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How to avoid scaling twice after rotation?
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.
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4 Replies
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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?
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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 audience1280×720 is probably a more common resolution, but is a little too low so I pick something in the middle. Is there a better choice?
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Does YouTube even have a 1536 x 864 setting? (I have not seen one.)
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Just use standard resolutions like 720p. You’re not gaining anything from that weird resolution.
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