1080i/50, 16:9 silly question, hopfully simple answer

[Sanch3z_77]

I've been asked to provide a motion graphic to the follow specification:
1080i/50, 16:9
What framerate should I use when creating my composition and is there anything I need to specifically do when rendering the video?

Thanks in advance.

[Anna Lander]

this specification is to render video for TV.

1080i 16:9 — just use preset HDTV 1080 25 (1920x1080 px, 25 fps).
BUT when render, open render settings and change Fields option in Video section: choose Upper First.

[Sanch3z_77]

Massive apologies in missing this response after you took the time to answer my question. I appreciate your time.

So this is a pretty standard request and I shouldn't be overly concerned with producing something to this specification? Everything i've done to date has been for online usage so whilst i've created it HD i've never been supplied with a delivery spec before.

I was concerned I was entering into some complex blurring, interlacing territory and was going to trip up...?

[Sanch3z_77]

Sorry just following on from this, you say set up at 25 fps. Does exporting it with fields set to upper first give you a 50 fps file as requested or do I also need to give a custom frame rate of 50 FPS?

Thanks