[swfmill] newbie: creating animation from a series of jpg files various timings

[Seth Markowitz]

On 3/5/07, Jon Molesa <rjmolesa at consoltec.net> wrote:
>
> Nice solution to a problem.  Mind if I include this in the wip
> documentation as an example?



what is the "wip" documentation? -- sure.. you can use the example in the
doc.


In either case, your issue isn't so much with swfmill as it is a
> mathematical conversion from ms to fps.  Is that a correct assessment?



You're absolutely right.  The real question here is what is a good formula
for converting milliseconds to frames.  Right now I'm doing this in my perl
script:

$fps = 15;
$frameNum = int($millisecondTimeStamp/1000 * $fps);



My first thought is to decide on a fps rate that you'd like to have.
> Then there _could_ be total of 1000 fps with the framegrabber. A fps of
> 12 fps is a good speed for the human eye I believe?? Double check on that.
> You'd have to figure out which block the captured frame fell into and
> place it
> in that frame.  On a 12 second frame rate, 1 frame would contain
> 83.33ms.  So you'd just have to figure out what which block the captured
> frame fell into.  swfmill frame second1-frame1~=84ms,
> second1-frame2~=168ms... and so on.
> It's too early to come up with a formula, but maybe later, or maybe
> someone else can develop that.  Anyway, I hope it helps and is close to
> correct.  But that's the way I see it.
>
> * Seth Markowitz <seth.markowitz at gmail.com> wrote:
>
> > Hi,
> >
> > I'm a newbie to swfmill, but I did get it working for my purposes... I'm
> > just trying to figure out how to make it more efficient.  Here is my
> > situation:
> >
> > Here's my inventory:
> > 1. I have 1000 jpg images taken from a vga frame grabber - NOT in frames
> per
> > second... the timing is variable.  For example, file1.jpg was grabbed at
> > 30ms, file2.jpg was grabbed at 400ms, file3.jpg at 410ms, an so on. The
> time
> > starts from Time == 0ms when the frame grabber was turned on.
> >
> > 2. I have an XML file called capture.xml  that contains the timestamp in
> > milliseconds for when each jpg was captured:
> >
> >    <Capture>
> >      <FileName>Slide_0020.jpg</FileName>
> >      <SlideNumber>20</SlideNumber>
> >      <CaptureTime>64174</CaptureTime>
> >    </Capture>
> >    <Capture>
> >      <FileName>Slide_0021.jpg</FileName>
> >      <SlideNumber>21</SlideNumber>
> >      <CaptureTime>64869</CaptureTime>
> >    </Capture>
> >
> > So....
> > By putting all the jpg files together into a SWF via swfmill, I should
> have
> > a fairly descent "flipbook" type animation.  I've created a perl script
> to
> > parse the capture.xml file and creates a swfml file that looks like
> this:
> >
> > <?xml version="1.0" encoding="iso-8859-1" ?>
> > <movie width="640" height="480" framerate="15">
> >  <background color="#ffffff"/>
> > <frame>
> >    <!-- frame:0  ptime:54 -->
> >    <library>
> >        <clip id="image1" import="Slide_0001_Full_resize.jpg" />
> >    </library>
> >    <place id="image1" name="myImage1" x="0" y="0" depth="1" />
> > </frame>
> > <frame/><frame/><frame/><frame/><frame/><frame/><frame>
> >    <!-- frame:6  ptime:408 -->
> >    <library>
> >        <clip id="image2" import="Slide_0002_Full_resize.jpg" />
> >    </library>
> >    <place id="image2" name="myImage2" x="0" y="0" depth="2" />
> > </frame>
> > <frame/><frame/><frame/><frame/><frame/><frame>
> >    <!-- frame:11  ptime:752 -->
> >    <library>
> >        <clip id="image3" import="Slide_0003_Full_resize.jpg" />
> >    </library>
> >    <place id="image3" name="myImage3" x="0" y="0" depth="3" />
> > </frame>
> >
> > .....
> >
> > Right now this is klunky because I'm trying to convert the millisecond
> > timestamp into frames per second.  For example, if I want to run this
> > animation at 10fps, I know that the jpg captured at 100ms will appear in
> > frame 1 and so on (is that right??).  So what happens in between each
> > frame... if  file1.jpg is captures at 10seconds before file2.jpg, I just
> > stick (10x10) 100 <frame /> tags as filler in between the two
> images.  There
> > must be a better way than this.  Also, since I'm converting from
> > milliseconds to frames per second... I think I'm losing a lot of
> precision.
> >
> > How could I create this "flipbook" effect, given the inventory above
> using
> > swfmill simple?
> >
> > I think this is a pretty interesting problem and I really wanted to
> thank
> > the creators of swfmill... it's a great solution to this type of
> thing.  I
> > was orginally trying to create an AVI file from this series of jpg
> files,
> > but it got way too complicated for me.
> >
> > Looking forward to some suggestions!!
> >
> > Seth
>
> > _______________________________________________
> > swfmill mailing list
> > swfmill at osflash.org
> > http://osflash.org/mailman/listinfo/swfmill_osflash.org
>
>
> --
> Jon Molesa
> rjmolesa at consoltec.net
>
> _______________________________________________
> swfmill mailing list
> swfmill at osflash.org
> http://osflash.org/mailman/listinfo/swfmill_osflash.org
>
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