presets in Media Encoder seem to offer 32 bits as an option. Does Media encoder do transparency?

    H
    Herley Alencar
    Known Participant
    July 17, 2016

    Well, I've found a different solution. In Media Encoder, I changed the format to quicktime, then in video codec, to PNG. Done. My videos with transparency in avi were almost 2gb. Now have only 20mb, and with the same quality

      ti.s.cavalcanti
      ti.s.cavalcantiAuthor
      Inspiring
      August 5, 2016

      Very good, thanks!

      Kevin-Monahan
      Community Manager
      Kevin-MonahanCommunity ManagerCorrect answer
      Community Manager
      January 22, 2015

      Hi Ti.S. Cavalcanti,

      You have to make sure to set the bit depth to 32 bits. Note that only specific codecs allow you to do this.

      Thanks,

      Kevin

      Kevin Monahan - Sr. Community & Engagement Strategist – Pro Video and Audio
        ti.s.cavalcanti
        ti.s.cavalcantiAuthor
        Inspiring
        January 22, 2015

        What happens if you put more bits? 48 or 64 for example.

        What if I want to render only alpha, how do?

          ti.s.cavalcanti
          ti.s.cavalcantiAuthor
          Inspiring
          January 23, 2015

          Can you maybe explain a bit more about the workflow, what you wish to accomplish? When you say "just alpha", can I assume you mean a black and white image representing transparent and opaque areas? Which can be used as a "mask" later in a keying operation of some sort?

          With older versions of Premiere such as CS6, one could change the Program Monitor settings from Composite to Alpha, then Export the alpha (black/white) video. With CC, that is no longer the case from what I can tell. Changing to Alpha mode shows the black and white alpha in Program, however exporting still exports the original image! In my mind, the Export should export what I am seeing in the Program monitor window, and not something else...

          Anyway, if you are using the Ultra Keyer in Premiere CC, then you CAN Export the alpha, see attached pic. Key out the background of the clip, then change setting from "Composite" to "Alpha" and then Export. In the top example, if you Export from the timeline and choose a 32-bit codec (with alpha) for the export, then the alpha channel is included - the black area will be transparent. With the lower example, that would just be a 24-bit image, no alpha - the black and white areas represent transparent and opaque parts of the clip. The clip exported from the bottom could then be used as a "mask" layer to combine two other video clips using that mask clip as a guide. Please elaborate on what you want to do.

          Thanks

          Jeff Pulera

          Safe Harbor Computers


          I want to do in "AME", the functions that have After Effects.

          Are they?

          RGB - Opaque = Colors / Transparent = black.

          Alpha - Opaque = White / Transparent = Black.

          RGB+Alpha - Opaque = Colors / Transparent = Transparent.

          As in After Effects.

            Terms & ConditionsAccessibility statement
            Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices