Super High speed.

[James T Mather]

Hi all, I shot a job last week where we were up to 120 fps - I just got a curiousity call from the director saying that somehow they seem to have a duplicate shot of another one in the rushes but it is apprently running at 120X2fps - ie: it is at 240 fps (by his account it is pretty "clean" slow mo - ie: not staccato) - On inspecting the file properties it seems have the same amount of frames as the normal one - etc just playback is half speed. (he is, I get the impression, not at all unhappy about this but merely curious) - anyone else had the same result?

Thanks a million

james

[puntociego]

did you shoot 4k or 2k? or less

pablo

[M.Halsell]

Also what build please?

[Andrew Martin]

Sounds intriguing, puzzling, wonderful all rolled into one.

Andrew.

[James T Mather]

2k 120 fps Build 15 - the director says that the shots are all at 120fps but one of them seems to have come through to the edit (as a duplicate) TWICE as slow. I have not seen this myself but am similarly curious.

[Noah Kadner]

I'd imagine an importing or conversion mistake somewhere along the way. That or something wonderful that snuck out of the lab. :holloween:

Noah

[Mitch Gross]

Yeah, and my guitar amp goes to eleven.

[James T Mather]

He says they're using it to cut between the versions for a time ramp effect (I asked was it "step printed" but he seemed to think it was pretty smooth from what I can gather. (the only thing I could think was either stretch printing (exported at the wrong speed) or, somehow (impossibly) duplicated fields (!) - I thoroughly realise that this is impossible and/or meaningless but I'm at a bit of a loss to explain it. I'm popping in to see it thursday.

[Uli Plank]

Could be software that does frame interpolation (aka flow motion). Motion can do it, After Effects, Shake…

Can look quite impressive, depending on image content.

We once used it to make Red footage interlace to intercut with 1080i50 – nobody complained…

[James T Mather]

yeah - but the director tells me this is how it came in - it could be as simple as good ole' fashioned stretch printing (in a video sense) - that would be the simplest answer but I can't figure out what settings one would have had in redcine in order to achive such a result on a single shot. (unless someone tweaked the frame rate for that lone item)

[Eryc Tramonn]

Could be software that does frame interpolation (aka flow motion). Motion can do it, After Effects, Shake…

Can look quite impressive, depending on image content.

We once used it to make Red footage interlace to intercut with 1080i50 – nobody complained…

Like Dziga Vertov? :)

[Jens Jakob Thorsen]

Yeah, and my guitar amp goes to eleven.
"But why dont you just make it louder at 10?"
"No no you dont understand...mine goes to eleven, see?"

[David Battistella]

I think that is the 12FPS playback limitation of _F proxies playing back B16 footage through quicktime.

David

[Shawn Booth]

And you verified that it's 240fps, or playing back as though it were?

[James T Mather]

No = as I said, I just got a call from the director and editor who were wondering why this would be - the editor was the man who sent it out of redcine. I just got a call asking how it happened - they are actually very happy with this but curious why it would happen. No solid confirm on speeds etc but I will confirm by thursday.

[Lachlan Ward]

Yeah, and my guitar amp goes to eleven.

My amp does go to eleven:>

[Jeff Brue]

Step printing ie duplicating frames has a very different feel when shot at 120 fps...motion vectors can easily get 120 to get to 240 without any of the normal artifacting, unless you're shooting a hummingbird.

[Jason Sinclair]

Do they drink large amounts of coffee???

[Michael Brennan]

JTM,
any more news on this?

Mike Brennan

[gdv]

Also what build please?

Build Smuild.
Over two thousands cameras are out there and we are asking what build and every number has a "beta" to its side.
We should have been over it long time

[James T Mather]

Hi all - yes the quicktime proxy got somehow confused and grabbed the metadata from another shot ie: it took the "length" cue from a different file somehow and so step printed the shot out to twice it's length. When I finally saw it I noticed the step printing (ie: it was playing back in what animators call "twos" - repeating each frame twice) - The editor then confirmed that something had happened in the redcine/quicktime output which caused this - I don't, however, think that Redcine caused this, more likely someone transferring the rushes made some kind of error. sorry to have caused a brief flurry of excitement to the red crowd :w00t: and a brief flurry of concern to the phantom crowd :ohmy: . The balance has been restored. Panic over. Nothing to see here. Move on.:biggrin:

Thanks to all who posted.

[Charles Angus]

If it was really 240fps it would've been be darker, wouldn't it?

[Jason Sinclair]

too much coffee.... ;)