6:1 vs. 4:1 for horror film

[egon touste]

4:1 for night shots and other hard to compress scenes and also for chroma/greenscreen shots Thats at least what I would recommend. Then use 6:1 for normal straight shots. i.e daylight and not to much radical movements of the camera or within the scene. the 4:! instead of 6:1 will help out to get a nicer falloff towards black in lowlight as it gives a less chuncky noise floor.

I would never advise high data rates in low light, its not useful, your just capturing noise floor usually, and it isn't pretty. in general (with the exception of forests and open moorland IME..), ive noticed people shoot at pointlessly high data rates. crime and punishment (American TV show..I aint seen it) is shot at 4k at 10:1.. but 5k compresses better than 4k (proportionally, pixels per kilobyte etc), so 12:1 @ 5k will be similar to 10:1, at 4k.. how much do you want to spend on data storage to store all this noise floor that you've captured? also, most useful noise reduction uses temporal analysis.. higher data rates don't help NR. do yourself a favour, just shoot 12:1 or 10:1 .. I have written wavelet and inverse wavelet transformations and compression systems that filter the resulting coefficients..turning the data rate up can sometimes actually hurt image quality.. something always gets thrown away (that's what lossy compression does), but more data rate can sometimes make the compression system make worse decisions regarding what should/can be thrown out, and what should be kept.. but a culture of covering your ass prevails in film world.. the stakes are just too high, and everyone is an expert.. so if your scared, shoot at stupid data rates (like the ones mentioned at the top of the thread) IMO etc