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POHow to make use of play2() function in order to perform fast stream switching of videos?
 

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  1. POHow to make use of play2() function in order to perform fast stream switching of videos?
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    <p>I am currently working on a Flash webplayer with resolution switching functionality. I am trying to make use of the NetStream class's <code>play2()</code> function in Actionscript.</p> <p>The problem I am running into is that the videos don't change quickly. For those familiar with the <code>play2()</code> function I believe that the player is performing a <code>"standard switch"</code> rather than a <code>"fast switch."</code></p> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/NetStreamPlayOptions.html#offset">The documentation says that</a> when the offset parameter is -1, fast switching occurs. What actually happens, though is once the <code>"NetStream.Play.Transition"</code> event is received, the player waits until the time denoted by <code>ns.time + ns.bufferLength</code> has been reached, before performing the switch.</p> <p>I thought fast switching cleared the buffer, but on a check to <code>ns.backbufferlength</code>, I found that everything is still cached. Also it mentions: "When offset is -1, the switch occurs at the first available keyframe after <code>netstream.time + 3</code>," which is why I am confused.</p> <p>Any help/insight on this matter would be much appreciated.</p> <p>Here is a snippet of code describing what is going on (<code>newStream()</code> is called when a user clicks to change to a new resolution, youtube style):</p> <pre><code>public function newStream(address:String):void { var opts:NetStreamPlayOptions = new NetStreamPlayOptions(); opts.streamName = address; opts.transition = NetStreamPlayTransitions.SWITCH; opts.offset = -1; ns.play2(opts); } private function nsCallback(event:NetStatusEvent) { switch(event.info.code) { case "NetStream.Play.Transition": { trace("Current time (on Transition): " + ns.time, "Buffer: " + ns.bufferLength); var estTime:Number = ns.time + ns.bufferLength; trace("Estimated Completion Time: " + estTime); break; } } } </code></pre>
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    1. USfunseiki
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      1. POHow to make use of play2() function in order to perform fast stream switching of videos?
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    1. COHave you looked into a **framework** that does *Dynamic Stream Switching* for you? I use one because it allows me to focus on other things (one less thing I have to worry about). OSMF will do a lot, but not DSS for http streams (yet). However, OVP (Akamai HDCore) will even do DSS for http streams to flash. Good luck!
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      1. POHow to make use of play2() function in order to perform fast stream switching of videos?
      1. USJacksonkr
    2. COI found a few while Googling for an answer to my question, but I was a building a pretty specific player (there are a few extra features that I added to it). Also, since I already had the majority of the player done (minus the "smooth" transitioning), I was hoping for a solution. As of now, I've made do with adding a little "loading" icon anytime there is a stream switch, though I have left the functionality available in case I ever do find an answer for this issue.
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    3. COinstead of a switching the video of same content can this be used to switch to a different video stream?
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      1. POHow to make use of play2() function in order to perform fast stream switching of videos?
      1. USAditya P
 

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