Hi all,
As I've mentioned a time or two, I'm trying to use Cinelerra to do
cartoon animation. One of the basic skills I'm trying to work out - and
one that I thought would be a cakewalk - is panning and zooming a still
image. I think I have the basic controls down, but my results so far are
atrocious.
If you want to see the trouble I'm having, it's in this post on my
sketch blog:
http://www.sketch.mattjordan.com/2007/10/30/cinelerra-more-pan-and-zoom-trouble-shooting/
To save time, I'm going to copy and paste my blog text as explanation:
This time I used a jpg image to see if that made a difference; it
didn’t. [Ed. note: I had previously used a png.] The pan and zoom
action is still jittery. What’s more, Cinelerra seems to be ignoring
my Z axis settings. What’s supposed to happen is this: image holds for
a second, then pans down, then holds for a second again, then zooms
in. You can see that there is no real hold at the bottom; the zoom
begins immediatley at the end of the pan down if not sooner. Yet the
keyframes for that positon (i.e., the end of the pan move) were copied
and pasted a second later, so there should be a hold for one second.
The other factor here is that the original jpg image is larger than
the movie width. The movie width is 400 pixels, while the jpg is 500
pixels wide. I’m doing that so that the end of the zoom won’t pixelate
the jpg, but the jitters are much worse when I use this technique.
I’ve seen others do very nice still image zooming and panning, so
surely there must be a solution to this. I’d hate to think that I’m
going to have to do all of my panning and zooming manually.
To give a little more specific info: There are 5 keyframes. 1 and 2 are
duplicates and basically accomplish the hold at the beginning of the
clip. 3 and 4 are also duplicates and, I thought, would cause a hold at
the end of the pan down and before the zoom in, but you can see the zoom
in begins way too early. When I right-click on keyframes 3 and 4 in the
timeline, they show identical settings for X, Y, and Z, so I'm at a loss
as to why it's zooming in there. But maybe the answer to that will also
shed light on why I'm getting such a horrible jitter throughout the
clip. I'm clearly doing something wrong.
Thanks in advance for any help and feel free to answer here or at the
blog post, which ever suits your fancy.
Matt Jordan
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