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Rendering Odd and Even Frames..
Hey all, have another question regaurding my 3d Stereoscopic project I may have comming up. One of the way’s they may use this is by using the Active Glass 3D glasses. If they go this route I will need to output 1 file instead of 2, with frames that are interlaced. I know there should be a way to set this in AFX but not quite sure on what it is.
I have 2 animation comps both 30 seconds long.
I need to bring them both into 1 comp, and when i output them I need the even frames (0,2,4,6,etc) to just show animation comp1 and the odd frames (1,3,5,7, etc ) to just show from animation comp 2.Do i need to set up a script of some sort? Thanks.
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12 Replies
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I believe the 3D Glasses effect allows you to take 2 halves of a stereoscopic source and combine them in a variety of ways, one of which is through interlacing.
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Yes im sure, the 3D glassees effect is not an option for me at this time. We are not using Red and Green lenses…but passive lenses that are either polarized ( which requires 2 outputs to be projected at the same time )
Or using active 3d glasses that are synced to the projector. The projecter then controls what frames are being shown on the screen. So the left eye needs to see even FRAMES and the right needs to see odd FRAMES.
kinda confusing I know…and all this for a job that still may not happen.
So if anyone knows a quick way to set up the render setting let me know. Thanks!
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well if you just want every other frame to be from one comp and the other frames to be from another comp and render them as one file, this should work…
drag both comps into a new comp. add the strobe light effect to the top comp. set ‘strobe’ to ‘make layer transparent’. set the duration to 1/29.97 (or what ever frame rate you are using). set the period to 2/29.97 (or the frame rate used in the previous step).
that should do it….
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Apologies, when you said:
[Justin Zion] “If they go this route I will need to output 1 file instead of 2, with frames that are interlaced.”
It sounded to me like you needed the left and right sources split onto different fields of the same frame, so that the left eye would see the upper field, and the right eye would see the lower… My mistake.
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Create a solid,
apply Grid and set Width=your comp width, Height=2, Border=1
Apply AlphaLevels and set Input White Levels to 0
Now you have Black and White alternating lines.Precompose this layer and use it as Matte for your 2 comps.
Set TrackMatte to Alpha for your upper-field-comp,
Set TrackMatte to Alpha.Inverse for your lower-field-compworks like a charm 😉
cya,
Jan
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Correct me if I’m wrong, but doesn’t this accomplish the same thing as the 3D Glasses effect (with the proper settings)?
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Just been reading this post again, cause it’s quite confusing.
and yes !!! 3D Glasses does exactly the same,
thanks for the tip ! I didn’t even know that plugin existed.cya,
Jan
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Someone might have already solved this for you, but I think I remember seeing something that would help in one of Maltaannon’s video tutorials. If you haven’t already found a way to do it, you might want to watch the tut – https://maltaannon.com/after-effects/slow-motion/
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3D Glasses Effect only works with the old school Red and Green 3D glasses. The way this will be shown is through Active Glass which is much more complicated then just using the 3D Glasses Effect unfortunately.
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i’m not an expert at all on this topic (never done 3d stereo vision), and i think you know a lot more about what you need than i do, but looking at the 3d glasses effect there are options (like interlace upper L lower R) that are designed to work with polarized glasses or lcd shutter glasses, not the red/blue guys from the 50s. and that sounds somewhat like what you are describing, and i think that’s where we are getting a little confused.
if you need a single file with one image displayed on the upper field and another image displayed on the lower field of interlace media, the interlace upper L lower R option would seem to provide that.
alternating the frames of the two comps in a 59.94 comp (using something like the strobe effect or looping opacity hold keyframes), then interlacing the final output to 29.97i should produce the same effect.. one image on the upper field the other on the lower field.
is this kind of output what you think is needed…?
Kevin Camp
Designer – KCPQ, KMYQ & KRCW
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