RAW 1080p Upscale vs. 720p Downscale

Started by grodriguez, February 06, 2016, 01:18:07 AM

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grodriguez

Hey guys, been testing out the best workflow for ML on my 70d. It's fantastic though the bus speed has my resolution set at 1504x630 at 2.39:1 to utilize the most of my lateral focal length. Though it makes for an awkward position for scaling in post.

Upscaling to 1080p seems to give more issues for my footage in regards to debayering and aliasing, though I've heard that downscaling resolution to 720p could result in some bad moire. It's a given that RAW upscaled will be miles ahead of regular H.264 footage, but which of these two should result in the smoother, sharper image? Thanks  :D

dfort

Here's somebody with a comparable camera, the 700D and he used an interesting post process which involves upscaling to work with it.

http://magiclantern.fm/forum/index.php?topic=16577.0

Lakwaun

I to was wondering about this. My SD card on my 6D can record raw video at 1280x720 with no dropped frames but when I scale it up I notice more noise, moire and artifacts get introduced when only shooting at 30fps even though I know the 720 s very bad with the moire.

dfort

Quote from: Lakwaun on February 08, 2016, 11:38:47 PM
I to was wondering about this. My SD card on my 6D can record raw video at 1280x720 with no dropped frames but when I scale it up I notice more noise, moire and artifacts get introduced when only shooting at 30fps even though I know the 720 s very bad with the moire.

You might be shooting mv720 raw video instead of mv1080. If your Canon menu is at 1920x1080 you will get much better quality raw video than if your Canon menu is at 1280x720. You can still scale down the image size in the Magic Lantern menu to 1280x720. Yeah, I know it is confusing having one setting on 1920x1080 and the other at 1280x720 but it works.

If moiré is a big problem and you don't want to get a Mosaic Engineering Optical Anti-Aliasing Filter then you might want to try zoom mode. There isn't a crop hack mode for the 6D but you should be able to hit the magnifying glass button to get into 5x zoom and record video that way.