Checking the weather forecast it seems the funniest think to do, so I
plan to work on it this (long) weekend :-)
If you have any ideas and extra documentation, please throw them in.
For the playback module I was thinking to start with a widget providing
some simple controls, like start/stop recording, playback, render to
movie file, etc. When this is attached to a display it listen for
changes in the projection control of that display and record them
together with timing information. From this info I can replay everything
and capture the display content - display possibly loaded with a more
complex scene (more data references, or data containing more samples
etc.). It sounds simple and I did it once - worked fine, provided that
the user is willing to wait long enough for rendering and saving every
single frame.
That is the starting point. Any thoughts?
Cheers,
-iulian
P.S.
idea: I'm not sure I'm not just dreaming, but it may be possible to
"save" the display to a RTP stream (using JMF) so we can have a
broadcast server - people can watch a live demonstration of your
application using a common rtp player, like realplayer. Need to check on
this and do some testing :-)
Wilson, Andrew, J wrote:
In case someone is going to work on this, I mention that
there is some code here
http://java.sun.com/products/java-media/jmf/2.1.1/solutions/J
pegImagesToMovie.html
that will convert a collection of JPEG images to a movie to
.avi or quicktime using JMF. I'm guessing that starting from
this it would very quickly be possible to get the same
functionality as offered by visad.data.qt.QTForm
I also have some suggestions for a more sophisticated
playback module. In the past I have used keyframe animation
systems in order to generate movies where individual frames
could not be generated in real time. I think that if such a
system were to be implemented well for VisAD then this is
potentially "killer" functionality that would draw users and
developers like a honeypot.
Regret I have neither the competence nor time to build this
myself but I can provide info on how it has been done in
other systems and I will also volunteer to so some user
testing.
Perhaps the best key frame animation system I have seen was
inside AVS: why not reverse engineer this approach?
I can probably find some documentation on this if that would
help.
Andrew
-----Original Message-----
From: Bill Hibbard [mailto:billh@xxxxxxxxxxxxx]
Sent: 10 February 2003 21:10
To: Iulian Musat
Cc: visad-list@xxxxxxxxxxxxx
Subject: Re: capture images in the animation loop
Hi Iulian,
If anyone interested I can actually spend couples of days
(
week-ends
;-) ) on :
1 - VisAD file form for JMF supported media types
2 - a simple playback module - useful for presentations
(design
suggestions are more than welcome)
As Curtis said, a VisAD file form for JMF, or for any new
format, is always very welcome. If you have one and want
to serve it, we would like to add a link from the VisAD
web page. We could also add your code to our source
distribution, as long as it works and conforms to JDK 1.2.
Cheers,
Bill
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