AS3 - how to change speed of FLVPlayBack - actionscript-3

Question

i need to play FLVPlayback Video at different speeds , can i do this by changing frame-rate of FLVPlayBack and how can i achieve this using as3?
Or is there any other method to do the same? Please Suggest me.
Meghana

Answer 1

There's no way to change the framerate of a video in AS3, it will be always rendered at the video's native framerate.
The only way I can think to do it is to write some sort of function that calculates how to move the playhead, but I cannot guarantee the result of this approach.....
EDIT:
As you ask in your comment, YES, you can do it by controlling the NetStream. Here you have the solution: http://younsi.blogspot.it/2009/03/how-to-play-video-in-flash-in-slow.html

Answer 2

Chiming in a bit late, but there's actually a way to play an FLV in slow motion without constantly seeking or playing/pausing repeatedly. It's just extremely involved.
If you open the .flv file using a URLStream then you can access the bits. Scan for the timestamp, re-write it, then pass the new ByteArray to a NetStream in data generation mode. Using this you can play video at any frame rate - although the ability to play audio in slow / fast motion depends on the codec being used. The layout of an FLV packet is something like:
"FLV"
packet length
packet type (audio / video / metadata)
timestamp
additional headers
data
To change the audio sample rate you would need to muck with the data - much more convoluted than just changing timestamps. I know, for instance, that AAC data has a header which specifies the sample rate as an index into an array:
[ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350 ]
So if you had 44.1 kHz audio (sample rate index = 4) you could play at half speed by declaring the sample rate to be 22.05 kHz (sample rate index = 7)

Answer 3

//set your framerate here whatever you want
stage.frameRate = 30;
var FRAMERATE : Number = stage.frameRate;
btnActual.addEventListener(MouseEvent.CLICK, videoSpeed);
btn15.addEventListener(MouseEvent.CLICK, videoSpeed);
btn5.addEventListener(MouseEvent.CLICK, videoSpeed);
function videoSpeed (myEvent:Event):void{
var newFrameRate = Number(myEvent.target.value);
stage.frameRate = newFrameRate;
}