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Activity Forums Adobe After Effects scale video to 200%, then output 50% =Quality 100%

  • scale video to 200%, then output 50% =Quality 100%

    Posted by Rudy Van os on May 13, 2009 at 8:15 am

    A quick simple question (hope it’s simple for you guys, because it isn’t for me):

    When in a sequence, I scale a video up to 200%, and then set the resolution settings in the render manager to 50% to output a smaller res video, will the quality of the original video be 100%? Or will AE take the 200% blown up video and render it down to 50%, losing even more quality?

    What if I put that same sequence in another sequence that is half the resolution and then render out a movie?

    Which one do you suggest?

    Cheers!
    Rudy van Os

    PS
    I guess I could do tests, but i want to know for sure and I am a bit low on time now, so any help would be much appreciated!

    Roland R. kahlenberg replied 17 years, 4 months ago 3 Members · 7 Replies
  • 7 Replies
  • Roland R. kahlenberg

    May 13, 2009 at 3:30 pm

    AE will take the 200% blown up video and render it down to 50%.

    Anytime you scale up, you enlarge the pixels; resulting in a pixelated image.

    HTH
    RoRK

    broadcastGEMs – AEPro Volume 02 (Professional Adobe After Effects Project Files – Now Available).

    Adobe After Effects Training in South East Asia.

  • Michael Szalapski

    May 13, 2009 at 4:54 pm

    Just out of total curiousity…why?

    – The Great Szalam
    (The ‘Great’ stands for ‘Not So Great, in fact, Extremely Humble’)

    No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.

  • Rudy Van os

    May 14, 2009 at 2:07 am

    Thanks for your response Roland.
    So even when I put my sequence in another smaller sequence, this happens right?
    Cheers
    Rudy

  • Rudy Van os

    May 14, 2009 at 2:15 am

    We are making a big size video that will be shown by combining 3 HD projectors to generate an image of 6604 by 1080 (though some pixels in between the screens will not be visible). I am still sending test files to the guy that does the projection, but we will likely decide on either showing a full res video or a half res one and scale it up with the projection software on the fly. We shot the footage in HD, and some shots will be scaled up to cover multiple screens. I wanted to know in case we would go for the 50% version.

    If I would make the 50% version first, then I would be scaling many shots down. Also the client insist that I make the “100% quality” version first.

    Any thoughts?
    Cheers
    rudy

  • Roland R. kahlenberg

    May 14, 2009 at 5:53 am

    [Rudy van Os] “So even when I put my sequence in another smaller sequence, this happens right?”

    It depends. If you don’t do anything else to the layer that involves scaling via Transforms or even an effect. BUT if you click on the Colapse Transformations switch/checkbox then you should be OK as long as the cumulative scale factor across the two or more compositions is less than 1.

    Like Michael, I’m curious as to why you need to scale up to 200% and then down again.

    I humbly suggest that you check out the book, Creating Motion Graphics with Motion Graphics if you’re seriously wanting to get into AE.

    Cheers
    RoRK

    broadcastGEMs – AEPro Volume 02 (Professional Adobe After Effects Project Files – Now Available).

    Adobe After Effects Training in South East Asia.

  • Rudy Van os

    May 14, 2009 at 6:29 am

    Thanks Roland!

    Please read my response to Micheal in which explain why I want to do this. If you have any suggestions, I would be very happy to hear them.

    BTW do you mean: Creating Motion Graphics with After Effects?
    Is that book detailed on those issues?

    It is probably a big shame on me, but I have actually been working with AE for a few years now, learning things as I work on jobs, never really had much time to read a book on it. It wasn’t even my intention to do motion graphics. It’s just that they keep asking me 🙂
    Enjoying it quite a bit though,… mostly.

  • Roland R. kahlenberg

    May 15, 2009 at 2:36 pm

    [Rudy van Os] “BTW do you mean: Creating Motion Graphics with After Effects?
    Is that book detailed on those issues?”

    It’s the most detailed book on AE. If you’re into video tutorials the then COW’s Master Series (more titles for intermediate users) and its affiliate, Total Training are all a click away – look at the training link above.

    Cheers
    RoRK

    broadcastGEMs – AEPro Volume 02 (Professional Adobe After Effects Project Files – Now Available).

    Adobe After Effects Training in South East Asia.

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