ADOBE AFTER EFFECTS: Forum Expressions Tutorials Podcasts Creative Cloud

1080i50 the same as 50herz? (graphics)

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
John Mark1080i50 the same as 50herz? (graphics)
by on Jul 17, 2013 at 1:42:39 am

Will making graphics running at 1080i50p play well on a external HD tv running at 1080i50herz?

If I am incredibly confused please tell the correct format I should use. I aiming for that smooth look.

A News Graphic Lover

Return to posts index

Angelo LorenzoRe: 1080i50 the same as 50herz? (graphics)
by on Jul 17, 2013 at 10:45:38 am

You're throwing around a lot of i's and p's, way more than what makes sense.

50i in HD is really the same as standard definition PAL 25i. It's 50 fields per second, or 25 interlaced frames. Why we've decided to switch to this naming convention, I don't know.

25p is 25 frames per second, and 50p is 50 frames per second.

You have two choices:

You can convert 25p to 50i by splitting it in fields, so each even and odd field from from the same frame.

You could also convert 50p to 50i by throwing away half of the vertical resolution so each field comes from a unique frame, just as a 50i camera would record it.

It depends on if you want to prioritize size resolution or time resolution.

Angelo Lorenzo

Need to encode ProRes on your Windows PC?
Introducing ProRes Helper, an awesome little app that makes it possible
Fallen Empire Digital Production Services - Los Angeles
RED transcoding, on-set DIT, and RED Epic rental services
Fallen Empire - The Blog
A blog dedicated to filmmaking, the RED workflow, and DIT tips and tricks
Can your post production question fit in a tweet? Follow me on Twitter

Return to posts index

John MarkRe: 1080i50 the same as 50herz? (graphics)
by on Jul 18, 2013 at 3:36:06 am

Thank you for the reply. My clips are at a frame-rate of 25fps. They play perfectly via Black Magic's UltraStudio mini monitor (to a tv display at 1080i50) I want to then overlay graphics over the video using the ATEM TVS. So how can I make my graphics run smoothly. I don;t want them at 25fps, I might not get the smooth look I'm looking for.


A News Graphic Lover

Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2016 All Rights Reserved