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cant set MXF interlaced to BFF (lower field first)

New Here ,
Jun 06, 2023 Jun 06, 2023

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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

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Error or problem , Export , Formats , How to

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Community Expert ,
Jun 06, 2023 Jun 06, 2023

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

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Contributor ,
Jun 06, 2023 Jun 06, 2023

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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.

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New Here ,
Jun 06, 2023 Jun 06, 2023

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

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Advocate ,
Jun 07, 2023 Jun 07, 2023

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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.

SamiSuccar_0-1686122123273.png

 

 

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Community Expert ,
Jun 07, 2023 Jun 07, 2023

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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.

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