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HD to SD for Broadcast
Hi Everyone,
I’m having a problem with getting HD material to look good after a SD render.
I take the HD footage, sit it in a PAL Widescreen timeline and scale it to 55%.
When it renders, the footage itself looks OK, its just dissolves, fade to whites etc that jitters, like a field problem. Of course, the HD is UFF, and the render is LFF, but I have never had a problem with this render solution in After Effects. Can someone perhaps point me towards a better workflow?
Thanks in advance
SimonYou know I’m born to lose, and gambling is for fools, but that’s the way I like it, baby. I don’t want to live forever!
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3 Replies
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The sd timeline should be set to upper field first too – that might be your issue. Also 55% will mean you loose a bit of your frame. I usually scale 1080 to 53.5% in sd in fcp7 but in Pr you need to do the x and y scale separately with different % for each, just experiment till you don’t see any black or blurring on the edges. I add 2.5 Gaussian blur too to take away any edge buzzing – especially with 1080p downres,
Cheers, Mike
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Keep the HD footage HD, in a matching HD sequence. When you export to SD, the scaling takes place there, no need to create an SD timeline first.
In AME, check the box for “Max Render Quality” and that helps with the downscale. In AME output preview window, if there are slim black bars at the sides of export video, change “Scale to Fit” to “Scale to Fill”.
Thanks
Jeff Pulera
Safe Harbor Computers -
Yes…what Jeff said.
Let the Media Encoder do the scaling during the export.
TimK,
Director, Consultant
Kolb Productions,Adobe Certified Instructor
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