From: Nicholas Hart <[EMAIL PROTECTED]>
Subject: Re: SMIL and JavaScript???
Yes, this is possible, but it requires a little bit of html/javascript (and
possibly java) authoring on your part.
There are several steps.
1. You need to put URL events in your presentation. See the RealProducer's
documentation on rmevents for information on how to do this with a
RealMedia file.
2. Make the URL events in your presentation be any arbitrary string or
javascript function call you want. (ie. instead of "http://mysite.com" use
"myfunc()" or "slide1")
3. In the embed/object tag for your embedded RealPlayer make sure you use
the parameter AutoGotoURL and specify FALSE. This will prevent the
embedded ActiveX control or Netscape plugin from sending URL events to the
browser and will instead send them to a javascript/VBScript callback.
4. Add support for the OnAutoGotoURL callback in your HTML. This is easy
on IE, more difficult on Netscape and will require some Java. See the
embedded RealPlayer extended functionality guide for more info on how to
accomplish this. http://service.real.com/help/library/guides/extend/embed.htm
5. In your OnAutoGotoURL callback handler, do whatever you like with the
URL string passed in. This is where you will receive your "myfunc()" or
"slide1" strings (using the earlier example.) Using javascript you can
then do any arbitrary action you like and use the string passed in as a cue.
A caveat: I haven't personally done this exact thing to make a presentation
cause the browser to execute some javascript, but I am certain it is
possible. I do know that by providing your own support for the AutoGotoURL
feature in javascript you should be able to handle URL events pretty much
any way you like.
At 05:30 PM 8/5/99 -0400, you wrote:
>
>Thanks for the great insight. Let me ask about the SMIL time line. Is is
>possible
>to trigger javascript functions at certain points during a presentation?
>This is exactly
>where I am stuck. All I am trying to do is set a powerpoint image in a
window
>and have the real video clip change the pix as the file is played.
>
>I am also trying to add a form drop down to select different starting
>points in the
>real video file. What is the best javascript function for this? (I am
>reading all the docs
>but on a real tight deadline. I appreciate all your help everyone!)...
