Comments on: How to load MP3 files from a FileReference

By: Marko

Marko — Tue, 22 Jun 2010 22:44:03 +0000

Hi, I’m using this to load sound from ByteArray. And I’m using changes made by Jerry and Anthony. But I’m getting an error: Error #2030: End of file was encountered. at readMultiByte()
I guess it has something to do with this line of code: var str:String=mp3Data.readMultiByte(3,”us-ascii”);
I guess this could mean that it wasn’t encoded properly or that my file is too large.
Any suggestions?

By: 张远龙(Zhang Yuanlong)

张远龙(Zhang Yuanlong) — Tue, 15 Jun 2010 04:41:22 +0000

Greetings!I’m a new learner of AS3.Your explanations of \How to load MP3 files from a FileReference\ are faily pellucid.Very well.But could you tell me how to create an in-memory image of a swf with the loaded sound data from a ByteArray Object ?And how to make it(the in-memory image) related to the FileReference Object?Does actionscript have built-in functions to open an mp3 file and play it?

By: Alexx

Alexx — Thu, 29 Apr 2010 11:07:48 +0000

Hi,

Really nice stuff here
I had problems with an mp3 file wich wasn’t loading properly (truncated duration), and now that’s working !

But I’ve noticed something else : in some parts of my sound, I have a perfect 0 volume wave part in the original file, and this gives a glitch in the converted sound

How could I fix that ? Maybe having a perfectly linear sound wave at zero is not allowed…

You will find a raw wav version of this file and its converted result here : http://alexx.krehmen.free.fr/mp3_bug/

the glitch can be heard near the end of the sound

Anyway, thanks for this great tool

By: 簡単なサウンドビジュアライザーを作ってみた。 | RIAブログ

簡単なサウンドビジュアライザーを作ってみた。 | RIAブログ — Fri, 23 Apr 2010 10:48:18 +0000

[...] byteArrayをmp3に自分で変換するのには、ちょっと無理があり、MP3FileReferenceLoaderというライブラリを使わせて� [...]

By: ias inglbert

ias inglbert — Fri, 09 Apr 2010 01:32:32 +0000

Nevermind, I think I figured out why. Flash estimates the length of the MP3 based upon the Content-Length header and your sample rate. Currently there is a bug that occurs when you use anything other than 44.1 kHz. My MP3s were 16kHz so it goofed on the duration calculations. After I switched to a 44kHz, it fixed the issue. More testing needs to be done.

By: ias inglbert

ias inglbert — Thu, 08 Apr 2010 21:23:25 +0000

After running this code, has anyone else run into a situation where the sound.length has grown ~2.9 times larger? This is after I go through this whole byteArray process. Everything works and plays. But the only issue is the sound length value is off by 290%. I want to piece various sounds together and have it sound somewhat natural. This is why the length is important for my case.

I loaded a mp3 that went through this bytearaay process and displayed the sound.length as:
36675.918367, then I loaded the mp3 normally and displayed the sound.length to be: 12636.009070. They both play perfectly fine.

By: MP3FileReferenceLoader « itamt

MP3FileReferenceLoader « itamt — Sun, 21 Mar 2010 05:33:15 +0000

[...] 详见作者博文。不过原作者并没有� 上对ID3信息的解析，“Annoyingly, all the id3 tags get stripped using this method, and I’m far too lazy to parse these too. ”这里提供的是Mike Almond整合了ID3解析的源� �。 [...]

By: Rahul

Rahul — Wed, 03 Mar 2010 03:30:10 +0000

As an update from - replaced the FileReference with a URLStream object. I am now able to access and build the mp3Data byteArray using the PROGRESS event. And on COMPLETE, the mp3Data is ready for use. But I am unable to start playing as I build the mp3Data. I have added the PROGRESS event to the MP3FileLoader. I am also able to start playing as soon as I have enough segments. However, I think every time I sample I end up creating a new sound object so all the sounds play together and gives a garbled effect. Any pointers on how to tackle this - basically how to build the sound object incrementally ?

By: Rahul

Rahul — Tue, 02 Mar 2010 04:31:56 +0000

This is a great post! I have being researching alternatives to loading an mp3 as a Sound object and this is bang on. But as a newbie to flash and AS I am not sure if there is any way to start playing the MP3 while it is still being streamed/loaded. Using the PROGRESS event on the fileRef wont work I guess since the data property isnt available until the file loads completely. Any suggestions would be great appreciated?

By: Marc

Marc — Thu, 18 Feb 2010 07:47:20 +0000

Wow, this is amazing work!

Of course, we always want more Is there a way to use this technique without loading the entire mp3 file into memory? For a track like a long DJ set, this can be a burden.

Thanks!!