[Anthony Dupsta]

“levels-individual controls on the comp, then set clipping 32bpc to on”

Hey Chris,
On a side note: About clamping certain layers.
It is always nice to hear of a diff strategy in how to clamp.
I am curious if this is the same as just using a compress and expand expression? Both are only clamping a specified node and not compromising the entire comp.
I suppose I could do it either way? Or is there a difference I should be aware of?

[Anthony Dupsta]

So as I have to deliver today, sometimes crude gets it done. However this is not a fix but this worked:
I would find the frame that has artifacts on it.
I was do a “save frame as” re render just that frame. Sometimes the artifact would be else where and sometimes I would get a clean frame to render. So I went through and re rendered each bad frame sometimes once, and sometimes three times. I finally got a clean sequence.
However if I need to make a change and re render the entire sequence I am hosed as I can not baby sit each frame being rendered.
This is no a fix just some silly work around that got it out the door.
I had to do this because when I turned off the motion blur some frames still had the tearing, so I can isolate this to paint strokes and float. They are not playing nice.

[Anthony Dupsta]

“does it tear in AE or just when you render”
Both. I can see the artifacts in the render and when I preview everything in full.

No Tiffs. rendering in 8 bit is completely out of the question. I could try to sneak a 16bit render through the pipeline but I see where it is clamping my highs. So I will try other motion blur techniques before getting desperate with 16bit.

[Anthony Dupsta]

Real smart is pixel based right? The paint patches I have are tracking with the live action plate. When these paint patches translate AE should create motion blur. However in 32bit I get what looks like dead pixels and artifacts. When I turn off the motion blur in 32bit No artifacts.
Real smart is pixel based and I am not sure will create motion blur from my translating paint patches. I could apply the Real smart globally however that might compound the existing motion blur from the live action plate. I might try using a FG matte with Real Smart and isolate just where I want Real smart to look?
OK I will see what I come up with.
But more important, AE is tearing and breaking in 32bit when motion blur is applied to paint strokes being tracked onto a plate.

Thanks for the suggestion.

[Anthony Dupsta]

1) Unfortunately if a render has artifacts than a pre render will have artifacts. MB is tearing the render. So a pre render is not going to work if rendering in general does not work. This is a simple comp, no plug ins, just paint work. No heavy precomps, just few layers, few freeze frames tracked and than motion blured. It is producing tears or artifacts, like dead pixels.

2) No 16 bit or 8 bit effects are being used only 32 bit effects.

3)I too thought hrd compander was the ticket however since this is Motion blur tearing up and creating artifacts, no luck.

I guess I will have to take off the Motion Blur and just hand blur this thing.

If anyone who uses float on a weekly basis has run into this issue please let me know if you too have experience this.

[Anthony Dupsta]

Try 422 first. Than test your playback on the mini. See if you have the through put for real time play back with the spec that have been suggested to you.
Since I have no idea what the quality of this should be, I would just suggest burning a DVD, but sounds like you have a game plan.

[Anthony Dupsta]

I believe that the banding is from the fall off of the AE lights. 16bit would in most cases be sufficient, however I don not believe AE lights give a clean fall off even in float. Is there a way you can create the same effect using a grad or ramp in 16bit? I have abandoned AE light in the past as they generate 8 bit grads, regardless of comps bit setting.
I could be wrong but that is my experience.

First try to ad some global grain to the comp, that could help break up the banding.

I have never tried playing back a 12min pro res QT off a mac mini. But with the right codec, the right compression it will work.

[Anthony Dupsta]

OK my brain is back,

I tried levels and than I tried curves, than gave up …but wait…the magic for expressions is in “individual levels”

[Anthony Dupsta]

YES YES YES YES

This is it!

The Log conversion check box is the key! Indeed it will do the conversion instead of needing to use the cineon converter. Without it I would need to manipulate to diff comps. I hope the math is the same on the conversion. Thank you this was the ticket, just did a test and I can truly do one render and two encodes. Log and lin simultaneous renders!
Thank you both
Cheers
Anthony

[Anthony Dupsta]

Actually Walter I think you hit it on the head for me. I am embarrassed I did not think of that. I was hoping for something a little cleaner like the output module, but for now dup comps will work fine.
Again,my challenge was to render a lin and log comp at the same time.
So I would indeed need to create two dup comps one lin, one log. I don’t think Just adding an output module will work, as that would be to simple,clean and perfect.

To back track, I just want to avoid having to render a sequence in LOG, than take the step to covert it to lin later. I would prefer to set up one render that will create my hi res log image sequence, than a second baking out my proxy lin sequence. Simultaneously!

I would love if the output module would do this, but it doesn’t.

Dup comps, or proxy comps to save render time. got it! Thanks Walter