2.7K to 1080p

[ukglyn]

Hi all

Ive searched around for a definite answer but cant seem to find one.

Am I right in thinking that if I film in 2.7k with my p3a, it is the same aspect ratio as 1080p, therefore I can render it at 1080p but it will be of a higher quality than if I shot in 1080p from the start?

Many thanks if you can help me get my head around this.

Merry Christmas to you all.

 

[mandalay]

Both 2.7k (2704 x 1520) and 1080p (1920 x 1080) have the same aspect ratio of 16:9. So you are right; you can render it at 1080p. But I can't tell the difference between the two since I have only 1080p TV. So I just shoot everything in 1080p.

Merry Xmas to you as well.

 

[SouthernPhantom]

2.7K is valuable if you use an editing program like Adobe Premiere and intend to crop (or zoom) parts of the video before rendering it to 1080 or 720 (possibly for YouTube or Vimeo), or merely to reduce the file size for archival purposes.

It's also good for still-photo screen captures from your videos.

Similarly, a lot of folks shoot their still pictures in 12MB RAW mode, even though the finished product may well be a 900 x 600 JPEG.

 

[vgt]

Shooting in 4K and 2.7K is always better than shooting in 1080P, even when your final output is 1080. Google Sub-Chroma sampling.

 

[mandalay]

True but can you really tell the difference with your naked eyes?

 

[SouthernPhantom]

True but can you really tell the difference with your naked eyes?

No. You are correct.

If you don't plan to do any editing that will involve smaller portions of the image, then it's much more efficient to shoot, edit, and view in 1080. The file sizes are more compact, and there's less stress to the processors -- in both the Phantom and on your computer.

 

[mandalay]

Thanks for the confirmation. I don't do any editing so 1080p is sufficient for me.

 

[ukglyn]

Thanks all for the input, I will have a go to see if it is worth doing, like you say to the naked eye it probably looks exactly the same.

 

[Gordon Melrose]

I have mistakenly made some videos in 2.7K but they won't run on Windows Movie Maker. Does anyone know how to convert them to 1080p ?

 

[olo]

I did a resolution comparison with 2.5k (4 mp) 1080 (2 mp) and 720 (1 mp)
The detail is superior in 2.5k
I use handbrake.fr to re-encode the clips I keep. It is free and works on all platforms. It saves 75% space with near original quality (depends on your settings).
If you use 2.5k and you crop to 720 you have a nice zoomed in video.
Since all my equipment maxes out at 1080 I re-size in handbrake to 1080.
This way there is more detail as if I was shooting in 1080 and doing a re-encoding.
for a good quality / size relation choose preset: high profile
in picture change to width to 1920 or 1280 for re-sizing or set cropping to custom for the zoom in video
If you crop (zoom in) from 2.5k to 1080 - use 392 and 220 as crop settings.
If you crop (zoom in) from 2.5k to 720 - use 712 and 400 as crop settings.
in video set quality to 25