This deals with some issues I’m having with the seekbar of a player. The seekbar is the area that displays the video time as a bar that shows your current position/percentage of the video, it can also display the loaded portion of the video among other things as well. Including the video players I’ve made, most player code seems to use bytesLoded / bytesTotal to calculate the amount loaded and display in the loadbar (or whatever you call it), this load bar relates to the filesize as it reads the bytes loaded out of the total. In this same scrub bar area, I like to display the current video time in the playbar as the currentTime / totalTime, notice that this relates to the time and not the file size.

Since video is usually a variable bit rate, the loadbar (size) and the playbar (time) are not representing the same data of the video. Let’s consider an extreme example case video that consists of a first half containing live action with lots of colors and motion while the second half is a still image black and white slideshow. Understandably the first half of the video will be larger in file size than the second half, even though they each represent the same duration or half of a video… So the first half of the loadbar (size) would not correctly represent the first half of the playbar (time). So the user who watching the video load to the half point, and scrubbing to halfway through the video by clicking the load bar will see errors… The player will not be able to play the halfway (time) yet because that time is not yet loaded, even though the file is halfway loaded (size). So if we allow scrubbing through the video by clicking on the loadbar, there is a good chance that the user experience suffers because the loadbar (size) and playbar (time) are not interchangeable
Calculating display bar actionscript code:

Scrub on click actionscript code:

A possible simple solution I’ve thought of is to just display a loading graphic if they click a time which has not yet loaded, but that seems counter intuitive and backwards, since the load bar would display that time as having being loaded.

I have not seen anything in documentation or anywhere online that suggests any other way to display the amount loaded which would represent the amount of TIME loaded rather than SIZE. Is there a way to know what time has loaded in the video and display that in the loadbar rather than display the percent of kb loaded?

Can anyone see something I am missing?

P.S. I already tried a couple forums to no avail: Actionscript.org forum post and gotoandlearn forum post.

I find that Drag and Drop is the most intuitive form of user interaction (at least using a mouse). Actionscript has some of this functionality built in, with the interactive functions startDrag and stopDrag, these can help make our coding pretty easy. If you are transitioning from as2, the code was incredibly simple:

Actionscript2

On the movie clip action panel you’d just put that script, which is actually pretty readable even if you don’t know code. The releaseOutside is to keep from the clip missing the release event, because sometimes if a user released the mouse button but was not currently over the clip being dragged for whatever reason, it will not stop dragging.

Actionscript 3

Some things have changed with as3, other than the actual coding structure, the biggest change for me doing drag and drop in the new actionscript was that the mouse events have changed. There is no more a press or release. They were replaced with, MOUSE_DOWN and MOUSE_UP. There is no more releaseOutside either and this one is a little more complicated to find among the new MouseEvent list.
Leaving it out works, but we still have the same problem. Check out the working example below and try dragging the red ball to the green or yellow one and drop it there. Since the green is above the red in the layer sequence, the mouse is over the green and when the MouseEvent.MOUSE_UP fires, it’s not on the red ball but on the green, so we don’t get to the code that drops the red ball. So the red ball code basically has times when the dragging sticks even after we release the mouse button. Not to mention the dragging is very jumpy!

Using the Mouse Move event will help us to customize our behavior a bit more. Plus I wanted to get a more abstract level to it, so I could apply the event listeners to any display object and use the event properties to target the right clips. We begin the drag with the Mouse Down, and the create some other eventListeners for the stage that will watch the Mouse Move and Up events. So clicking on the green or yellow ball, fires the grabMe function which sets the me variable (which will hold any object) to the current target of the event, which should always be the object that you click. So we are using the same code for both the green and yellow ball. I’m a big fan of code consolidation and reuse, it takes a little more effort, but the code is much more clean and portable even. Then we add the event listeners for the stage on MOUSE_MOVE and MOUSE_UP. So first, mthe dragMe function, just says to update after event. This makes the animation smoother cause it only updates the display after the event completes it’s process. Then the drop me function is attached to the stage, so anywhere you release the mouse, the object will stop dragging, plus we remove the stage event listeners and add back the listener for the original object (me). Note the buttonMode property as well, this will make the cursor turn to a hand when you hover that object.

This functionality is much smoother and then when I want to add more code to the dragging or dropping, I have a place to do it already!

Example

Source

as3dragdrop-ball.fla

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