anyone doing HDR video?

terra1

terra1

Well-known member
whilst doing a bit of colour correction in after effects... i started duplicating layers to apply different effects on each, then set the layers blending modes/opacity to see what results i could get.

im not sure if this is classed as HDR but i remember a thread someone started about HDR a few months ago but cant seem to find it.

it seemed an interesting thing but i've found little on the net about HDR single camera video, or even if its worth it?

anyone have any thought/experiences in that area?

many thanks if anyone posts :smile:
 
To do HDR video (or stills) properly, you need multiple exposures. The whole point of HDR is to capture more detail in areas of highlights or shadows than can be captured in a single exposure due to the limitations of a cameras chip. So if the information is not captured in the highlighs and shadows to start with (ie: by using multiple exposures) then you won't be able to add it in later by any means.

You might be able to use colour correction/grading/composites to create a look similar to that of HDR images with their almost surreal look, but you're never going to be able to take a single image and extend it's dynamic range beyond what has already been captured.

To do HDR video properly you need to use multiple cameras - I've seen some test shots done with a 5dmkII's with some kind of prism to split the image into two different cameras, each with different exposure settings, but I'm not sure how it actually works - ie whether it's a single lens feeding into the prism or a prism feeding into two lenses etc.
 
stonebat seems pretty limited within photoshop with the video files, i'm sure it would be useful but i think il stick in prem/af. (saying that its still a great addition to photoshop worth checking out, and i know il be missing so many uses for it but for now i cant think)

deltoldjohn yeah it was playing about with the "file/automate/merge HDR files" in adobe photoshop that interested me in HDR, i don't really shoot many stills but liked the idea of varying exposures layered up to create a HIGHER DYNAMIC RANGE. (i didn't realise HDR was an automated process these days)

i saw the 5DmkII HDR video example you mentioned, it looks like HDR! a bit extreme for what i was hoping to attempt on video but it is very interesting.

i've been playing with composites and graded layers so far, seems positive for static shots i've yet to experiment properly.
 
I've done some subtle HDR type stuff within the same image just by isolating different parts of the image (mainly via rotobrush rotoscoping in AE CS5) and color correcting separately.

http://vimeo.com/15765781

See the shot of the reservoir @ 0:22. The buildings, sky, and water are three different layers with exposure and other settings changed independently in post so I could bring out the clouds and such without totally darkening the buildings.
 
99% Of all the HDR Photos SUCK!! But every once in a while you come accross someone that knows what their doing and you find an image that blows your mind.
 
ahhhh Ben_B it was your post i saw a few months back, i couldn't find it when searching pre-post.
yeah rotobrushing/masking the same layer with different gradings was how i was toying about within after effects. il be happy if i can add to the sky/clouds detail while the city street/buildings are exposed correctly, thanks for posting :smile:

maranfilms yeah it is a very distinct look (subtlety needed i feel, less is more) :smile:
 
I do cg and I think thats the only real way to do hdri video.I can render out 32 bit radiance files and make a true hdri animation not that you give a crap lol
 
haha pixalight all information, advice, knowledge is welcome on my posts... even the stuff i don't give a crap for! lol its always good to read what others are doing.

yeah i've been playing with colorista in after effects and been managing to combine a few duplicated shots at different colour correction levels to extend the range of the shots, not really "hdr" but kind "more dynamic range" seems to be working for me :smile:

.... oh yeah...... not that you give a crap! hahaa peace man :smile:
 
nosys70

DXO pseudo HDR for video?! (from one shot)

i checked the website but could only see information regarding still photography.
 
The other thing I've been playing around with recently to interesting effect is to contrast and pivot the hell out of an image till you've brought the sky and other bright areas down into the mid range, and the darks almost completely black. Then luma key the darks to isolate them, and color correct separately. Will post a test shot at some point, been pretty busy.
 
Ben_B that does sound like it could lead to some interesting stuff, id been trying with the rotoscope brush or precise masks but the keying method sounds good, i can think of a few areas where it might fall down but i'm sure with a simple mask its a goodie, thanks for suggesting :smile:

as scotland is having the worse snowfall for 40 years (20 inches) i cant get out shooting (need some tailor made clips to try the keying on)

all the guys who get "real heavy snow" will be laughing at my 20 inches :smile:
 
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