Hello.
I'm considering using multiple tracks a movie, to reduce total space. One
track will contain the result of a screenshot (from a vdig). When the user
stops moving the mouse (the capture rectangle, which is smaller than the
screen, is centered on the mouse) - the vdig stops giving frames. The
mouse is free to move a little before the vdig thinks it's enough to begin
capturing more frames. In other words, even though the vdig is no longer
returning frames, the user can be quite active (using the mouse within
roughly 80% of the capture rect).
I'm using this approach to conserve space from the target movie. The
compressors are good - but if I don't send frames when I don't need to, I
save even more space.
Of course - the player of this movie cannot see the users mouse. I'd
normally overlay a mouse image onto the bitmap output by the vdig, but
because the vdig's not going to be outputting frames (even though the user
is still free to move their mouse) - this approach won't work.
So I'd like to use another track to record mouse movements.
Ideally, i'd like to have the track be about 16x16 pixels (or whatever the
mouse size is), and be able to specify that it a) overlays the other track
[this I'm pretty sure I can do, after having read the QT tutorial], and b)
specify it's position - that is, move it about - not have it fixed at 0,0.
Is this possible?
If not - is using a clip region effective? (e.g: a full size secondary
track, just for a mouse cursor - where almost the entire track is
blank/empty/white (whatever is appropriate), with a clip region around the
mouse area? If I do this - will QT be smart about what is encodes? will
is record only the small area defined by the clip region? or will it still
encode an entire frame?
Regards,
Neil
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