I've just skimmed over this but it occurred to me that you could simply set the framerate of the SWF to that of the frame-grabber, in which case the millisecond values should correspond exactly to frames in the SWF. That approach would remove any rounding issues you may have at the moment...
Jon Molesa wrote: > I only skimmed this, but it may be useful to you. More so than my > explaination > > http://www.science.uva.nl/ict/ossdocs/java/tutorial/ui/drawing/animLoop.html > > It talks about an animation loop. Appears to be java or js, but that's > close enough to AS to gleen something useful maybe. > > * Seth Markowitz <[EMAIL PROTECTED]> wrote: > > >> On 3/5/07, Jon Molesa <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]> 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@osflash.org >>>> http://osflash.org/mailman/listinfo/swfmill_osflash.org >>>> >>> -- >>> Jon Molesa >>> [EMAIL PROTECTED] >>> >>> _______________________________________________ >>> swfmill mailing list >>> swfmill@osflash.org >>> http://osflash.org/mailman/listinfo/swfmill_osflash.org >>> >>> > > >> _______________________________________________ >> swfmill mailing list >> swfmill@osflash.org >> http://osflash.org/mailman/listinfo/swfmill_osflash.org >> > > > -- ----------------------------------------------------------------------- Nils Millahn Internet Solutions - Design and Development - Flash Specialist T: +44 (0) 7909 528 617 E: [EMAIL PROTECTED] W: www.hub124.co.uk ======================================================================= Notice of Confidentiality. 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