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RE: Audio Files for Testing (thanks phl!)

From: Kris Krueger <krisk@microsoft.com>
Date: Fri, 18 Jun 2010 17:44:37 +0000
To: Philippe Le Hegaret <plh@w3.org>, Maciej Stachowiak <mjs@apple.com>
CC: "'public-html-testsuite@w3.org'" <public-html-testsuite@w3.org>
Message-ID: <FA9085650D2F8B4A9D501ED9D9706E9A1251754F@TK5EX14MBXW652.wingroup.windeploy.ntdev.microsoft.com>
I took a peek again that the mp4 audio files, indeed they are using the AAC codec in a MP4 container.
So we should be set, though we could use MP3 files as well.

Philippe do you want me to email you MP3 files converted from the wav files directly?  
These mp3 files are ~ 1.8 megs total in size, so I don't want to spam this list with a big email.


-----Original Message-----
From: Philippe Le Hegaret [mailto:plh@w3.org] 
Sent: Thursday, June 17, 2010 12:42 PM
To: Maciej Stachowiak; Kris Krueger
Cc: 'public-html-testsuite@w3.org'
Subject: Re: Audio Files for Testing (thanks phl!)

On Thu, 2010-06-17 at 12:34 -0700, Maciej Stachowiak wrote:
> On Jun 17, 2010, at 12:31 PM, Philippe Le Hegaret wrote:
> > On Thu, 2010-06-17 at 18:59 +0000, Kris Krueger wrote:
> >> Actually we also need another file type - AAC in a MP3 container.
> >> Philippe I can convert the wav and send you this file format if it helps.
> > 
> > I don't seem to be able to encapsulate aac in an mp3 container. So 
> > yes, I'd appreciate if you can send me this file format.
> I don't think there is such a thing as an MP3 container. MP3 is a codec (technically MPEG-2 Audio Layer 3), not a container format.

Ah, I was wondering about that in fact. My various encoders were indeed acting strangely when I was trying to produce the combination.

>  MPEG-4 AAC audio is conventionally served in an MPEG-4 container. You might be able to put it in an MPEG-2 container instead (to match MP3), but I am not sure that is a sensible or useful configuration.

Kris, note that the MP4 contains aac. Are you sure you're not looking for that? Or are you simply looking for an MP3 file?

Received on Friday, 18 June 2010 17:45:50 UTC

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