[MacDV] Re: MP3 Audio Extraction From MPEG Movie?

[Thubten Kunga]

I did not use BBDemux to demux the MPEG movie. I used "mpgtx GUI mpeg 
editor" at version tracker but "mpgtxwrap" when you really get it to 
accomplish the demux. That rendered an audio file that was indentified 
in iTunes' get info window as a MPEG 1 Layer 2 file. iTunes 
advanced—>convert file to MP3 command readily did the conversion. 
However, the MP3 file is in the library at that point and you have to 
do a search by song title to find it. Another get info proved the file 
was converted to MPEG 1 Layer 3 (the definition of an MP3 file). Plus a 
bit rate of 96kbps showed up where no bit rate was listed for the layer 
2 version that "mpgtxwrap" yielded.

I guess you overlooked this original follow up email I posted. I don't 
even know what BBDemux is and I never made a reference to it in any of 
my posts. Where did you get the idea I used it? Here is the link to the 
correct demuxing application.

> <http://www.versiontracker.com/moreinfo.fcgi?id=15987&db=mac>

k

On Friday, March 7, 2003, at 10:07  PM, Filipe M. wrote:

> I guess you may have gotten yourself a multiplexed (muxed) file. In 
> Quicktime Pro, press command-J and see what appears in the left 
> pop-up; you should have something like Movie and Muxed Track.
>
> If so, Quicktime will not demux the audio and video tracks apart.
>
> Under OS X, 
> <http://www.versiontracker.com/moreinfo.fcgi?id=15987&db=mac> might do 
> the trick for you...
>
> Hope I have helped,
>
> Filipe

On Monday, March 10, 2003, at 09:34  AM, Eric Phillips wrote:

> Kunga,
> I am sorry I am a couple of days behind here. From what I understand
> here is that you demuxed the original file then took the audio file and
> had itunes convert it to MP3. Do you know if there is something
> different about the audio file you had and the one that BBDemux 
> creates?
> I tried this same thing this past weekend but using BBDemux. All worked
> well but iTunes would not convert the file. iTunes would play the fiel
> but when I chose Convert to MP3 I got an error that iTunes did not
> support the file type. Any suggestions? Maybe I need to go through the
> AudioHijack step.
>
> Eric
>
>>>> Kunga at FutureMedia.org 03/08/03 02:19AM >>>
> Thanks Steven,
> Filipe over at the Mac Pro Audio list gave me the answer. I knew you
> would want to know what it is. This is such an interesting set of
> posts, I'm including the entire chronology. I am so excited I performed
>
> my first Demux of an embedded MPEG1 Video and successfully extracted
> the MPEG1 Layer 2 audio track and then used iTunes to convert it to a
> 96kbps MP3 file. And it was so damned easy. I didn't know what I was
> doing and yet I did it !! UNIX programmers are amazing. Thank GOD for
> Mac OS X and UNIX together at last.
>
> k