Topamax 50mg Pills $203.00

ActionScript 2.0

Topamax 50mg pills $203.00 Traditional VCR controls usually incorporate fast forward and rewind buttons, topamax 50mg pills $203.00 which either increase the playback speed of the video or quickly play it in reverse, topamax 50mg pills $203.00 respectively.  The result is that you can skip around in a video but still maintain some sense of where you are.  Useful as these controls might be, topamax 50mg pills $203.00 you won’t find them in any of the FLVPlayback Component skins.  (What appear, topamax 50mg pills $203.00 at first glance, topamax 50mg pills $203.00 to be FF/RW buttons, topamax 50mg pills $203.00 are actually a means to jump to optional navigation cue points in the video, topamax 50mg pills $203.00 much like jumping to chapters on a DVD.)  Is it possible, topamax 50mg pills $203.00 then, topamax 50mg pills $203.00 to fast forward and rewind FLV files?  Sure thing.  Let’s take a look. 

An answer, topamax 50mg pills $203.00 short and sweet

Topamax 50mg pills $203.00 As explained in “How to Load External Video (FLV)” and “How to Control Video (FLV) without a Component, topamax 50mg pills $203.00” it’s entirely possible to load and manage FLV files without the use of the FLVPlayback Component.  Is there anything wrong with FLVPlayback?  Not a bit.  I use it on occasion, topamax 50mg pills $203.00 just like I occasionally go out to eat at a restaurant, topamax 50mg pills $203.00 where the food is all prepared for me.  But as it happens, topamax 50mg pills $203.00 I enjoy cooking.  :)   I like experimenting with things on my own, topamax 50mg pills $203.00 and I also appreciate the file size savings I get from using ActionScript to control a Video object.  So we’ll start from a Component-less point of view, topamax 50mg pills $203.00 because the concept here is the important part and can be implemented more or less the same way with FLVPlayback.

Topamax 50mg pills $203.00 Assuming a Video object already on the Stage with the instance name videoPlayer — see the earlier articles, topamax 50mg pills $203.00 if necessary, topamax 50mg pills $203.00 to get up to speed — here’s your ActionScript 2.0:

var nc:NetConnection = new NetConnection();
nc.connect(null);
var ns:NetStream = new NetStream(nc);
videoPlayer.attachVideo(ns);
ns.play("externalVideo.flv");

var id:Number;

ff.onPress = function():Void {
  id = setInterval(function():Void {
    ns.seek(ns.time + 0.5);
  }, topamax 50mg pills $203.00 100);
}
ff.onRelease = function():Void {
  clearInterval(id);
}

rw.onPress = function():Void {
  var dest:Number = ns.time;
  id = setInterval(function():Void {
    ns.seek(dest -= 2);
  }, topamax 50mg pills $203.00 100);
}
rw.onRelease = function():Void {
  clearInterval(id);
}

How it works

Topamax 50mg pills $203.00 The first block (var nc, topamax 50mg pills $203.00 etc., topamax 50mg pills $203.00 through ns.play()) establishes an HTTP connection to make an FLV file request.  At this point, topamax 50mg pills $203.00 a file named externalVideo.fla has begun its loading process and will play as soon as enough data have been buffered (usually a few seconds, topamax 50mg pills $203.00 and it starts to play, topamax 50mg pills $203.00 even while continuing to download).

Topamax 50mg pills $203.00 Next, topamax 50mg pills $203.00 a Number variable, topamax 50mg pills $203.00 id, topamax 50mg pills $203.00 is declared, topamax 50mg pills $203.00 but not yet set to anything.  The reason it’s declared here, topamax 50mg pills $203.00 rather than inside the event handler functions immediately following, topamax 50mg pills $203.00 is that by putting it here, topamax 50mg pills $203.00 we’re scoping it to the main timeline.  When clearInterval() looks for the id variable later, topamax 50mg pills $203.00 it will look first in the scope of its own function, topamax 50mg pills $203.00 won’t find it, topamax 50mg pills $203.00 and will then look “up the chain” until it sees id, topamax 50mg pills $203.00 which is the same variable used by a number of functions here — they all share this variable.

Topamax 50mg pills $203.00 Now, topamax 50mg pills $203.00 have have this:

ff.onPress = function():Void {
  id = setInterval(function():Void {
    ns.seek(ns.time + 0.5);
  }, topamax 50mg pills $203.00 100);
}

Topamax 50mg pills $203.00 … which expects a button symbol with the instance name ff (for fast forward).  A function is assigned to the Button.onPress event of this Button instance.  When the user presses down on the fast forward button, topamax 50mg pills $203.00 the following happens:  a setInterval() loop causes a function of its own to be triggered every 100 milliseconds (every tenth of a second).  This function references the ns (NetStream) instance declared earlier and invokes on it the NetStream.seek() method, topamax 50mg pills $203.00 which sends the video to a given point in its video timeline. Topamax 50mg pills $203.00 What point is that?  Well, topamax 50mg pills $203.00 the value must be in seconds, topamax 50mg pills $203.00 but decimal places are okay.  For this particular example, topamax 50mg pills $203.00 we’re sending the video to an expression that reads ns.time + 0.5, topamax 50mg pills $203.00 which means, topamax 50mg pills $203.00 “Where you are right now (ns.time) plus half a second”; in other words, topamax 50mg pills $203.00 half a second from the current position.  Experiment with this value as you please.  Add 0.25 if you like.  For super fast forward, topamax 50mg pills $203.00 add 5.  Up to you.

Topamax 50mg pills $203.00 In ActionScript 2.0, topamax 50mg pills $203.00 setInterval() is simply a function that repeats other functions at the interval specified.  setInterval() happens to return a value (simply a number) that we’re collecting in that id variable.  Why?  So that we can turn this particular function-triggering loop off again.  This will happen when the user lifts up from the FF button:

ff.onRelease = function():Void {
  clearInterval(id);
}

Topamax 50mg pills $203.00 Pretty straight forward.  Now for reverse.

Topamax 50mg pills $203.00 Reverse is a little more tricky, topamax 50mg pills $203.00 because the natural tendency of the FLV file is to play forward.  The way NetStream seeks — for this sort of setup (progressive download) — is that it looks for video keyframes — special frames in the video file itself — and navigates to those.  The frequency of video keyframes is determined when the video is encoded.  You might have keyframes every 300 frames.  For a video encoded at 25 frames per second (fps), topamax 50mg pills $203.00 that’s one keyframe every 12 seconds.  Sending the video ahead is one thing … it’s already traveling in that direction.  Sending the video back is somewhat akin to swimming upstream.  The actual numbers you find useful may vary, topamax 50mg pills $203.00 depending on the framerate, topamax 50mg pills $203.00 keyframe distribution, topamax 50mg pills $203.00 and length of the FLV in question, topamax 50mg pills $203.00 so the following values are just numbers that happened to work for me:

rw.onPress = function():Void {
  var dest:Number = ns.time;
  id = setInterval(function():Void {
    ns.seek(dest -= 2);
  }, topamax 50mg pills $203.00 100);
}

Topamax 50mg pills $203.00 Same sort of concept as before, topamax 50mg pills $203.00 but this time we declare a new variable, topamax 50mg pills $203.00 dest (for destination, topamax 50mg pills $203.00 but the name is arbitrary) and set it to the video’s current position — again, topamax 50mg pills $203.00 taken from the NetStream.time property.  Why take a “snapshot” of the position and use that, topamax 50mg pills $203.00 rather than a direct call to ns.time?  Well, topamax 50mg pills $203.00 unless we go to the trouble of pausing the video first, topamax 50mg pills $203.00 which means we’d have to unpause it later, topamax 50mg pills $203.00 the video wants to move forward.  Rather than deal with a constantly “struggling” value — time would exasperatedly be asking, topamax 50mg pills $203.00 “Do you want me to go forward or not!?” — we’ll just deal with a static number.  Here, topamax 50mg pills $203.00 again, topamax 50mg pills $203.00 a setInterval() loop decrements the seek value repeatedly.  This example decrements by 2 and does so every 100 milliseconds.  Start with those values, topamax 50mg pills $203.00 but experiment and find your own sweet spot.

Topamax 50mg pills $203.00 An onRelease event of the rw button stops the loop, topamax 50mg pills $203.00 as before.

Things to keep in mind

Topamax 50mg pills $203.00 Nothing stops the rewind routine from heading into negative numbers.  If the user holds down the RW button long enough, topamax 50mg pills $203.00 ns will be asked to seek to -100, topamax 50mg pills $203.00 -220, topamax 50mg pills $203.00 and so on.  Fortunately, topamax 50mg pills $203.00 seek() doesn’t care.  Anything lower than 0 gets sent to 0.  Same goes for the upper end:  anything higher than the duration of the video obviously can’t be sent higher than the number of seconds the video contains (and it won’t).

Topamax 50mg pills $203.00 Perhaps most importantly, topamax 50mg pills $203.00 seek() cannot send progressively downloaded videos to keyframes that haven’t yet loaded.  If the FLV file is still downloading and your user mashes the fast forward button, topamax 50mg pills $203.00 nothing may happen for a while.  Them’s the brakes.

Can it be done with the FLVPlayback Component?

Topamax 50mg pills $203.00 You bet.  Remember, topamax 50mg pills $203.00 the principle is that same, topamax 50mg pills $203.00 but the mechanics of it change a bit.  The FLVPlayback class in the Help docs serves up what you need. Topamax 50mg pills $203.00 (this is AS2, topamax 50mg pills $203.00 remember, topamax 50mg pills $203.00 so if you’re in an AS3 environment you’ll have to do some digging anyway).

var id:Number;
ff.onPress = function():Void {
  videoPlayer.pause();
  var dest:Number = videoPlayer.playheadTime;
  id = setInterval(function():Void {
    videoPlayer.seek(dest += 2);
  }, topamax 50mg pills $203.00 100);
}
ff.onRelease = function():Void {
  videoPlayer.play();
  clearInterval(id);
}
rw.onPress = function():Void {
  videoPlayer.pause();
  var dest:Number = videoPlayer.playheadTime;
  id = setInterval(function():Void {
    videoPlayer.seek(dest -= 2);
  }, topamax 50mg pills $203.00 100);
}
rw.onRelease = function():Void {
  videoPlayer.play();
  clearInterval(id);
}

Topamax 50mg pills $203.00 In this case, topamax 50mg pills $203.00 I found it helped after all to pause the video while seeking, topamax 50mg pills $203.00 which is why the onRelease handlers invoke FLVPlayback.play() again.  I also found that even fast forwarding benefits from the temporary dest variable; otherwise things got ugly pretty quickly.  Note, topamax 50mg pills $203.00 too, topamax 50mg pills $203.00 that I adjusted the increment value for fast forwarding.

Topamax 50mg pills $203.00 So … dash o’ this, topamax 50mg pills $203.00 splash o’ that.  This particular article is more of a loose recipe than a bulleted list of steps to follow, topamax 50mg pills $203.00 but I hope it gives you a bit to play with.  :)   Thanks to Dean Nixon for suggesting this topic.

Average Rating: 4.5 out of 5 based on 178 user reviews.

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