paint out nightmare = hair loss
by muiisal
on
Jun 12, 2006 at 4:50:42 pm
i'm a combustion user who is trying to get through HD string paints with great difficulty. I've done all possible to speed up my machine but it's chugging ever so slowly and crashing regularly. It's taking far far far too long.
Does anyone have any best practise workflow for dealing with HD? Am thinking of working with a Motion JPEG A to do the paint out, then replacing the footage with the HD footage and hitting render... (?!)
Re: paint out nightmare = hair loss by alknowshow on Jun 12, 2006 at 11:05:08 pm
i scond rayk on the image seq, the last thing you want is the computer to have to decode compression on top of dealing with high res
other thing i sometimes do is use the crop tool on the footage controls to crop the footage only to the area of interest (presuming you are not painting on the whole frame)
you can even animate the crop to follow the area of interest, thus minimising the res, then just press reset before you do your final render.
careful when combining this with comps though, as it cocks them up
also, you may want to set proxies for your footage, depending on what kind of paint work you are doing
finally, clone / reveal tool on high res plates is a ruthless dutchess and there's not much you can do besides make sure you only use raw footage or the current op as the reveal source (ie never use something that is being comped live), and maybe approach the paint task in sort of waves, you you can periodically render out and import, and continue painting. a pain in the ass but helps stability
Re: paint out nightmare = hair loss by Alex Udell on Jun 13, 2006 at 11:44:51 am
Hi Alex
"other thing i sometimes do is use the crop tool on the footage controls to crop the footage only to the area of interest (presuming you are not painting on the whole frame)
you can even animate the crop to follow the area of interest, thus minimising the res, then just press reset before you do your final render."
As i was just getting ready to be involved in some 2k roto work, I was curious about this....
doesn't cropping screw up your coordinate system?
Or is it ok if it's just paint ops on top of footage?
Re: paint out nightmare = hair loss by Rayk Hemmerling on Jun 13, 2006 at 12:12:40 pm
hi alex,
just a word of warning. i had bad expirience with animating the crop on the footage level. it screwed up rendering, although, i didn#t reset the crop befor rendering. but just cropping the footage (no animation) and painting over it and reset the crop just works fine. just do a little test and you'll see what works for you and what doesn't.
Re: paint out nightmare = hair loss by shin kurokawa on Jun 13, 2006 at 1:20:42 pm
I also worry about hair loss, but I've rarely had any
need to _animate_ crop in ft.op. for the simple
reason that it will change the image dimensions
and (0,0) coordinates as seen by downstream ops.
Of couse, that may or may not matter depending
on the situation.
The only exceptions were when I had to crop and
resize using the 1st version of DA Resizer eons ago
to crop and blowup stuff that was too zoomed-out
at the telecine stage, but even then it was 'animated'
in the sense that it was done at discontinuous,
scene by scene basis.
-Shin
Re: paint out nightmare = hair loss by alknowshow on Jun 13, 2006 at 4:44:10 pm
yes, im aware of the dangers of the cropping thing, maybe i didn't make them very apparent.
now that i come to think of it, the only time i have actually animated the crop is when keying, where the coordinates aren't an issue.
i found, though, that animated crops aside, cropping for just paint tasks like de-rigging etc, no comps or animation, saved alot of time when making poor old combustion try to handle 4k (which admittedly i don't do very often.) if resetting the crop screws up your work you could always render it cropped and comp back on top - depends if you think it would save any time
i admit its risky territory but if you're up against the clock i think sometimes it helps
Re: paint out nightmare = hair loss by Rayk Hemmerling on Jun 13, 2006 at 5:06:42 pm
...'cause, i can't edit my previous post-here's a new one...
for clarification:
i haven't had problems cropping and then "de-croppping", i had problems when i rendered out the comp with an animated crop. i can't remember which version it was, so i suggested a short test.
and fyi:
if you start your comp like you would do it in other node based comp app, that is, load footage, apply ops to the footage and apply a render/save node at the end, all without using a 2d/3d comp op when not necessary, caching/rendering will be faster.
Re: paint out nightmare = hair loss by Alex Udell on Jun 13, 2006 at 7:55:41 pm
Hi guys...
for large format Roto work...this seems like a real help...I just did a quick test...awesome for speed and mem useage....
I was afraid that copping the footage would reset the 0,0 based on the new sizing...
but my paint strokes down stream didn't shift... and looking closely at the crop channels in the timeline...as they are based on offsets from the original dimensions...looks like pretty smooth sailing...just have to remember to turn animate off to avoid keyframing the crop...but ewven that's no biggie to correct...
