cant set MXF interlaced to BFF (lower field first)

[peterv22399761]

Hi,

I need to export a documentary movie for a TV broadcast. Their requirements are:
• HD 1080i/25
• 1920 x 1080
• interlaced, bottom field first (BFF)
• 25 frames  / 50 fields per sec
• 16:9 or 21:9
• 4:2:2
• 50 Mbps (CBR)

The problem is there is no option to set the bottom field first for MXF. Why? Am I doing something wrong?
I can only set it for upper (or progressive).

I remember that it was possible in older releases of Premiere, but I may be wrong. 

It is possible to set BFF when I am exporting to prores, but they want MXF...
Thanks for help
Dominik

[Ann Bens]

Kind of odd as upper field is usuallly the way to go with interlaced HD footage.

[smrpix]

You can export ProRes 25i MXF BFF through Adobe Media encoder. 

But I have the same concern as Ann, BFF is extremely unusual for broadcast.

[peterv22399761]

It is strange, I know, but that's what they want and as it seems Premiere is incapable to do it. 

[Sami Succar]

Under format, select Apple ProRes MXF, and you can change the field order there. MXF is only a container, so if they didn't specify which codec they want, you can safey use the Apple ProRes MXF 422 HQ.

[Remote Index]

Sami Succar,

Note the requested specs are 50 Mbps (CBR) and ProRes is a VBR codec (though ProRes Proxy should get you under 50Mbps at 25fps HD).

R.