Rotating video... 2004-03-19 - By ryanm
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> Does anyone have experience displaying .mov(s) or .flv(s) at an angle?
> I'm trying to run an imported .flv rotated a positive 9.1 degrees -
> the resolution looks (acceptable) if I keep the original file size of
> 40 mb, scale it down and then rotate, however that large of a file size
> is not desirable. The Flash import has the .flv scaled down to just
> over 50% (381 x 254), with quality @ 100%, keyframe interval of 1, and
> 1:1 encoding ratio. It looks great until rotation, however video gets
> chunky / choppy if any rotation is performed. Using a Gaussian blur
> seems to fix the static images I have rotating, however my attempts to
> perform the same on video go unrewarded....
>
Always start from the source whenever possible. If you want to scale the
movie down, scale it down before you import it into Flash. It will reduce
the import size, which will reduce the export size. And an app like Premiere
or AfterEffects will do a much better job of resampling it down than Flash
will. Also, set your keyframes to the same as your framerate. That will
check synch every second, which should be plenty. Also, make sure that the
source file has the same framerate as your Flash movie. If it's different,
change it in the movie *before* you import. What you want to do is reduce
the number of ways that Flash touches your movie to as few as possible. The
goal is to make it so that Flash only does the compression, no resampling,
no rescaling the framerate, etc. Each of those processes introduces errors,
so you want to avoid as many of them as possible. You want your movie
exactly as it will appear in Flash before you import, so that it is changed
as little as possible. I might even do the rotation in something like
AfterEffects, and mask the blank space at the edges.
ryanm
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