How to crop an entire 4K (3840 x 2160) footage to 1920 x 1080 (HD)?

JocelynL

Newbie Joined: Jan 10, 2018 18:36 Messages: 17 Offline

Solved by

May 27, 2018 19:07

Hi,

Is it possible with PD16 ?

Regards

PowerDirector Tutorials

Senior Member Location: Tennessee Joined: Sep 29, 2014 20:25 Messages: 192 Offline

May 27, 2018 21:09

Quote Hi,

Is it possible with PD16 ?

Regards

I have recorded at 1080P and when I compile I select 4K and upload to youtube and youtube displays it at 4k when its not. So I am thinking the same thing would apply when you compule just select 1080p

JocelynL

Newbie Joined: Jan 10, 2018 18:36 Messages: 17 Offline

May 27, 2018 21:54

It's a good idea ! I will test it.

I am doing something like that ... by cropping the 3840 x 2160 footage to 1920 x 1080 during post process.
Ref.: http://www.youtube.com/watch?v=rmH618dLTVc

Hatti

Contributor Location: Bonn, Germany Joined: Feb 21, 2017 15:54 Messages: 576 Offline

May 28, 2018 06:01

I have to say: No, I tried and it's results are not acceptable.

Hatti

Camera: Sony FDR-AX33,
Parameter: MP4 H.264, 20000 kB/s

4K original clip (YT converted into FHD?):

Full HD cropped with PD16

Full HD cropped with competitor

Win 10 64, i7-4790k, 32GB Ram, 256 GB SSD, SATA 2TB, SATA 4TB, NVidia GTX1080 8GB, LG 34" 4K Wide, AOC 24" 1080

Eugen157

Senior Contributor Location: Palm Springs area, So.CA Joined: Dec 10, 2012 13:57 Messages: 662 Offline

May 29, 2018 22:25

Joycelyn,

I obviously must be missing something. Why not just re-encode from UHD to HD instead of cropping.?

And if the video is created in HD then maintaining that format will always be your best quality. Re-encoding to 4K will degrade the PQ because the resolution is still only HD but encoding noise and artifacts have now been added.

What do I not see?

Eugene

This message was edited 2 times. Last update was at May 29. 2018 22:35

73s, WA6JZN ex DL9GC
CYBERLINK PLEASE ADD UHD BLU RAY BURNING SOFTWARE
PD14,
Win10,64bit.CPU i7 6700,16GB ,C= 480 GB SSD ,GPU GTX1060 6GB 1 fan. Plus 3 int, 4 ext HDD's for video etc.LG WH16NS40 reads UHD.
4K 24" ViewSonic monitor.Camera Sony FDR-A

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

May 30, 2018 18:35

Hi Jocelyn -

In the video you linked, the initial 24-600mm zoom was done in-camera & the 600-1200mm zoom was done in post. I have the predecessor to that camera which has the same long zoom, but haven't replicated the same steps here.

Yes you can crop an entire UHD video to FullHD. As Eugene posted, you can also just render to 1080p without cropping. Alternatively, you can apply zoom from the full UHD screen to 25% which gives you 1920x1080.

This is UHD (3840x2160) produced to FullHD (1920x1080): https://www.youtube.com/watch?v=TcoiIVZC_fE

This is UHD (3840x2160) cropped & produced to FullHD (1920x1080): https://www.youtube.com/watch?v=PBt5qP63C40

This is UHD (3840x2160) zoomed & produced to FullHD (1920x1080): https://www.youtube.com/watch?v=gN__vCGebkM

Unlike Hatti, I have no tested with any other NLE.

Cheers - Tony
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