15 Replies Latest reply on Apr 4, 2014 6:24 AM by SAFEHARBOR11

    Resizing from HD to SD for broadcast

    Gobblor Level 1

      Hi all,

       

      I'm working on a full HD (PAL) comp that needs to go to air. But I'm having trouble with the downsizing from full HD (1920 x 1080p @ 25fps) to the digital format that the stations accept: 720 x 576 full height anamorphic (16:9) @ 25fps.

       

      When I put my HD sequence onto an SD timeline, I scale the size down to 54% - this fits the new frame and all should be fine in theory. But the export produces horrible aliasing. See screenshots below.

       

      The "Antialiasing" video effect in PP does nothing to remedy this. I've done a lot of Googling on it too, and it doesn't seem there's a simple solution in either Prem Pro or AFX to fix this!

       

      This is a frame from my original HD sequence - nice & crisp (zoom in fully):

      http://www.thepadman.eu/assets/img/hd_still.jpg

       

      And this is the SD frame after converting, with aliasing highlighted:

      http://www.thepadman.eu/assets/img/aliasing.jpg

       

      Any help would be great. Thanks.