Hi,

OK I totally get there's no 4K export. And if there is and I missed something, it's irrelevant because I'll be posting to Vimeo.

So I need to export in 1080.

I've done the 4K edit and am ready to export.

Go to 'Format' and switch down to 1080.

All good, except now the scrren has 'stretched' southwards. The faces look longer. It's wrong.

Clearly 4096x2160 and 1920x1080 are not commensurate in ratio. 1080 is squarer. 

Is there a way round this?

Or do I need to go into the 1080 edit, add a mask and squeeze the faces back to correct sizes?

J x

UHD is 3840 X 2160 which is exactly 4 times the 1920 X 1080 frame size that you are trying to export.

Denny

Hi there,

Yes I totally understand, but the material was initially shot in full 4K which is 4096x2160.

So even if I reimported in UHD the same issue would apply - the frame is too short on the X axis. 

Sounds like I'll have to 'push' the HD material back into shape using 'Resize/Scaling' then apply a small mask.

If so, does anyone know by what ratio, ie what percentage to subtract on the 'Y'?

Or is there another way?

Cheers,

J

Just a guess. I would prefer to loose a little from each side and maintain the vertical sizing. So my quick maths suggests reformat 4K project to HD. Expand the horizontal scaling by multiplying by 1.0667. You will end up loosing roughly 64 pixels from the each side.

(Basis of calculation: 1080 is half of 2160. 2048 is half of 4096.  1920 times 1.0667 equals 2048.06)

Probably not much help as 1% is probably the most accurate that you can set but it would result in nearly as large a distortion in the horizontal sizing.

Haha, looks like we both had our calculators out.

I actually prefer the 4K aspect ratio - bit more 'film-like' - so went with the Y-axis option.

Luckily I had a graphic already sized to 4096x2160, which when imported via Pan & Zoom maintained its aspect ratio.

So it was simply a question of trying to visually match the aspect ratio to the existing graphic via Resize, ie maintaining consistency in the little black lines top and bottom.

And the answer is - drum roll - reduce to 94% on the Y axis. 

So to summarize, if you want to export native 4K to an HD platform like Vimeo, and you don't mind a little mask top and bottom, you resize the Y axis to 94.

Yay. Finally contributed something semi-useful.

J 

If you'd been in a UHD 3840 project you could have used frmaeflex on the 4K source footage and set the scaling/letterbox you wanted. Then exported at HD with a sharper image.

Thanks Pat,

Will have to look into that.

Presumably I could open a new, UHD project, drag the footage over then attempt what you've described?

Just doing the math 4096 / 1920 = 2.13333 * 1080 = 2304