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Forums Adobe Premiere Pro How to avoid scaling twice after rotation?

  • How to avoid scaling twice after rotation?

  • Peter Wu

    July 18, 2016 at 4:10 am

    I have to rotate a video by 1.1 degree because it is not level. Then I zoom in to 103% to crop out the black corners.
    The source is HD 1920 x 1080 and the output encoded video is 1536 x 864.
    This results in the video being scaled twice, first from 1920 x 1080 to 103%, then to 1536 x 864 during encoding.

    Is there a way to make only one scaling operation to reduce the blur introduced by scaling?

    I’m using premiere cs4.

  • Alan Lloyd

    July 18, 2016 at 5:24 pm

    Export the rotated and slightly up-resed clip to something comparatively “lossless” and use that.

    Lagarith or CineForm, maybe, at a good high bitrate, and possibly (depending on the content) a touch of sharpening applied should help.

    And yes, as Dave comments, your export dimensions seem somewhat unusual. What’s the output headed for?

  • Peter Wu

    July 18, 2016 at 6:03 pm

    It’s for youtube. I don’t want to upload the full 1920×1080 for several reasons:

    – I want a smaller file size than HD so the upload go faster
    – after rotation, the video no longer has 1920 x 1080 effective resolution so why waste the file size and give false expectation to audience

    1280×720 is probably a more common resolution, but is a little too low so I pick something in the middle. Is there a better choice?

  • Alan Lloyd

    July 18, 2016 at 8:06 pm

    Does YouTube even have a 1536 x 864 setting? (I have not seen one.)

  • Tero Ahlfors

    July 18, 2016 at 8:12 pm

    Just use standard resolutions like 720p. You’re not gaining anything from that weird resolution.

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