Creative COW SIGN IN :: SPONSORS :: ADVERTISING :: ABOUT US :: CONTACT US :: FAQ
Creative COW's LinkedIn GroupCreative COW's Facebook PageCreative COW on TwitterCreative COW's Google+ PageCreative COW on YouTube
FORUMS:listlist (w/ descriptions)archivetagssearchhall of famerecent posts

Twixtor in FCP (masking & tracking?)

COW Forums : RE:Vision Effects

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Share on Facebook
Mike RobertsTwixtor in FCP (masking & tracking?)
by on Jan 18, 2011 at 12:38:43 am

Hi there,

I have been experimenting with twixtor to create super slow mo for some action/sports clips, so far my best results are to with 60p conf -> 24p footage shoot at a high shutter speed against a fairly plain background (eg: person jumping - background blue sky only)

However I still get the occasional unwanted blurring/distortion that I just can't seem to get rid of, I've seen some amazing examples of twixtor that don't have these problems.

this leads me to think these clips use twixtors masking and tracking functions to help it keep things looking good.

I have no idea where to start with these functions, I've looked online for tutorials etc with no luck.

I'm using twixtor pro in FCP, hope someone can give me some tips or point me in the right direction.
Mike.


Return to posts index
Reply   Like  

Pierre JasminRe: Twixtor in FCP (masking & tracking?)
by on Jan 18, 2011 at 8:17:06 pm

There is a bit of info in the manual.
PRO supports matte layers but you have to externally create these in FCP as there is no roto tool in the app.

But first, I presume you do the Cinema Tools trick explained here:
http://library.creativecow.net/articles/freitag_lori/twixtor-fcp-frc.php
So Twixtor actually has 60 frames to work from to make the 24P

Pierre
RE:Vision Effects



Return to posts index
Reply   Like  

Mike RobertsRe: Twixtor in FCP (masking & tracking?)
by on Jan 26, 2011 at 1:07:03 pm

yes im shooting a 60fps and conformingto 24/25 with cinema tools, also shooting with higher shutter speeds to make the images sharper which seems to help twixtor.

I am getting some pretty good results but still have unwanted artifacts appearing.

I can't think of any other way to reduce this!

I have read the manual but it's not making much sence. I know how to make a very basic matte/mask in fcp. But how do i make a mask that follows my subject in the foreground that i want to be clear and in twixtor slow mo? and how do I tell twixtor to use that mask!?


Return to posts index
Reply   Like  


Pierre JasminRe: Twixtor in FCP (masking & tracking?)
by on Jan 27, 2011 at 2:06:05 am

There is no way for us to support mask shapes (geometry) in FCP. You can however somewhere else create some mattes and import them in your project and use that in Twixtor. Before we go there, you can also send a short clip to us to see what is going on. There is a Contact Support form in the Support tab on our website that will send a response with ftp site info is the movie is too large.

Pierre



Return to posts index
Reply   Like  

Mike RobertsRe: Twixtor in FCP (masking & tracking?)
by on Feb 5, 2011 at 2:49:15 am

here is a link to one of my tests,
http://www.appendixj.org.au/twixtortest-720HD.mov

the main problem can be seen in the camera right hand, and slightly in the other hand.

So do I need to make a tracked mask/matte in something like after effects and import the peices of footage wih transpartent backgrounds into fcp? I still don't understand how how to to tell twixtor to use these masks, and what actualy needs to be masked in the first place.


Return to posts index
Reply   Like  

Pierre JasminRe: Twixtor in FCP (masking & tracking?)
by on Feb 5, 2011 at 5:12:13 am

The short answer is yes. I will try to do an example this week-end using the two source frames that give the worse results on top right side hand to show you. I would usually cut a matte for the arm at the edge of the shirt and that will be what is called Foreground 1 in Twixtor.

Pierre



Return to posts index
Reply   Like  


Pierre JasminRe: Twixtor in FCP (masking & tracking?)
by on Feb 6, 2011 at 8:22:07 pm

After I wrote that I remembered there is a couple of examples here:
http://help.revisionfx.com/tutorial/49/

Here's a quick example using your footage:

1) Output with no layer
http://www.revisioneffects.com/bugreports/results/outputNoLayer.jpg

You obviously end up with some misregistered fingers

2) Output with layer
http://www.revisioneffects.com/bugreports/results/output.jpg

I did a quick matte (looks like below) - could be tighter (right now in Twixtor I set Inv Matte Shrink to 4 as this is a sunday afternoon roto job :) -- you need to do that on the original footage without twixtor - but look first where Twixtor breaks and this will tell you what source time frames you need a matte where.

3) Matted Foreground looks like this, we use the Alpha channel here
http://www.revisioneffects.com/bugreports/results/mattedLayer.jpg
To use such matte in FCP to separate foreground from backgound, you first need to make an animated matte (black and white footage... Where white are pixels of the foreground element), and then drop it into the FG Mask clipwell of Twixtor.

4) Also note: The footage seems to be shot with some nasty auto-sharpness or something - look at the dark blue fringe - and the ghosting around everything - that absolutely does not help
http://www.revisioneffects.com/bugreports/results/Untitled.jpg



Return to posts index
Reply   Like  

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Share on Facebook


FORUMSTUTORIALSFEATURESVIDEOSPODCASTSEVENTSSERVICESNEWSLETTERNEWSBLOGS

Creative COW LinkedIn Group Creative COW Facebook Page Creative COW on Twitter
© 2014 CreativeCOW.net All rights are reserved. - Privacy Policy

[Top]