Flash Player 9 and sound.start(time)

[NickJ]

Hi,

I've been using Flash to deliver audio clips on a work-related eLearning project I've put together.

The Flash loads in an mp3 (constant bitrate @ 32kbps) file and then plays a clip from that file using sound.start(startTime) and polling the sound.position property to stop the file when the clip has been played.

This all works fine with Flash Player 8 installed, but as soon as I install Flash Player 9, the audio clip doesn't start playing from the given position.

I've even created a little fla that just loads in one of my audio files and plays it from 10 seconds in - still going pear-shaped!

var mySound:Sound=new Sound();
mySound.onLoad=function(){
	mySound.start(10,0);
}
mySound.loadSound("audio/ChildProtection_00.mp3");

Instead it's playing from about 15 seconds into the file!

Anyone got any thoughts on what might be going on here?

Any help gratefully received - I'm pulling my hair out here.

Cheers,

NickJ

[ashleyk]

i used your code snippet and can't repeat your problem, though i'm testing it locally.

I did have some other weirdness that might contribute to your problem, perhaps this modified code might help you?

var my_sound:Sound = new Sound();
my_sound.onLoad = function(success:Boolean) {
	if (success) {
		this.start(19);
	}
};
 
my_sound.loadSound("opr0006P.mp3", true);
my_sound.stop();

[NickJ]

Thanks for looking at this. Actually, it looks like it was a problem with the MP3 files that FP9 was having a problem with. I've re-exported the audio files using a later version of Audacity and things are working smoothly in FP8 and FP9 now.

Bizarre!

Cheers,

NickJ

[thehiatus]

I'm running into this same problem. I'm using LAME to compress MP3s. When I compress at 32kbps Sound.start() seems to start the audio a little after the specified offset. When compressed at 64kbps, it starts a little before the offset. Do you know what compressor/settings you used that worked well in Flash 9?

Thanks!

~E

[NickJ]

I think I re-encoded at 64kbps at 44Khz. Can't quite remember though.

Could be worth trying a different version of the LAME encoder. I did read about some problems with LAME when I was looking at DIVXing movies.

NickJ