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Activity Forums Adobe After Effects How to change resolution

  • How to change resolution

    Posted by Petr Berger on April 1, 2011 at 9:39 pm

    I have some graphics in AE (from my friend) and its 720×576. I need to render it in HD. I know hot to change composition settings, but when I try to render it I still see 720×576 in render settings.

    Bogdan Bratu replied 15 years, 1 month ago 3 Members · 9 Replies
  • 9 Replies
  • Joey Foreman

    April 1, 2011 at 9:44 pm

    That sounds a bit odd. In any case I recommend the Scale Composition script. It’s located in File > Scripts.

    Joey Foreman
    Editor/Compositor/VFX Artist

  • Joey Foreman

    April 1, 2011 at 10:03 pm

    Dave’s right, if your comp contains any SD video or bitmapped graphics from Photoshop or whatnot. If it’s all graphics created in AE, the layers will scale uniformly without a loss in quality.

    Joey Foreman
    Editor/Compositor/VFX Artist

  • Petr Berger

    April 1, 2011 at 10:43 pm

    Yes, its PSD files (but result looks ok). The second problem is, when I render it in HD (HDTV 720) i’ll miss alpha channell.

  • Joey Foreman

    April 1, 2011 at 11:35 pm

    You need to render with a codec that supports an alpha channel (Animation, ProRes 4444,.tiff sequence, etc.)
    And in the Output Module set Channels to RGB + Alpha, Depth – Millions of Colors +.
    Were you specifically asked for an alpha channel? Usually that’s only necessary for something like lower thirds, as better compositing results will be achieved in AE than in an NLE.

    Joey Foreman
    Editor/Compositor/VFX Artist

  • Petr Berger

    April 2, 2011 at 12:06 am

    Its lower thirds, so yes.

  • Joey Foreman

    April 2, 2011 at 1:07 am

    In that case, you’ll most likely want to set the Alpha Channel type to Straight rather than Premultiplied.

    Joey Foreman
    Editor/Compositor/VFX Artist

  • Petr Berger

    April 3, 2011 at 10:08 pm

    I set it (color) as RGB, million color and straight and there is a message “you should also output alpha channel to use straight color” – where? I cant see it anywhere.

  • Joey Foreman

    April 3, 2011 at 10:10 pm

    RGB + Alpha
    Millions of Colors +
    The ‘plus’ is important.

    Joey Foreman
    Editor/Compositor/VFX Artist

  • Bogdan Bratu

    April 4, 2011 at 1:45 pm

    what is the visible difference between Rgb and Rgb + Alpha?

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