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does anybody know how its done and how it actually works? i managed to get a track of a shot that the auto track just couldn’t handle – super jerky and handheld. but i was totally guessing at it as i went. any help would be great! cheers.
the one thing that tip does not mention (and it’s an excellent guide) is that the trackers are a lot easier to manage of you change the toggle to “Solo” instead of “Gang” or “Selected”
That makes it so all trackers other than the one you are on are effectively deactivated and hidden, but you don’t have to go through all the hassle of turning them on and off. Add a new tracker and the previous one disappears. Makes the tracking of 20+ points much easier.
hi,
depending on what you would like to know .. ?
you need a lot of tracking points (obviously ;-)) – min 8 trackers on 2 “keyframes” in the shot – min 6 trackers continuously in all frames – not necessarily the same 6
the tracked points should be distributed in space to define enough depth & perspective overlaps. – selecting all points in or close to a common plane will not work, even if the shot does look “nice” & 3D
still it is quite helpful, if some trackers are in sort of a “rectangular” relation to each other, as this helps in defining the orientation of the xyz axes & the later positioning of the objects.hth –
robertAnother thing not mentioned in the explanation is the crucial “Pixel ratio” button. It defines how non-square your pixels are. It’s “number of true square width pixels of this image” divided by “current width pixels”, for anamorphic PAL as an example (not entirely correct but correct for Flame because it considers 720×576 as square pix, hehe):
1024 / 720 ~ 1.422
Another example where you totally need this is Viper FilmStream in widescreen mode (2.37):
2056 / 1920 ~ 1.333
Besides, the “relations” never really worked for me. If you want precise positioning of features / fitting with regards to real geometry some real image modeling solution will do better (like recent PFTrack).
of yes and you _can_ track backwards if you do it from a non-snapped frame (frame where there are no track/ref keyframes)
that tip was added to the site 5 years ago.
somehow I am sure there were no changes to the tracker since then, even though I started doing flame 3 years ago (robc can confirm). It’s just sort of _there_ 🙂 this tutorial does not mention any controls on the first page of the 3dt menu. I wonder how much effect lens distortion tweaker has.
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